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SUMMARY:Characterizing the atmosphere of the warm Neptune HAT-P-11 b with 
 high resolution spectroscopy
DTSTART;VALUE=DATE-TIME:20220908T101500Z
DTEND;VALUE=DATE-TIME:20220908T103000Z
DTSTAMP;VALUE=DATE-TIME:20240704T115918Z
UID:indico-contribution-119@meetings.aip.de
DESCRIPTION:Speakers: Fabio Lesjak (Institut für Astrophysik und Geophysi
 k Göttingen)\nHigh resolution spectra of transit events enable the search
  for constituents in exoplanet atmospheres with a variety of methods.\nUsi
 ng cross correlation\, the observations can be compared to models across a
  wide wavelength range\, taking advantage of the large number of absorptio
 n lines of some species. For other species\, the excess absorption in stro
 ng individual lines is measurable directly by comparing the spectra taken 
 during the transit with those before and after the transit. We analyze tra
 nsmission spectra of HAT-P-11 b obtained with CARMENES using these two met
 hods to search for a multitude of species in the planetary atmosphere. We 
 remove stellar and telluric lines with SYSREM and find a detection of CH$_
 4$ using cross correlation. In addition\, we confirm the previously detect
 ed presence of He by examining the near-infrared helium triplet. Helium is
  known to be a tracer for extended atmospheres and to be related to stella
 r activity. The large eccentricity of HAT-P-11 b's orbit helps to disentan
 gle the planetary from the stellar absorption lines. Furthermore\, we sear
 ch for other species that are expected to be present in the atmosphere of 
 warm Neptunes.\n\nhttps://meetings.aip.de/event/16/contributions/119/
LOCATION:Leibniz Institute for Astrophysics Potsdam (AIP) Lecture Hall
URL:https://meetings.aip.de/event/16/contributions/119/
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