The First Near-infrared Transmission Spectrum of HIP 41378 f, A Low-mass Temperate Jovian World in a Multiplanet System
<jats:title>Abstract</jats:title> <jats:p>We present a near-infrared transmission spectrum of the long-period (<jats:italic>P</jats:italic> = 542 days), temperate (<jats:italic>T</jats:italic> <jats:sub>eq</jats:su...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Astronomical Society
2022
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| Online Access: | https://hdl.handle.net/1721.1/142263 |
| _version_ | 1826207670198075392 |
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| author | Alam, Munazza K Kirk, James Dressing, Courtney D López-Morales, Mercedes Ohno, Kazumasa Gao, Peter Akinsanmi, Babatunde Santerne, Alexandre Grouffal, Salomé Adibekyan, Vardan Barros, Susana CC Buchhave, Lars A Crossfield, Ian JM Dai, Fei Deleuil, Magali Giacalone, Steven Lillo-Box, Jorge Marley, Mark Mayo, Andrew W Mortier, Annelies Santos, Nuno C Sousa, Sérgio G Turtelboom, Emma V Wheatley, Peter J Vanderburg, Andrew M |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Alam, Munazza K Kirk, James Dressing, Courtney D López-Morales, Mercedes Ohno, Kazumasa Gao, Peter Akinsanmi, Babatunde Santerne, Alexandre Grouffal, Salomé Adibekyan, Vardan Barros, Susana CC Buchhave, Lars A Crossfield, Ian JM Dai, Fei Deleuil, Magali Giacalone, Steven Lillo-Box, Jorge Marley, Mark Mayo, Andrew W Mortier, Annelies Santos, Nuno C Sousa, Sérgio G Turtelboom, Emma V Wheatley, Peter J Vanderburg, Andrew M |
| author_sort | Alam, Munazza K |
| collection | MIT |
| description | <jats:title>Abstract</jats:title>
<jats:p>We present a near-infrared transmission spectrum of the long-period (<jats:italic>P</jats:italic> = 542 days), temperate (<jats:italic>T</jats:italic>
<jats:sub>eq</jats:sub> = 294 K) giant planet HIP 41378 f obtained with the Wide-Field Camera 3 instrument aboard the Hubble Space Telescope (HST). With a measured mass of 12 ± 3 <jats:italic>M</jats:italic>
<jats:sub>⊕</jats:sub> and a radius of 9.2 ± 0.1 <jats:italic>R</jats:italic>
<jats:sub>⊕</jats:sub>, HIP 41378 f has an extremely low bulk density (0.09 ± 0.02 g cm<jats:sup>−3</jats:sup>). We measure the transit depth with a median precision of 84 ppm in 30 spectrophotometric channels with uniformly sized widths of 0.018 <jats:italic>μ</jats:italic>m. Within this level of precision, the spectrum shows no evidence of absorption from gaseous molecular features between 1.1 and 1.7 <jats:italic>μ</jats:italic>m. Comparing the observed transmission spectrum to a suite of 1D radiative-convective-thermochemical-equilibrium forward models, we rule out clear, low-metallicity atmospheres and find that the data prefer high-metallicity atmospheres or models with an additional opacity source, such as high-altitude hazes and/or circumplanetary rings. We explore the ringed scenario for HIP 41378 f further by jointly fitting the K2 and HST light curves to constrain the properties of putative rings. We also assess the possibility of distinguishing between hazy, ringed, and high-metallicity scenarios at longer wavelengths with the James Webb Space Telescope. HIP 41378 f provides a rare opportunity to probe the atmospheric composition of a cool giant planet spanning the gap in temperature, orbital separation, and stellar irradiation between the solar system giants, directly imaged planets, and the highly irradiated hot Jupiters traditionally studied via transit spectroscopy.</jats:p> |
| first_indexed | 2024-09-23T13:53:07Z |
| format | Article |
| id | mit-1721.1/142263 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T13:53:07Z |
| publishDate | 2022 |
| publisher | American Astronomical Society |
| record_format | dspace |
