14โ€“18 Jul 2025
Leibniz Institute for Astrophysics Potsdam (AIP)
Europe/Berlin timezone

Session

Talks

14 Jul 2025, 09:00
Conference Room, Maria-Margaretha-Kirch building (Leibniz Institute for Astrophysics Potsdam (AIP))

Conference Room, Maria-Margaretha-Kirch building

Leibniz Institute for Astrophysics Potsdam (AIP)

An der Sternwarte 16 14482 Potsdam, Germany

Conveners

Talks: SN & ISM 1

  • Kathryn Kreckel (Heidelberg University)

Talks: CRs & Radation

  • Maria Werhahn

Talks: Winds 1

  • Jake Bennett (Center for Astrophysics | Harvard & Smithsonian)

Talks: AGN 1

  • Meredith Powell

Talks: CGM 1

  • Cassandra Lochhaas (Center for Astrophysics | Harvard & Smithsonian)

Talks: SN & ISM 2

  • Matt Orr (Flatiron Institute & Rutgers University)

Talks: Winds 2

  • Alankar Dutta (Max Planck Institute for Astrophysics)

Talks: CGM 2

  • Ramona Augustin (AIP)

Talks: CRs & Magnetic Fields

  • Allison Matthews (Carnegie Observatories)

Talks: High-z 1

  • Enrico Garaldi (Kavli Institute for Physics and Mathematics of the Universe)

Talks: Low-z 1

  • Kirsten Hall (Center for Astrophysics | Harvard & Smithsonian)

Talks: AGN 2

  • Rosie Talbot

Talks: High-z 2

  • Sirio Belli (Universitร  di Bologna)

Talks: Low-z 2

  • Matthieu Schaller (Lorentz Institute & Leiden Observatory)

Presentation materials

There are no materials yet.

  1. Thorsten Naab
    14/07/2025, 09:00
    Invited talk
  2. Francesco Belfiore (INAF - Arcetri Astrophysical Observatory)
    14/07/2025, 09:25
    Supernova feedback & ISM
    Talk

    HII regions are fundamental units of the matter cycle in galaxies and their optical emission serves as the main lens through which we study star formation and chemical enrichment across the Universe. They are the sites where ionising radiation and stellar winds have their main impact, turbulence is injected, and heavy elements are dispersed into the interstellar medium. The sizes and internal...

    Go to contribution page
  3. Matt Orr (Flatiron Institute & Rutgers University)
    14/07/2025, 09:45
    Supernova feedback & ISM
    Talk

    In this talk I will present results from the FIRE cosmological zoom-in simulations exploring the (un)changing properties of the ISM through cosmic time, from redshift three to zero. I will highlight how on (sub)kiloparsec scales, several important properties of the ISM do not change as the galaxies grow and evolve from dispersion-supported, star-bursting objects to rotation-supported, smoothly...

    Go to contribution page
  4. Lise Ramambason (Heidelberg University)
    14/07/2025, 10:05
    Supernova feedback & ISM
    Talk

    Nearby galaxies observed at high spatial resolution with JWST, ALMA, and MUSE allow us to address fundamental questions related to the influence of young stars on their surrounding interstellar medium (ISM), from cloud to galactic scales: How far can ionizing photons travel, and what physical mechanisms favor their escape from HII regions? How do such processes shape the ISM and influence...

    Go to contribution page
  5. 14/07/2025, 10:25
    Panel discussion
  6. Mattheusz Ruszkowski
    14/07/2025, 11:20
    Invited talk
  7. Timon Thomas (Leibniz-Institute for Astrophysics Potsdam)
    14/07/2025, 11:45
    Cosmic rays & radiative feedback
    Talk

    The interstellar and circumgalactic media are the two important reservoirs that fuel star formation in galaxies. Their highly turbulent internal dynamics are shaped by feedback processes such as supernova (SN) explosions and subsequently accelerated cosmic rays (CRs). With recent advances in the hydrodynamical modeling of the interactions between CRs, magnetic fields, and their environment, it...

