Detection of Carbon Monoxide in the Atmosphere of WASP-39b Applying Standard Cross-correlation Techniques to JWST NIRSpec G395H Data
Artikel i vetenskaplig tidskrift, 2023
Carbon monoxide was recently reported in the atmosphere of the hot Jupiter WASP-39b using the NIRSpec PRISM transit observation of this planet, collected as part of the JWST Transiting Exoplanet Community Early Release Science Program. This detection, however, could not be confidently confirmed in the initial analysis of the higher-resolution observations with NIRSpec G395H disperser. Here we confirm the detection of CO in the atmosphere of WASP-39b using the NIRSpec G395H data and cross-correlation techniques. We do this by searching for the CO signal in the unbinned transmission spectrum of the planet between 4.6 and 5.0 μm, where the contribution of CO is expected to be higher than that of other anticipated molecules in the planet’s atmosphere. Our search results in a detection of CO with a cross-correlation function (CCF) significance of 6.6σ when using a template with only 12C16O lines. The CCF significance of the CO signal increases to 7.5σ when including in the template lines from additional CO isotopologues, with the largest contribution being from 13C16O. Our results highlight how cross-correlation techniques can be a powerful tool for unveiling the chemical composition of exoplanetary atmospheres from medium-resolution transmission spectra, including the detection of isotopologues.
Författare
E. Esparza-Borges
Instituto de Astrofísica de Canarias
Universidad de la Laguna
Mercedes López-Morales
Harvard-Smithsonian Center for Astrophysics
Jéa I. Adams Redai
Harvard-Smithsonian Center for Astrophysics
Enric Palle
Universidad de la Laguna
Instituto de Astrofísica de Canarias
J. Kirk
Imperial College London
Núria Casasayas-Barris
Instituto de Astrofísica de Canarias
Natasha E. Batalha
National Aeronautics and Space Administration (NASA)
Benjamin V. Rackham
Massachusetts Institute of Technology (MIT)
Jacob L. Bean
University of Chicago
Sarah Casewell
University Of Leicester
L. Decin
KU Leuven
L. A. Dos Santos
Space Telescope Science Institute (STScI)
Antonio García Muñoz
Université Paris-Saclay
J. Harrington
University of Central Florida
Kevin Heng
Ludwig-Maximilians-Universität München (LMU)
Renyu Hu
California Institute of Technology (Caltech)
L. Mancini
Max-Planck-Gesellschaft
Istituto nazionale di astrofisica (INAF)
Universita degli Studi di Roma Tor Vergata
K. Molaverdikhani
Ludwig-Maximilians-Universität München (LMU)
Giuseppe Morello
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
Instituto de Astrofísica de Canarias
Nikolay K. Nikolov
Space Telescope Science Institute (STScI)
M. C. Nixon
University of Maryland
S. Redfield
Wesleyan University
Kevin B. Stevenson
Johns Hopkins University
Hannah R. Wakeford
University of Bristol
Munazza K. Alam
Carnegie Observatories
B. Benneke
Université de Montréal
Jasmina Blecic
New York University Abu Dhabi
N. Crouzet
Universiteit Leiden
Tansu Daylan
Princeton University
Julie Inglis
California Institute of Technology (Caltech)
L. Kreidberg
Max-Planck-Gesellschaft
Dominique J.M. Petit dit de la Roche
Université de Genève
Jake D. Turner
Cornell University
Astrophysical Journal Letters
2041-8205 (ISSN) 2041-8213 (eISSN)
Vol. 955 1 L19Ämneskategorier (SSIF 2011)
Astronomi, astrofysik och kosmologi
Annan elektroteknik och elektronik
DOI
10.3847/2041-8213/acf27b