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SUMMARY:Dwarf Properties and Satellite Planes Beyond the Local Volume
DTSTART;VALUE=DATE-TIME:20230323T142200Z
DTEND;VALUE=DATE-TIME:20230323T142400Z
DTSTAMP;VALUE=DATE-TIME:20241114T092451Z
UID:indico-contribution-226@meetings.aip.de
DESCRIPTION:Speakers: Nick Heesters (EPFL)\nDwarf galaxies are regarded as
  the oldest and most numerous galaxy type in the Universe\, responsible fo
 r the formation of the higher mass galaxies we see today. While we know a 
 lot about the properties of dwarfs in the Local Group as well as selected 
 nearby groups and clusters\, our understanding of these galaxies beyond th
 e Local Volume is comparatively poor. The properties probed by this restri
 cted range of locations may be statistically deviant and therefore investi
 gating these objects in a large variety of density environments is critica
 l towards a more complete understanding of galaxy formation and evolution.
  Through the study of dwarfs\, a number of small-scale challenges of the $
 \\Lambda$CDM paradigm have emerged over the years. While issues such as th
 e missing satellite\, the "Too-Big-to-Fail"\, and the cusp-core problem ca
 n increasingly be resolved by including baryonic physics and by altering t
 he properties of dark matter\, the so-called planes-of-satellites problem 
 remains unsolved. Dwarf satellite galaxies in our Milky Way and different 
 galaxy systems in the Local Volume appear to be arranged in thin\, vast pl
 anes. It has been argued that these phase-space correlations can not be ex
 plained to a satisfactory degree by the standard model of cosmology but it
  is unclear whether these planes in our neighborhood are statistical outli
 ers\, or if they are perhaps a common phenomenon in the Universe. Recent d
 eep imaging surveys have significantly increased the number of known dwarf
  galaxies and allow us to advance these tensions beyond the Local Volume. 
 I will present our study analyzing the spatial distribution of 2210 dwarf 
 galaxies identified in the MATLAS survey as well as results from follow-up
  observations with the MUSE instrument on the VLT. Spectral information fo
 r 56 of these dwarf galaxies\, situated in low-to-medium density environme
 nts\, allow for a deeper dive into their properties and for a comparison t
 o the Local Volume dwarfs.\n\nhttps://iaus379.aip.de/event/20/contribution
 s/226/
LOCATION:Haus H\, Telegrafenberg
URL:https://iaus379.aip.de/event/20/contributions/226/
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