    Go to contribution page
  8. Allison Matthews (Carnegie Observatories)
    14/07/2025, 12:05
    Cosmic rays & radiative feedback
    Talk

    Modern computational advancements have brought about a resurgence in the consideration of cosmic-rays for driving galactic outflows. This is particularly important in normal galaxies whose thermal and radiation pressure alone is insufficient to expel gas and dust from the disk. Synchrotron radio emission is one of the onlyโ€”and by far the most accessibleโ€”direct tracers of cosmic-rays in...

    Go to contribution page
  9. Francisco Rodriguez Montero (KICP, University of Chicago)
    14/07/2025, 12:25
    Cosmic rays & radiative feedback
    Talk

    Despite the many successes of cosmological galaxy formation and evolution simulations, they commonly implement baryonic feedback in a phenomenological manner by calibrating โ€œboostingโ€ parameters, which somewhat diminishes their predictive power and restricts their usefulness in interpreting observational data. An alternative approach is to improve the modelling of feedback processes from first...

    Go to contribution page
  10. 14/07/2025, 12:45
    Panel discussion
  11. Matthew Smith
    14/07/2025, 14:30
    Invited talk
  12. Sirio Belli (Universitร  di Bologna)
    14/07/2025, 14:55
    Observed properties and theory of galactic winds
    Talk

    Thanks to the unprecedented sensitivity of JWST/NIRSpec, we are now able to study neutral atomic outflows in massive galaxies at high redshift. By detecting optical resonant lines such as Na D and Ca K, which have long been inaccessible from the ground, we have characterized the velocity and mass outflow rate of the neutral phase for a representative sample of galaxies at z~2, finding that...

    Go to contribution page
  13. Capucine Barfety (Max Planck Insitute for Extraterrestrial Physics)
    14/07/2025, 15:15
    Observed properties and theory of galactic winds
    Talk

    Feedback in the form of outflows is believed to be a key ingredient in galaxy evolution. In cosmic noon galaxies, outflows have mainly been detected - and extensively studied - in the ionised gas phase. However, it has been surmised that a large fraction of outflowing mass may be in molecular gas form, as suggested by results of luminous but rare AGNs and quasars. To gain insights into the...

    Go to contribution page
  14. Kastytis Zubovas (Center for Physical Sciences and Technology)
    14/07/2025, 15:35
    Observed properties and theory of galactic winds
    Talk

    Massive, large-scale galactic outflows are well known to be important to galaxy evolution. They shape the high-mass end of the mass function, enriching the circumgalactic and intergalactic medium, preventing the cooling catastrophe in galaxy clusters and so on. They also presumably establish the observed correlations between supermassive black holes and their host galaxies, such as the M-sigma...

    Go to contribution page
  15. 14/07/2025, 15:55
    Panel discussion
  16. Cristina Ramos-Almeida
    14/07/2025, 16:40
    Invited talk
  17. Hsiang-Yi Karen Yang (National Tsing Hua University)
    14/07/2025, 17:05
    AGN jet & quasar feedback
    Talk

    Relativistic jets emanating from active galactic nuclei (AGNs) play a pivotal role as a feedback mechanism in the Universe, and the cosmic rays (CRs) carried by AGN jets can have profound influence on galaxy properties and the circumgalactic medium. Consequently, self-consistent modeling of CR propagation, spectral evolution, and emission mechanisms is imperative for understanding the thermal...

    Go to contribution page
  18. Zsofi Igo (Max Planck Institute for Extraterrestrial Physics)
    14/07/2025, 17:25
    AGN jet & quasar feedback
    Talk

    In this talk, I will show how the study of AGN incidence distributions is a powerful tool to understand the global energetics of AGN feedback. We use the complete, spectroscopic GAMA09 survey (z<0.4) to measure the fraction of galaxies hosting radio and X-ray AGN, defined using LOFAR and eROSITA data, as functions of mass-scaled power indicators. We recover the previously found mass-invariant...

    Go to contribution page
  19. Miha Cernetic (The University of Chicago)
    14/07/2025, 17:45
    AGN jet & quasar feedback
    Talk

    The profound influence of supermassive black holes (SMBHs) on their host galaxies includes altering the orbits of stars, regulating star formation, modifying gas distribution, to name a few. To understand these processes we need to first understand how SMBHs grow through gas accretion and their associated feedback into the surrounding environment. These factors remain a current crucial...

