Awesome SOSS: transmission spectroscopy of WASP-96b with NIRISS/SOSS-Reference-Cited by-同舟云学术

Awesome SOSS: transmission spectroscopy of WASP-96b with NIRISS/SOSS

Published:2023-06-14 Issue:1 Volume:524 Page:835-856
ISSN:0035-8711
Container-title:Monthly Notices of the Royal Astronomical Society
language:en
Short-container-title:

Author:

Radica Michael¹^ORCID,Welbanks Luis²^ORCID,Espinoza Néstor³⁴^ORCID,Taylor Jake¹⁵^ORCID,Coulombe Louis-Philippe¹^ORCID,Feinstein Adina D⁶^ORCID,Goyal Jayesh⁷^ORCID,Scarsdale Nicholas⁸^ORCID,Albert Loïc¹^ORCID,Baghel Priyanka⁷^ORCID,Bean Jacob L⁶^ORCID,Blecic Jasmina⁹¹⁰^ORCID,Lafrenière David¹^ORCID,MacDonald Ryan J¹¹^ORCID,Zamyatina Maria¹²^ORCID,Allart1 Romain¹^ORCID,Artigau Étienne¹¹³^ORCID,Batalha Natasha E¹⁴^ORCID,Cook Neil James¹^ORCID,Cowan Nicolas B¹⁵¹⁶^ORCID,Dang Lisa¹^ORCID,Doyon René¹¹³^ORCID,Fournier-Tondreau Marylou¹^ORCID,Johnstone Doug¹⁷¹⁸^ORCID,Line Michael R²^ORCID,Moran Sarah E¹⁹^ORCID,Mukherjee Sagnick⁸^ORCID,Pelletier Stefan¹^ORCID,Roy Pierre-Alexis¹^ORCID,Talens Geert Jan²⁰^ORCID,Filippazzo Joseph³^ORCID,Pontoppidan Klaus³^ORCID,Volk Kevin³

Affiliation:

1. Institut Trottier de recherche sur les exoplanètes and Département de Physique, Université de Montréal , 1375 Avenue Thérèse-Lavoie-Roux, Montréal, QC, H2V 0B3 , Canada

2. School of Earth and Space Exploration, Arizona State University , 781 Terrace Mall, Tempe, AZ, 85287 , USA

3. Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218 , USA

4. Department of Physics and Astronomy, Johns Hopkins University , 3400 N Charles St, Baltimore, MD 21218 , USA

5. Department of Physics (Atmospheric, Oceanic and Planetary Physics), University of Oxford , Parks Rd, Oxford OX1 3PU , UK

6. Department of Astronomy & Astrophysics, University of Chicago , 5640 S Ellis Ave, Chicago, IL 60637 , USA

7. School of Earth and Planetary Sciences (SEPS), National Institute of Science Education and Research (NISER), HBNI , Jatani, Odisha 752050 , India

8. Department of Astronomy and Astrophysics, University of California , Santa Cruz, CA 95060 , USA

9. Department of Physics, New York University Abu Dhabi , PO Box 129188 Abu Dhabi , UAE

10. Center for Astro, Particle, and Planetary Physics (CAP3), New York University Abu Dhabi , PO Box 129188 Abu Dhabi , UAE

11. Department of Astronomy, University of Michigan , 1085 S. University Ave., Ann Arbor, MI 48109 , USA

12. Department of Physics and Astronomy, Faculty of Environment, Science and Economy, University of Exeter , Exeter, EX4 4QL , UK

13. Observatoire du Mont-Mégantic, Université de Montréal , Montréal, QC, H3C 3J7 , Canada

14. NASA Ames Research Center , Moffett Field, CA 94035 , USA

15. Department of Physics, McGill University , 3600 rue University, Montréal, QC, H3A 2T8 , Canada

16. Department of Earth and Planetary Sciences, McGill University , 3600 rue University, Montréal, QC, H3A 2T8 , Canada

17. NRC Herzberg Astronomy and Astrophysics , 5071 West Saanich Rd, Victoria, BC, V9E 2E7 , Canada

18. Department of Physics and Astronomy , University of Victoria, Victoria, BC, V8P 5C2 , Canada

19. Department of Planetary Sciences and Lunar and Planetary Laboratory, University of Arizona , Tuscon, AZ 85721 , USA

20. Department of Astrophysical Sciences, Princeton University , 4 Ivy Lane, Princeton, NJ 08544 , USA

Abstract

ABSTRACT The future is now – after its long-awaited launch in 2021 December, JWST began science operations in 2022 July and is already revolutionizing exoplanet astronomy. The Early Release Observations (ERO) programme was designed to provide the first images and spectra from JWST, covering a multitude of science cases and using multiple modes of each on-board instrument. Here, we present transmission spectroscopy observations of the hot-Saturn WASP-96 b with the Single Object Slitless Spectroscopy (SOSS) mode of the Near Infrared Imager and Slitless Spectrograph, observed as part of the ERO programme. As the SOSS mode presents some unique data reduction challenges, we provide an in-depth walk-through of the major steps necessary for the reduction of SOSS data: including background subtraction, correction of 1/f noise, and treatment of the trace order overlap. We furthermore offer potential routes to correct for field star contamination, which can occur due to the SOSS mode’s slitless nature. By comparing our extracted transmission spectrum with grids of atmosphere models, we find an atmosphere metallicity between 1× and 5× solar, and a solar carbon-to-oxygen ratio. Moreover, our models indicate that no grey cloud deck is required to fit WASP-96 b’s transmission spectrum, but find evidence for a slope shortward of 0.9 μm, which could either be caused by enhanced Rayleigh scattering or the red wing of a pressure-broadened Na feature. Our work demonstrates the unique capabilities of the SOSS mode for exoplanet transmission spectroscopy and presents a step-by-step reduction guide for this new and exciting instrument.

Funder

NSERC

FRQNT

NRC

Government of Canada

NASA

Space Telescope Science Institute

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Link