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SUMMARY:Consistent relative abundance constraints from multiple high-resol
 ution transmission spectroscopy observations of WASP-121b
DTSTART;VALUE=DATE-TIME:20220907T101500Z
DTEND;VALUE=DATE-TIME:20220907T103000Z
DTSTAMP;VALUE=DATE-TIME:20240704T115908Z
UID:indico-contribution-141@meetings.aip.de
DESCRIPTION:Speakers: Cathal Maguire (Trinity College Dublin)\nHigh-resolu
 tion transmission spectroscopy has opened new avenues in which to characte
 rise the atmospheres of exoplanets. This technique has been used to unambi
 guously identify chemical species\, map longitudinal variations in their a
 bundance across the morning and evening limbs\, as well as to infer atmosp
 heric dynamics. We present multiple high-resolution transmission spectrosc
 opy observations of the ultra-hot Jupiter WASP-121b\, using the ESPRESSO s
 pectrograph at the VLT\, across which we consistently constrain the relati
 ve abundances of various neutral metals in its atmosphere. This is done vi
 a the cross-correlation technique\, in which our observations are cross-co
 rrelated with Doppler shifted model transmission spectra. This cross-corre
 lation value is then “mapped” to a likelihood value\, which can then b
 e folded into a Bayesian retrieval framework. From these retrievals\, we c
 an constrain atmospheric properties such as a species volume mixing ratio\
 , the vertical T-P profile of the atmosphere\, and atmospheric dynamic par
 ameters which are then used to infer the planet’s orbital velocity\, as 
 well as offsets caused by winds and rotation. By constraining the relative
  abundance of species in a planet’s atmosphere\, we can determine the pl
 anet’s bulk composition\, and ultimately infer the planet’s formation 
 and evolution mechanisms.\n\nhttps://meetings.aip.de/event/16/contribution
 s/141/
LOCATION:Leibniz Institute for Astrophysics Potsdam (AIP) Lecture Hall
URL:https://meetings.aip.de/event/16/contributions/141/
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