    Go to contribution page
  20. 14/07/2025, 18:05
    Panel discussion
  21. Max Gronke
    15/07/2025, 09:00
    Invited talk
  22. Hsiao-Wen Chen (The University of Chicago)
    15/07/2025, 09:25
    Circumgalactic medium and multiphase gas
    Talk

    The CGM and IGM contain fuel for future star formation and a record of past feedback. They are uniquely sensitive to the physics of baryonic flows. Diffuse, ionized plasmas such as the CGM are expected to be turbulent, because of the expected high Reynolds number. The presence and magnitude of this turbulence have profound implications for the sources that drive the thermal and dynamic...

    Go to contribution page
  23. Ramona Augustin (AIP)
    15/07/2025, 09:45
    Circumgalactic medium and multiphase gas
    Talk

    Gas flows in and out of galaxies are typically probed by quasar absorption lines which are usually limited to a single sightline through the halo, giving no information on the spatial structure of the gas probed in absorption. First studies using lensed, multiple or extended background objects have shown that there can be significant variation of absorber strengths on relatively small (~kpc...

    Go to contribution page
  24. Rainer Weinberger
    15/07/2025, 10:05
    Circumgalactic medium and multiphase gas
    Talk

    The gas cycle in and around galaxies is key to their evolution. Cosmological simulations have made enormous progress over the past decade in coming up with effective models for galaxy formation, unifying the Lambda cold dark matter cosmological model with the theory of galaxy formation. Yet, these simulations still struggle to accurately represent warm and cold gas and its cycling in space and...

    Go to contribution page
  25. 15/07/2025, 10:25
    Panel discussion
  26. Lucia Armilotta
    15/07/2025, 11:20
    Invited talk
  27. Oleg Egorov (Heidelberg University)
    15/07/2025, 11:45
    Supernova feedback & ISM
    Talk

    Massive stars in star-forming regions inject huge amounts of energy and momentum into the ISM, producing ubiquitous superbubbles, turbulent gas motions and outflows. The coupling efficiency of mechanical stellar feedback and its dependence on metallicity remains uncertain in simulations. High angular resolution observations with integral-field spectrographs (e.g., MUSE), combined with the...

    Go to contribution page
  28. Patrick Hennebelle
    15/07/2025, 12:05
    Supernova feedback & ISM
    Talk

    Understanding what regulates star formation in galaxies is a fundamental question in astrophysics. However, a simple estimate of the star formation rate (SFR) that a galaxy like ours should have overpredicts the observed SFR by nearly two orders of magnitude. Over the past 50 years, three main explanations have been proposed to account for these low observed SFRs: magnetic fields, turbulence,...

    Go to contribution page
  29. Xinyue Liang (Institute of Theoretical Astrophysics, University of Heidelberg)
    15/07/2025, 12:25
    Supernova feedback & ISM
    Talk

    The small-scale processes of star formation and feedback are tightly linked to galaxy evolution through a multi-scale matter cycle. During this cycle, stars form from the interstellar medium (ISM), and reshape it by injecting energy, momentum and metals, completing a feedback loop. The duration and the efficiency of the successive stages of this cycle vary across and within galaxies, but the...

    Go to contribution page
  30. 15/07/2025, 12:45
    Panel discussion
  31. Crystal Martin (UC Santa Barbara)
    16/07/2025, 09:00
    Invited talk
  32. Aditi Vijayan (Australian National University)
    16/07/2025, 09:25
    Observed properties and theory of galactic winds
    Talk

    Galactic-scale outflows, driven by supernova feedback in Milky Way-mass galaxies, play a crucial role in transporting metals from the disc to the circumgalactic medium (CGM). The distribution of these metals across different temperature phases within multiphase outflows is key to understanding CGM enrichment, as metal loading varies between phases. High-resolution, idealized simulations of...

    Go to contribution page
  33. Suraj Poudel (Texas Christian University)
    16/07/2025, 09:45
    Observed properties and theory of galactic winds
    Talk

    Starburst regions in a galaxy are the primary source of stellar-driven winds, which contribute to regulating the star-formation cycle. We investigate the properties of the gas distribution, kinematics, and ionization conditions of the near-side outflow along eight sightlines that reside in the 30 Doradus region of the LMC using UV absorption-line and H I 21-cm radio emission-line observations....

