MINDS. The Detection of 13CO2 with JWST-MIRI Indicates Abundant CO2 in a Protoplanetary Disk
Artikel i vetenskaplig tidskrift, 2023
We present JWST-MIRI Medium Resolution Spectrometer (MRS) spectra of the protoplanetary disk around the low-mass T Tauri star GW Lup from the MIRI mid-INfrared Disk Survey Guaranteed Time Observations program. Emission from 12CO213CO2, H2O, HCN, C2H2, and OH is identified with 13CO2 being detected for the first time in a protoplanetary disk. We characterize the chemical and physical conditions in the inner few astronomical units of the GW Lup disk using these molecules as probes. The spectral resolution of JWST-MIRI MRS paired with high signal-to-noise data is essential to identify these species and determine their column densities and temperatures. The Q branches of these molecules, including those of hot bands, are particularly sensitive to temperature and column density. We find that the 12CO2 emission in the GW Lup disk is coming from optically thick emission at a temperature of ∼400 K. 13CO2 is optically thinner and based on a lower temperature of ∼325 K, and thus may be tracing deeper into the disk and/or a larger emitting radius than 12CO2. The derived N CO 2 / N H 2 O ratio is orders of magnitude higher than previously derived for GW Lup and other targets based on Spitzer-InfraRed-Spectrograph data. This high column density ratio may be due to an inner cavity with a radius in between the H2O and CO2 snowlines and/or an overall lower disk temperature. This paper demonstrates the unique ability of JWST to probe inner disk structures and chemistry through weak, previously unseen molecular features.
Författare
Sierra L. Grant
Max-Planck-Gesellschaft
Ewine F. van Dishoeck
Universiteit Leiden
Max-Planck-Gesellschaft
Benoît Tabone
Institut d'Astrophysique Spatiale
Danny Gasman
KU Leuven
T. Henning
Max-Planck-Gesellschaft
I. Kamp
Rijksuniversiteit Groningen
M. Gudel
Eidgenössische Technische Hochschule Zürich (ETH)
Max-Planck-Gesellschaft
Universität Wien
P. O. Lagage
Université Paris-Saclay
Giulio Bettoni
Max-Planck-Gesellschaft
G. Perotti
Max-Planck-Gesellschaft
Valentin Christiaens
Universite de Liège
Matthias Samland
Max-Planck-Gesellschaft
Aditya M. Arabhavi
Rijksuniversiteit Groningen
Ioannis Argyriou
KU Leuven
Alain Abergel
Institut d'Astrophysique Spatiale
O. Absil
Universite de Liège
D. Barrado
European Space Astronomy Centre (ESAC)
Anthony Boccaletti
Observatoire de Paris
J. Bouwman
Max-Planck-Gesellschaft
A. Caratti o Garatti
Osservatorio Astronomico di Capodimonte
Dublin Institute for Advanced Studies
V. C. Geers
Royal Observatory
A. M. Glauser
Eidgenössische Technische Hochschule Zürich (ETH)
Rodrigo Guadarrama
Universität Wien
Hyerin Jang
Radboud Universiteit
Jayatee Kanwar
Rijksuniversiteit Groningen
Institut fur Weltraumforschung
F. Lahuis
Netherlands Institute for Space Research (SRON)
M. Morales-Calderon
European Space Astronomy Centre (ESAC)
M. Mueller
Rijksuniversiteit Groningen
Cyrine Nehmé
Université Paris-Saclay
G. Olofsson
Stockholms universitet
E. Pantin
Université Paris-Saclay
Nicole Pawellek
Universität Wien
T. P. Ray
Dublin Institute for Advanced Studies
Donna Rodgers-Lee
Dublin Institute for Advanced Studies
S. Scheithauer
Max-Planck-Gesellschaft
Jürgen Schreiber
Max-Planck-Gesellschaft
Kamber Schwarz
Max-Planck-Gesellschaft
Milou Temmink
Universiteit Leiden
B. Vandenbussche
KU Leuven
Marissa Vlasblom
Universiteit Leiden
L. B.F.M. Waters
Radboud Universiteit
Netherlands Institute for Space Research (SRON)
Gillian Wright
Royal Observatory
L. Colina
Centro de Astrobiologia (CAB)
T. R. Greve
Danmarks Tekniske Universitet (DTU)
Kay Justtanont
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
G. Östlin
Stockholms universitet
Astrophysical Journal Letters
2041-8205 (ISSN) 2041-8213 (eISSN)
Vol. 947 1 L6Ämneskategorier
Astronomi, astrofysik och kosmologi
Atom- och molekylfysik och optik
Den kondenserade materiens fysik
DOI
10.3847/2041-8213/acc44b