High-Resolution Dayside Spectroscopy of WASP-189b: Detection of Iron during the GHOST/Gemini South System Verification Run
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2024
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| author | Deibert, Emily K. Langeveld, Adam B. Young, Mitchell E. Flagg, Laura Turner, Jake D. Smith, Peter C. B. de Mooij, Ernst J. W. Jayawardhana, Ray Chiboucas, Kristin Gamen, Roberto Hayes, Christian R. Heo, Jeong-Eun Jeong, Miji Kalari, Venu Martioli, Eder Placco, Vinicius M. Xu, Siyi Diaz, Ruben Gomez-Jimenez, Manuel Quiroz, Carlos Ruiz-Carmona, Roque Simpson, Chris McConnachie, Alan W. Pazder, John Burley, Gregory Ireland, Michael Waller, Fletcher Berg, Trystyn A. M. Robertson, J. Gordon Jones, David O. Labrie, Kathleen Ridgway, Susan Thomas-Osip, Joanna |
| author_facet | Deibert, Emily K. Langeveld, Adam B. Young, Mitchell E. Flagg, Laura Turner, Jake D. Smith, Peter C. B. de Mooij, Ernst J. W. Jayawardhana, Ray Chiboucas, Kristin Gamen, Roberto Hayes, Christian R. Heo, Jeong-Eun Jeong, Miji Kalari, Venu Martioli, Eder Placco, Vinicius M. Xu, Siyi Diaz, Ruben Gomez-Jimenez, Manuel Quiroz, Carlos Ruiz-Carmona, Roque Simpson, Chris McConnachie, Alan W. Pazder, John Burley, Gregory Ireland, Michael Waller, Fletcher Berg, Trystyn A. M. Robertson, J. Gordon Jones, David O. Labrie, Kathleen Ridgway, Susan Thomas-Osip, Joanna |
| contents | With high equilibrium temperatures and tidally locked rotation, ultra-hot Jupiters (UHJs) are unique laboratories within which to probe extreme atmospheric physics and chemistry. In this paper, we present high-resolution dayside spectroscopy of the UHJ WASP-189b obtained with the new Gemini High-resolution Optical SpecTrograph (GHOST) at the Gemini South Observatory. The observations, which cover three hours of post-eclipse orbital phases, were obtained during the instrument's System Verification run. We detect the planet's atmosphere via the Doppler cross-correlation technique, and recover a detection of neutral iron in the planet's dayside atmosphere at a significance of 7.5$σ$ in the red-arm of the data, verifying the presence of a thermal inversion. We also investigate the presence of other species in the atmosphere and discuss the implications of model injection/recovery tests. These results represent the first atmospheric characterization of an exoplanet with GHOST's high-resolution mode, and demonstrate the potential of this new instrument in detecting and studying ultra-hot exoplanet atmospheres. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_11281 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | High-Resolution Dayside Spectroscopy of WASP-189b: Detection of Iron during the GHOST/Gemini South System Verification Run Deibert, Emily K. Langeveld, Adam B. Young, Mitchell E. Flagg, Laura Turner, Jake D. Smith, Peter C. B. de Mooij, Ernst J. W. Jayawardhana, Ray Chiboucas, Kristin Gamen, Roberto Hayes, Christian R. Heo, Jeong-Eun Jeong, Miji Kalari, Venu Martioli, Eder Placco, Vinicius M. Xu, Siyi Diaz, Ruben Gomez-Jimenez, Manuel Quiroz, Carlos Ruiz-Carmona, Roque Simpson, Chris McConnachie, Alan W. Pazder, John Burley, Gregory Ireland, Michael Waller, Fletcher Berg, Trystyn A. M. Robertson, J. Gordon Jones, David O. Labrie, Kathleen Ridgway, Susan Thomas-Osip, Joanna Earth and Planetary Astrophysics With high equilibrium temperatures and tidally locked rotation, ultra-hot Jupiters (UHJs) are unique laboratories within which to probe extreme atmospheric physics and chemistry. In this paper, we present high-resolution dayside spectroscopy of the UHJ WASP-189b obtained with the new Gemini High-resolution Optical SpecTrograph (GHOST) at the Gemini South Observatory. The observations, which cover three hours of post-eclipse orbital phases, were obtained during the instrument's System Verification run. We detect the planet's atmosphere via the Doppler cross-correlation technique, and recover a detection of neutral iron in the planet's dayside atmosphere at a significance of 7.5$σ$ in the red-arm of the data, verifying the presence of a thermal inversion. We also investigate the presence of other species in the atmosphere and discuss the implications of model injection/recovery tests. These results represent the first atmospheric characterization of an exoplanet with GHOST's high-resolution mode, and demonstrate the potential of this new instrument in detecting and studying ultra-hot exoplanet atmospheres. |
| title | High-Resolution Dayside Spectroscopy of WASP-189b: Detection of Iron during the GHOST/Gemini South System Verification Run |
| topic | Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2407.11281 |