    Go to contribution page
  34. Ismael Alejandro Pessa Gutierrez (AIP)
    16/07/2025, 10:05
    Observed properties and theory of galactic winds
    Talk

    I present the first statistical study of circumgalactic outflows mapped through MUSE observations of Mg II 2796, 2803 emission, revealing extended halos that span several tens of kiloparsecs from their host galaxies. These observations herald a significant advance for deciphering the role of feedback processes in regulating galaxy evolution. Our analysis combines deep MUSE observations with an...

    Go to contribution page
  35. 16/07/2025, 10:25
    Panel discussion
  36. Cรฉline Pรฉroux (ESO)
    16/07/2025, 11:20
    Invited talk
  37. HItesh Kishore Das (Max Planck Institute for Astrophysics, Garching)
    16/07/2025, 11:45
    Circumgalactic medium and multiphase gas
    Talk

    Galaxies interact with their surrounding circumgalactic medium (CGM) through complex feedback mechanisms that regulate their evolution. The CGM, like other astrophysical media, is a turbulent, magnetised environment where mixing processes and radiative cooling drive the formation of multiphase gas. Understanding this multiphase nature is crucial for understanding the baryon cycle, yet...

    Go to contribution page
  38. Matthias Weber
    16/07/2025, 12:05
    Circumgalactic medium and multiphase gas
    Talk

    The circumgalactic medium (CGM) is the nexus of galaxy formation. Fresh gas that fuels star formation must pass through the CGM to reach the interstellar medium, while material accelerated by feedback and expelled from galaxies builds up a gaseous reservoir in the CGM. Observations reveal vast amounts of cold gas in the CGM, yet the processes that shape its dynamics remain uncertain....

    Go to contribution page
  39. Duarte Muรฑoz Santos (Laboratoire d'Astrophysique de Marseille)
    16/07/2025, 12:25
    Circumgalactic medium and multiphase gas
    Talk

    Studying the circumgalactic medium (CGM) is a challenge, particularly at the key epoch prior to Cosmic Noon ($z > 2$), where galaxies samples remain very small. However, there is an abundance of Lyman-alpha forest data that contain a wealth of information about the conditions present in this medium.

    Morrison et al (2024) showed that a new class of CGM absorption should be studied: Strong...

    Go to contribution page
  40. 16/07/2025, 12:45
    Panel discussion
  41. Philipp Girichidis (Heidelberg University)
    16/07/2025, 14:30
    Invited talk
  42. Maria Werhahn
    16/07/2025, 14:55
    Cosmic rays & radiative feedback
    Talk

    Cosmic rays (CRs) are ubiquitous in the interstellar medium (ISM) of the Milky Way and nearby galaxies and are thought to play an essential role in governing their evolution. However, many of their properties remain poorly constrained. Since direct measurements of CRs are limited to our local environment, observations of radio and gamma-ray emission arising from CRs provide a powerful tool to...

    Go to contribution page
  43. Joseph Whittingham (AIP)
    16/07/2025, 15:15
    Cosmic rays & radiative feedback
    Talk

    In previous work, we have shown that magnetic fields are fundamental to the evolution of MW-like galaxies. Specifically, in the Auriga model, magnetohydrodynamic (MHD) simulations produce realistic galaxies with spiral arm structure and radially-extended discs, whilst their hydrodynamic counterparts are systematically smaller, and exhibit bar and stellar ring features not observed in nature....

    Go to contribution page
  44. Benedikt Diemer (University of Maryland)
    16/07/2025, 15:35
    Cosmic rays & radiative feedback
    Talk

    It is generally believed that the magnetic dynamo in galaxies is a key factor in amplifying small cosmic seed fields to the strengths observed today, both within galaxies and in the CGM/IGM. While simulations with MHD have generally shown modest changes of the overall star formation, magnetic fields are a key factor in the propagation of cosmic rays and their effect on the cloud-scale physics...