| spelling | mit-1721.1/1422632023-06-20T17:08:01Z The First Near-infrared Transmission Spectrum of HIP 41378 f, A Low-mass Temperate Jovian World in a Multiplanet System Alam, Munazza K Kirk, James Dressing, Courtney D López-Morales, Mercedes Ohno, Kazumasa Gao, Peter Akinsanmi, Babatunde Santerne, Alexandre Grouffal, Salomé Adibekyan, Vardan Barros, Susana CC Buchhave, Lars A Crossfield, Ian JM Dai, Fei Deleuil, Magali Giacalone, Steven Lillo-Box, Jorge Marley, Mark Mayo, Andrew W Mortier, Annelies Santos, Nuno C Sousa, Sérgio G Turtelboom, Emma V Wheatley, Peter J Vanderburg, Andrew M Massachusetts Institute of Technology. Department of Physics MIT Kavli Institute for Astrophysics and Space Research <jats:title>Abstract</jats:title> <jats:p>We present a near-infrared transmission spectrum of the long-period (<jats:italic>P</jats:italic> = 542 days), temperate (<jats:italic>T</jats:italic> <jats:sub>eq</jats:sub> = 294 K) giant planet HIP 41378 f obtained with the Wide-Field Camera 3 instrument aboard the Hubble Space Telescope (HST). With a measured mass of 12 ± 3 <jats:italic>M</jats:italic> <jats:sub>⊕</jats:sub> and a radius of 9.2 ± 0.1 <jats:italic>R</jats:italic> <jats:sub>⊕</jats:sub>, HIP 41378 f has an extremely low bulk density (0.09 ± 0.02 g cm<jats:sup>−3</jats:sup>). We measure the transit depth with a median precision of 84 ppm in 30 spectrophotometric channels with uniformly sized widths of 0.018 <jats:italic>μ</jats:italic>m. Within this level of precision, the spectrum shows no evidence of absorption from gaseous molecular features between 1.1 and 1.7 <jats:italic>μ</jats:italic>m. Comparing the observed transmission spectrum to a suite of 1D radiative-convective-thermochemical-equilibrium forward models, we rule out clear, low-metallicity atmospheres and find that the data prefer high-metallicity atmospheres or models with an additional opacity source, such as high-altitude hazes and/or circumplanetary rings. We explore the ringed scenario for HIP 41378 f further by jointly fitting the K2 and HST light curves to constrain the properties of putative rings. We also assess the possibility of distinguishing between hazy, ringed, and high-metallicity scenarios at longer wavelengths with the James Webb Space Telescope. HIP 41378 f provides a rare opportunity to probe the atmospheric composition of a cool giant planet spanning the gap in temperature, orbital separation, and stellar irradiation between the solar system giants, directly imaged planets, and the highly irradiated hot Jupiters traditionally studied via transit spectroscopy.</jats:p> 2022-05-03T18:47:01Z 2022-05-03T18:47:01Z 2022-03-01 2022-05-03T18:41:05Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/142263 Alam, Munazza K, Kirk, James, Dressing, Courtney D, López-Morales, Mercedes, Ohno, Kazumasa et al. 2022. "The First Near-infrared Transmission Spectrum of HIP 41378 f, A Low-mass Temperate Jovian World in a Multiplanet System." The Astrophysical Journal Letters, 927 (1). en 10.3847/2041-8213/ac559d The Astrophysical Journal Letters Creative Commons Attribution 4.0 International License https://creativecommons.org/licenses/by/4.0 application/pdf American Astronomical Society American Astronomical Society |
| spellingShingle | Alam, Munazza K Kirk, James Dressing, Courtney D López-Morales, Mercedes Ohno, Kazumasa Gao, Peter Akinsanmi, Babatunde Santerne, Alexandre Grouffal, Salomé Adibekyan, Vardan Barros, Susana CC Buchhave, Lars A Crossfield, Ian JM Dai, Fei Deleuil, Magali Giacalone, Steven Lillo-Box, Jorge Marley, Mark Mayo, Andrew W Mortier, Annelies Santos, Nuno C Sousa, Sérgio G Turtelboom, Emma V Wheatley, Peter J Vanderburg, Andrew M The First Near-infrared Transmission Spectrum of HIP 41378 f, A Low-mass Temperate Jovian World in a Multiplanet System |
| title | The First Near-infrared Transmission Spectrum of HIP 41378 f, A Low-mass Temperate Jovian World in a Multiplanet System |
| title_full | The First Near-infrared Transmission Spectrum of HIP 41378 f, A Low-mass Temperate Jovian World in a Multiplanet System |
| title_fullStr | The First Near-infrared Transmission Spectrum of HIP 41378 f, A Low-mass Temperate Jovian World in a Multiplanet System |
| title_full_unstemmed | The First Near-infrared Transmission Spectrum of HIP 41378 f, A Low-mass Temperate Jovian World in a Multiplanet System |
| title_short | The First Near-infrared Transmission Spectrum of HIP 41378 f, A Low-mass Temperate Jovian World in a Multiplanet System |
| title_sort | first near infrared transmission spectrum of hip 41378 f a low mass temperate jovian world in a multiplanet system |
| url | https://hdl.handle.net/1721.1/142263 |
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