| Title: |
ARES V: No evidence for molecular absorption in the HST WFC3 spectrum of GJ 1132 b |
| Authors: |
Mugnai, Lorenzo; Modirrousta-Galian, Darius; Edwards, Billy; Changeat, Quentin; Bouwman, Jeroen; Morello, Giuseppe; Al-Refaie, Ahmed; Baeyens, Robin; Bieger, Michelle Fabienne; Blain, Doriann; Gressier, Amélie; Guilluy, Gloria; Jaziri, Yassin; Kiefer, Flavien; Morvan, Mario; Pluriel, William; Poveda, Mathilde; Skaf, Nour; Whiteford, Niall; Wright, Sam; Yip, Kai Hou; Zingales, Tiziano; Charnay, Benjamin; Drossart, Pierre; Leconte, Jérémy; Venot, Olivia; Waldmann, Ingo; Beaulieu, Jean-Philippe |
| Contributors: |
Dipartimento di Fisica Roma La Sapienza; Università degli Studi di Roma "La Sapienza" = Sapienza University Rome (UNIROMA); INAF - Osservatorio Astronomico di Palermo (OAPa); Istituto Nazionale di Astrofisica Rome (INAF); Dipartimento di Fisica e Chimica Palermo (DiFC); Università degli studi di Palermo - University of Palermo (UNIPA); Department of Physics and Astronomy UCL London; University College London UCL (UCL); Max-Planck-Institut für Astronomie = Max Planck Institute for Astronomy (MPIA); Max-Planck-Gesellschaft; Instituto de Astrofisica de Canarias (IAC); Institute of Astronomy Leuven; Catholic University of Leuven = Katholieke Universiteit Leuven (KU Leuven); College of Engineering, Mathematics and Physical Sciences Exeter (EMPS); University of Exeter; Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA); Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris; Centre National de la Recherche Scientifique (CNRS)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Sciences et Lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité); Institut d'Astrophysique de Paris (IAP); Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS); PLANETO - LATMOS; Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS); Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS); Dipartimento di Fisica Torino; Università degli studi di Torino = University of Turin (UNITO); INAF - Osservatorio Astrofisico di Torino (OATo); Laboratoire d'Astrophysique de Bordeaux Pessac (LAB); Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS); Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)); Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité); Maison de la Simulation (MDLS); Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut National de Recherche en Informatique et en Automatique (Inria)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS); Subaru Telescope; National Astronomical Observatory of Japan (NAOJ); Institute for Astronomy Edinburgh (IfA); The University of Edinburgh; Centre for Exoplanet Science; School of Physical Sciences Hobart; University of Tasmania Hobart (UTAS); European Union’s Horizon 2020 research and innovation program under the Marie SkłodowskaCurie grant agreement No. 895525.; ANR-16-CE31-0005,e-PYTHEAS,Etude des hydrocarbures en émission et absorption dasn les exoplanètes à haute température(2016); European Project: 776403,H2020-COMPET-2017,H2020-COMPET-2017,ExoplANETS A(2018); European Project: 757858,ERC-2017-STG,ERC-2017-STG,ATMO(2018) |
| Source: |
ISSN: 0004-6256. |
| Publisher Information: |
CCSD; American Astronomical Society |
| Publication Year: |
2021 |
| Collection: |
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
| Subject Terms: |
[SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] |
| Description: |
International audience ; We present a study on the spatially scanned spectroscopic observations of the transit of GJ 1132 b, a warm (∼500 K) super-Earth (1.13 R⊕) that was obtained with the G141 grism (1.125–1.650 μm) of the Wide Field Camera 3 (WFC3) on board the Hubble Space Telescope. We used the publicly available Iraclis pipeline to extract the planetary transmission spectra from the five visits and produced a precise transmission spectrum. We analyzed the spectrum using the TauREx3 atmospheric retrieval code, with which we show that the measurements do not contain molecular signatures in the investigated wavelength range and are best fit with a flat-line model. Our results suggest that the planet does not have a clear primordial, hydrogen-dominated atmosphere. Instead, GJ 1132 b could have a cloudy hydrogen-dominated atmosphere, have a very enriched secondary atmosphere, be airless, or have a tenuous atmosphere that has not been detected. Due to the narrow wavelength coverage of WFC3, these scenarios cannot be distinguished yet, but the James Webb Space Telescope may be capable of detecting atmospheric features, although several observations may be required to provide useful constraints. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
info:eu-repo/semantics/altIdentifier/arxiv/2104.01873; info:eu-repo/grantAgreement//776403/EU/Exoplanet Athmosphere New Emission Transmission Spectra Analysis/ExoplANETS A; info:eu-repo/grantAgreement//757858/EU/Atmospheres across the Universe/ATMO; ARXIV: 2104.01873 |
| DOI: |
10.3847/1538-3881/abf3c3 |
| Availability: |
https://hal.science/hal-03277507; https://hal.science/hal-03277507v1/document; https://hal.science/hal-03277507v1/file/2104.01873.pdf; https://doi.org/10.3847/1538-3881/abf3c3 |
| Rights: |
https://about.hal.science/hal-authorisation-v1/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.EDDAA9B1 |
| Database: |
BASE |