    Go to contribution page
  45. 16/07/2025, 15:55
    Panel discussion
  46. Sandro Tacchella (KICC, University of Cambridge)
    17/07/2025, 09:00
    Invited talk
  47. Annalisa Pillepich (Max Planck Institute for Astronomy)
    17/07/2025, 09:25
    High-z galaxy formation & reionization
    Talk

    Large-scale cosmological simulations of galaxies like IllustrisTNG have been enormously useful at providing quantitative insights on galaxy evolution, especially after the end of Reionization. However, their limited numerical resolution and, crucially, their crude implementations of the physics of star formation, of stellar feedback, of cold gas and of the interstellar medium makes them less...

    Go to contribution page
  48. Tobias Looser (Harvard University)
    17/07/2025, 09:45
    High-z galaxy formation & reionization
    Talk

    Directly observing the first quenched galaxies and understanding the feedback mechanisms that shaped their star-formation histories (SFHs), quenching and baryon cycles is crucial for constraining galaxy formation models. Prior to JWST, quenched galaxies were only identified up to z < 4, and high-redshift (z > 3) quenched galaxies were exclusively massive (Mโ‹† > 10^10 MโŠ™). JWST has now pushed...

    Go to contribution page
  49. Nicholas Choustikov (University of Oxford)
    17/07/2025, 10:05
    High-z galaxy formation & reionization
    Talk

    Various solutions have been proposed to solve the high-redshift `bright galaxy problem', such as more efficient star formation, more bursty star formation, and top heavy initial mass functions. While equally interesting, each scenario must also differ in how these stellar populations couple to the interstellar medium (ISM) through stellar feedback. In this talk, I will present first results...

    Go to contribution page
  50. 17/07/2025, 10:25
    Panel discussion
  51. Kathryn Kreckel (Heidelberg University)
    17/07/2025, 11:20
    Invited talk
  52. Ava Polzin (The University of Chicago)
    17/07/2025, 11:45
    Feedback in galaxies since cosmic noon
    Talk

    There is ample empirical evidence that galaxiesโ€™ star formation efficiency is nearly universal even across a wide range of galactic environments and metallicities. We use a suite of high-resolution hydrodynamics simulations of isolated galaxies at different metallicities to study how the cold, dense interstellar medium and star formation rate vary as a function of chemistry, ionizing radiation...

    Go to contribution page
  53. Nicolas Bouche (CRAL)
    17/07/2025, 12:05
    Feedback in galaxies since cosmic noon
    Talk

    The cool gaseous halos around galaxies hold some of the keys in understanding feedback and galactic winds. This cool halo gas can be best studied with background quasars, which are very sensitive probes of not only its presence, but also of its kinematics. With a sample of more than 100 galaxy-quasar pairs from the Megaflow survey, I will present the latest constraints on the metal...

    Go to contribution page
  54. Jake Bennett (Center for Astrophysics | Harvard & Smithsonian)
    17/07/2025, 12:25
    Feedback in galaxies since cosmic noon
    Talk

    Many cosmological simulations typically rely on highly mass loaded, ejective winds, particularly for low mass galaxies, to regulate star formation. Recent hints from observations, analytical theory, and idealised simulations have pointed towards lower mass loadings, and a more preventative form of feedback. Using the Arkenstone winds framework, for the first time we model the impact of low...

    Go to contribution page
  55. 17/07/2025, 12:45
    Panel discussion
  56. Tiago Costa (Newcastle University)
    18/07/2025, 09:00
    Invited talk
  57. Mandy Chen
    18/07/2025, 09:25
    AGN jet & quasar feedback
    Talk

    The recent advent of high-throughput integral-field-unit spectrographs (IFS) has enabled unprecedented sensitivity in mapping low-density gas, opening new avenues for probing the dynamical states of the interstellar and circumgalactic medium (ISM and CGM). In this talk, I will present an investigation into turbulence and energy injection mechanisms in luminous quasar halos across redshifts...

