JWST-TST DREAMS: A Super-Solar Metallicity in WASP-17 b Dayside Atmosphere from NIRISS SOSS Eclipse Spectroscopy
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2024
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866909344439730176 |
|---|---|
| author | Gressier, Amélie MacDonald, Ryan J. Espinoza, Néstor Wakeford, Hannah R. Lewis, Nikole K. Goyal, Jayesh Louie, Dana R. Radica, Michael Batalha, Natasha E. Long, Douglas May, Erin M. Mullens, Elijah Seager, Sara Stevenson, Kevin B. Valenti, Jeff A. Alderson, Lili Allen, Natalie H. Cañas, Caleb I. Challener, Ryan C. Colòn, Knicole Glidden, Ana Grant, David Huang, Jingcheng Lin, Zifan Valentine, Daniel Mountain, C. Matt Pueyo, Laurent Perrin, Marshall D. van der Marel, Roeland P. |
| author_facet | Gressier, Amélie MacDonald, Ryan J. Espinoza, Néstor Wakeford, Hannah R. Lewis, Nikole K. Goyal, Jayesh Louie, Dana R. Radica, Michael Batalha, Natasha E. Long, Douglas May, Erin M. Mullens, Elijah Seager, Sara Stevenson, Kevin B. Valenti, Jeff A. Alderson, Lili Allen, Natalie H. Cañas, Caleb I. Challener, Ryan C. Colòn, Knicole Glidden, Ana Grant, David Huang, Jingcheng Lin, Zifan Valentine, Daniel Mountain, C. Matt Pueyo, Laurent Perrin, Marshall D. van der Marel, Roeland P. |
| contents | We present the first emission spectrum of the hot Jupiter WASP-17 b using one eclipse observation from the JWST Near Infrared Imager and Slitless Spectrograph (NIRISS) Single Object Slitless Spectroscopy (SOSS) mode. Covering a wavelength range of 0.6 to 2.8 microns, our retrieval analysis reveals a strong detection of H2O in WASP-17b dayside atmosphere (6.4sigma). Our retrievals consistently favor a super-solar dayside H2O abundance and a non-inverted temperature-pressure profile over a large pressure range. Additionally, our examination of the brightness temperature reveals excess emission below 1 microns, suggesting the possibility of a high internal temperature (600 to 700 K) and/or contributions from reflected light. We highlight that JWST emission spectroscopy retrieval results can be sensitive to whether negative eclipse depths are allowed at optical wavelengths during light curve fitting. Our findings deepen our understanding of WASP-17b atmospheric composition while also highlighting the sensitivity of our results to pressure-temperature profile parameterizations. This work is part of a series of studies by our JWST Telescope Scientist Team (JWST-TST), in which we will use Guaranteed Time Observations to perform Deep Reconnaissance of Exoplanet Atmospheres through Multi-instrument Spectroscopy (DREAMS). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_08149 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | JWST-TST DREAMS: A Super-Solar Metallicity in WASP-17 b Dayside Atmosphere from NIRISS SOSS Eclipse Spectroscopy Gressier, Amélie MacDonald, Ryan J. Espinoza, Néstor Wakeford, Hannah R. Lewis, Nikole K. Goyal, Jayesh Louie, Dana R. Radica, Michael Batalha, Natasha E. Long, Douglas May, Erin M. Mullens, Elijah Seager, Sara Stevenson, Kevin B. Valenti, Jeff A. Alderson, Lili Allen, Natalie H. Cañas, Caleb I. Challener, Ryan C. Colòn, Knicole Glidden, Ana Grant, David Huang, Jingcheng Lin, Zifan Valentine, Daniel Mountain, C. Matt Pueyo, Laurent Perrin, Marshall D. van der Marel, Roeland P. Earth and Planetary Astrophysics We present the first emission spectrum of the hot Jupiter WASP-17 b using one eclipse observation from the JWST Near Infrared Imager and Slitless Spectrograph (NIRISS) Single Object Slitless Spectroscopy (SOSS) mode. Covering a wavelength range of 0.6 to 2.8 microns, our retrieval analysis reveals a strong detection of H2O in WASP-17b dayside atmosphere (6.4sigma). Our retrievals consistently favor a super-solar dayside H2O abundance and a non-inverted temperature-pressure profile over a large pressure range. Additionally, our examination of the brightness temperature reveals excess emission below 1 microns, suggesting the possibility of a high internal temperature (600 to 700 K) and/or contributions from reflected light. We highlight that JWST emission spectroscopy retrieval results can be sensitive to whether negative eclipse depths are allowed at optical wavelengths during light curve fitting. Our findings deepen our understanding of WASP-17b atmospheric composition while also highlighting the sensitivity of our results to pressure-temperature profile parameterizations. This work is part of a series of studies by our JWST Telescope Scientist Team (JWST-TST), in which we will use Guaranteed Time Observations to perform Deep Reconnaissance of Exoplanet Atmospheres through Multi-instrument Spectroscopy (DREAMS). |
| title | JWST-TST DREAMS: A Super-Solar Metallicity in WASP-17 b Dayside Atmosphere from NIRISS SOSS Eclipse Spectroscopy |
| topic | Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2410.08149 |