The HUSTLE Program: The UV to Near-Infrared HST WFC3/UVIS G280 Transmission Spectrum of WASP-127b
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , |
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| Natura: | Preprint |
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2024
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| author | Boehm, V. A. Lewis, N. K. Fairman, C. E. Moran, S. E. Gascón, C. Wakeford, H. R. Alam, M. K. Alderson, L. Barstow, J. Batalha, N. E. Grant, D. López-Morales, M. MacDonald, R. J. Marley, M. S. Ohno, K. |
| author_facet | Boehm, V. A. Lewis, N. K. Fairman, C. E. Moran, S. E. Gascón, C. Wakeford, H. R. Alam, M. K. Alderson, L. Barstow, J. Batalha, N. E. Grant, D. López-Morales, M. MacDonald, R. J. Marley, M. S. Ohno, K. |
| contents | Ultraviolet wavelengths offer unique insights into aerosols in exoplanetary atmospheres. However, only a handful of exoplanets have been observed in the ultraviolet to date. Here, we present the ultraviolet-visible transmission spectrum of the inflated hot Jupiter WASP-127b. We observed one transit of WASP-127b with WFC3/UVIS G280 as part of the Hubble Ultraviolet-optical Survey of Transiting Legacy Exoplanets (HUSTLE), obtaining a transmission spectrum from 200-800 nm. Our reductions yielded a broad-band transit depth precision of 91 ppm and a median precision of 240 ppm across 59 spectral channels. Our observations are suggestive of a high-altitude cloud layer with forward modeling showing they are composed of sub-micron particles and retrievals indicating a high opacity patchy cloud. While our UVIS/G280 data only offers weak evidence for Na, adding archival HST WFC3/IR and STIS observations raises the overall Na detection significance to 4.1-sigma. Our work demonstrates the capabilities of HST WFC3/UVIS G280 observations to probe the aerosols and atmospheric composition of transiting hot Jupiters with comparable precision to HST STIS. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_17368 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The HUSTLE Program: The UV to Near-Infrared HST WFC3/UVIS G280 Transmission Spectrum of WASP-127b Boehm, V. A. Lewis, N. K. Fairman, C. E. Moran, S. E. Gascón, C. Wakeford, H. R. Alam, M. K. Alderson, L. Barstow, J. Batalha, N. E. Grant, D. López-Morales, M. MacDonald, R. J. Marley, M. S. Ohno, K. Earth and Planetary Astrophysics Ultraviolet wavelengths offer unique insights into aerosols in exoplanetary atmospheres. However, only a handful of exoplanets have been observed in the ultraviolet to date. Here, we present the ultraviolet-visible transmission spectrum of the inflated hot Jupiter WASP-127b. We observed one transit of WASP-127b with WFC3/UVIS G280 as part of the Hubble Ultraviolet-optical Survey of Transiting Legacy Exoplanets (HUSTLE), obtaining a transmission spectrum from 200-800 nm. Our reductions yielded a broad-band transit depth precision of 91 ppm and a median precision of 240 ppm across 59 spectral channels. Our observations are suggestive of a high-altitude cloud layer with forward modeling showing they are composed of sub-micron particles and retrievals indicating a high opacity patchy cloud. While our UVIS/G280 data only offers weak evidence for Na, adding archival HST WFC3/IR and STIS observations raises the overall Na detection significance to 4.1-sigma. Our work demonstrates the capabilities of HST WFC3/UVIS G280 observations to probe the aerosols and atmospheric composition of transiting hot Jupiters with comparable precision to HST STIS. |
| title | The HUSTLE Program: The UV to Near-Infrared HST WFC3/UVIS G280 Transmission Spectrum of WASP-127b |
| topic | Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2410.17368 |