The Astronomical Journal (Jan 2024)
High-resolution Dayside Spectroscopy of WASP-189 b: Detection of Iron during the GHOST/Gemini South System Verification Run
- Emily K. Deibert,
- Adam B. Langeveld,
- Mitchell E. Young,
- Laura Flagg,
- Jake D. Turner,
- Peter C. B. Smith,
- Ernst J. W. de Mooij,
- Ray Jayawardhana,
- Kristin Chiboucas,
- Roberto Gamen,
- Christian R. Hayes,
- Jeong-Eun Heo,
- Miji Jeong,
- Venu Kalari,
- Eder Martioli,
- Vinicius M. Placco,
- Siyi Xu,
- Ruben Diaz,
- Manuel Gomez-Jimenez,
- Carlos Quiroz,
- Roque Ruiz-Carmona,
- Chris Simpson,
- Alan W. McConnachie,
- John Pazder,
- Gregory Burley,
- Michael Ireland,
- Fletcher Waller,
- Trystyn A. M. Berg,
- J. Gordon Robertson,
- David O. Jones,
- Kathleen Labrie,
- Susan Ridgway,
- Joanna Thomas-Osip
Affiliations
- Emily K. Deibert
- ORCiD
- Gemini Observatory/NSF’s NOIRLab , Casilla 603, La Serena, Chile ; [email protected]
- Adam B. Langeveld
- ORCiD
- Department of Astronomy and Carl Sagan Institute, Cornell University , Ithaca, NY 14853, USA
- Mitchell E. Young
- ORCiD
- Astrophysics Research Centre, Queen’s University Belfast , Belfast, BT7 1NN, UK
- Laura Flagg
- ORCiD
- Department of Astronomy and Carl Sagan Institute, Cornell University , Ithaca, NY 14853, USA
- Jake D. Turner
- ORCiD
- Department of Astronomy and Carl Sagan Institute, Cornell University , Ithaca, NY 14853, USA
- Peter C. B. Smith
- ORCiD
- School of Earth and Space Exploration, Arizona State University , Tempe, AZ, USA
- Ernst J. W. de Mooij
- ORCiD
- Astrophysics Research Centre, Queen’s University Belfast , Belfast, BT7 1NN, UK
- Ray Jayawardhana
- ORCiD
- Department of Physics and Astronomy, Johns Hopkins University , 3400 N Charles Street, Baltimore, MD 21218, USA
- Kristin Chiboucas
- ORCiD
- Gemini Observatory/NSF’s NOIRLab , 670 N. A’ohoku Place, Hilo, HI 96720, USA
- Roberto Gamen
- ORCiD
- Instituto de Astrofísica de La Plata , CONICET–UNLP, Paseo del Bosque s/n, 1900, La Plata, Argentina
- Christian R. Hayes
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA
- Jeong-Eun Heo
- ORCiD
- Gemini Observatory/NSF’s NOIRLab , Casilla 603, La Serena, Chile ; [email protected]
- Miji Jeong
- Department of Astronomy, Space Science, and Geology, Chungnam National University , Daejeon 34134, Republic of Korea
- Venu Kalari
- ORCiD
- Gemini Observatory/NSF’s NOIRLab , Casilla 603, La Serena, Chile ; [email protected]
- Eder Martioli
- ORCiD
- Laboratório Nacional de Astrofísica , Rua Estados Unidos 154, 37504-364, Itajubá, MG, Brazil
- Vinicius M. Placco
- ORCiD
- NSF’s NOIRLab , Tucson, AZ 85719, USA
- Siyi Xu
- ORCiD
- Gemini Observatory/NSF’s NOIRLab , 670 N. A’ohoku Place, Hilo, HI 96720, USA
- Ruben Diaz
- Gemini Observatory/NSF’s NOIRLab , Casilla 603, La Serena, Chile ; [email protected]
- Manuel Gomez-Jimenez
- Gemini Observatory/NSF’s NOIRLab , Casilla 603, La Serena, Chile ; [email protected]
- Carlos Quiroz
- ORCiD
- Gemini Observatory/NSF’s NOIRLab , Casilla 603, La Serena, Chile ; [email protected]
- Roque Ruiz-Carmona
- ORCiD
- Gemini Observatory/NSF’s NOIRLab , Casilla 603, La Serena, Chile ; [email protected]
- Chris Simpson
- ORCiD
- Gemini Observatory/NSF’s NOIRLab , 670 N. A’ohoku Place, Hilo, HI 96720, USA
- Alan W. McConnachie
- ORCiD
- NRC Herzberg Astronomy and Astrophysics Research Centre , 5071 West Saanich Road, Victoria, B.C., V9E 2E7, Canada
- John Pazder
- NRC Herzberg Astronomy and Astrophysics Research Centre , 5071 West Saanich Road, Victoria, B.C., V9E 2E7, Canada; Department of Physics and Astronomy, University of Victoria , Victoria, BC, V8W 3P2, Canada
- Gregory Burley
- ORCiD
- NRC Herzberg Astronomy and Astrophysics Research Centre , 5071 West Saanich Road, Victoria, B.C., V9E 2E7, Canada
- Michael Ireland
- ORCiD
- Research School of Astronomy and Astrophysics, Australian National University , Canberra 2611, Australia
- Fletcher Waller
- Department of Physics and Astronomy, University of Victoria , Victoria, BC, V8W 3P2, Canada
- Trystyn A. M. Berg
- ORCiD
- NRC Herzberg Astronomy and Astrophysics Research Centre , 5071 West Saanich Road, Victoria, B.C., V9E 2E7, Canada
- J. Gordon Robertson
- ORCiD
- Australian Astronomical Optics, Macquarie University , 105 Delhi Rd, North Ryde NSW 2113, Australia; Sydney Institute for Astronomy, School of Physics, University of Sydney , NSW 2006, Australia
- David O. Jones
- ORCiD
- Gemini Observatory/NSF’s NOIRLab , 670 N. A’ohoku Place, Hilo, HI 96720, USA; Institute for Astronomy, University of Hawai‘i , 640 N. Aohoku Place, Hilo, HI 96720, USA
- Kathleen Labrie
- ORCiD
- Gemini Observatory/NSF’s NOIRLab , 670 N. A’ohoku Place, Hilo, HI 96720, USA
- Susan Ridgway
- NSF’s NOIRLab , Tucson, AZ 85719, USA
- Joanna Thomas-Osip
- ORCiD
- Gemini Observatory/NSF’s NOIRLab , Casilla 603, La Serena, Chile ; [email protected]
- DOI
- https://doi.org/10.3847/1538-3881/ad643f
- Journal volume & issue
-
Vol. 168,
no. 4
p. 148
Abstract
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-189 b obtained with the new Gemini High-resolution Optical SpecTrograph (GHOST) at the Gemini South Observatory. The observations, which cover 3 hr 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.
Keywords