    Go to contribution page
  58. Evan Scannapieco (Arizona State University)
    18/07/2025, 09:45
    AGN jet & quasar feedback
    Talk

    Feedback from active galactic nuclei (AGN) plays an essential role in current models of galaxy formation, yet the details of this process remain extremely uncertain. I will describe our work combining numerical simulations with microwave and X-ray observations to better constrain this process. Our team has conducted a series of simulations covering a broad range of feedback properties. At...

    Go to contribution page
  59. Philipp Grete (University of Hamburg)
    18/07/2025, 10:05
    AGN jet & quasar feedback
    Talk

    We present initial results from extremely well-resolved 3D magnetohydrodynamical simulations of idealized galaxy clusters, conducted using the AthenaPK code on the Frontier exascale supercomputer. These simulations explore the self-regulation of galaxy groups and cool-core clusters by cold gas-triggered active galactic nucleus (AGN) feedback incorporating magnetized kinetic jets. Our...

    Go to contribution page
  60. 18/07/2025, 10:25
    Panel discussion
  61. Harley Katz (University of Chicago)
    18/07/2025, 11:20
    Invited talk
  62. Arghyadeep Basu (MPA, Garching)
    18/07/2025, 11:45
    High-z galaxy formation & reionization
    Talk

    Since JWST began providing breakthrough results in July 2022, our understanding of early galaxy formation has been challenged. While HST enabled us to observe galaxies out to z ~ 10, JWST has pushed this boundary further, revealing an unexpected overabundance of massive galaxies at z > 10. This discovery challenges theoretical models, implying rapid evolution of dark matter halos during this...

    Go to contribution page
  63. Taysun Kimm (Yonsei University)
    18/07/2025, 12:05
    High-z galaxy formation & reionization
    Talk

    Lyman-alpha (Lyฮฑ) emission serves as a valuable probe of gas kinematics in and around galaxies. Observations of high-redshift galaxies frequently exhibit distinctive Lyฮฑ spectral features, often indicative of optically thick, neutral galactic outflows. However, the extent to which galaxy formation simulations can reproduce these observations remains an open question. We investigate this issue...

    Go to contribution page
  64. Matthieu Schaller (Lorentz Institute & Leiden Observatory)
    18/07/2025, 12:25
    High-z galaxy formation & reionization
    Talk

    The COLIBRE model of galaxy formation is the new flagship suite of simulations of the Virgo consortium. It builds upon years of development by a big team and is a substantial leap forward compared to the previous (and existing) generation of models. In brief, the key improvements are: (1) a modelling of the cold ISM phase, (2) a multi-grain, multi-size fully-coupled dust model, (3) the...

    Go to contribution page
  65. 18/07/2025, 12:45
    Panel discussion
  66. Vadim Semenov (Harvard University)
    18/07/2025, 14:30
    Invited talk
  67. Eric Zhang (University of California, Riverside)
    18/07/2025, 14:55
    Other topics in galaxy formation
    Talk

    Simulations of galaxy formation are mostly unable to resolve the energy-conserving phase of individual supernova events, having to resort to subgrid models to distribute the energy and momentum resulting from stellar feedback. However, the properties of these simulated galaxies, including the morphology, stellar mass formed and the burstiness of the star formation history, are highly sensitive...

    Go to contribution page
  68. Kirsten Hall (Center for Astrophysics | Harvard & Smithsonian)
    18/07/2025, 15:15
    Feedback in galaxies since cosmic noon
    Talk

    Despite recent discoveries of quasar feedback in action through outflows and jets, the amount of energy that the active nucleus is capable of injecting into the extended medium of the host galaxy remains unknown. The most mysterious component of quasar feedback is the lowest density, hot volume-filling gas. Though there are tentative detections of this component via its thermal...

    Go to contribution page
  69. Mohammadreza Ayromlou (University of Bonn)
    18/07/2025, 15:35
    Feedback in galaxies since cosmic noon
    Talk

    In this talk, I will present the "Beyond" simulation project, a series of hydrodynamical simulations conducted using the AREPO code. I introduce a novel, physically motivated, approach to SMBH feedback, dynamically adjusting feedback efficiency and implementation based on the evolving properties of SMBHs.

    The results reveal how this feedback mechanism shapes the properties of galaxies and...

    Go to contribution page
  70. 18/07/2025, 15:55
    Panel discussion
Building timetable...