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1811004205921468416
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Massachusetts Institute of Technology. Department of Physics
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Massachusetts Institute of Technology. Department of Physics
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MIT
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© 2020. The American Astronomical Society. All rights reserved. We present Spitzer 4.5 μm observations of the transit of TOI-700 d, a habitable-zone Earth-sized planet in a multiplanet system transiting a nearby M-dwarf star (TIC 150428135, 2MASS J06282325-6534456). TOI-700 d has a radius of 1.144-0.061+0.062R⊕ and orbits within its host star's conservative habitable zone with a period of 37.42 days (T eq ∼ 269 K). TOI-700 also hosts two small inner planets (R b = 1.037-0.064+0.065R⊕and R c = 2.65-0.15+0.16R⊕) with periods of 9.98 and 16.05 days, respectively. Our Spitzer observations confirm the Transiting Exoplanet Survey Satellite (TESS) detection of TOI-700 d and remove any remaining doubt that it is a genuine planet. We analyze the Spitzer light curve combined with the 11 sectors of TESS observations and a transit of TOI-700 c from the LCOGT network to determine the full system parameters. Although studying the atmosphere of TOI-700 d is not likely feasible with upcoming facilities, it may be possible to measure the mass of TOI-700 d using state-of-the-art radial velocity (RV) instruments (expected RV semiamplitude of ∼70 cm s-1).
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2024-09-23T16:16:38Z
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Article
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mit-1721.1/134324.2
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Massachusetts Institute of Technology
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English
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2024-09-23T16:16:38Z
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2022
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American Astronomical Society
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dspace
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mit-1721.1/134324.22024-02-23T21:26:39Z The First Habitable-zone Earth-sized Planet from TESS. II. Spitzer Confirms TOI-700 d Massachusetts Institute of Technology. Department of Physics MIT Kavli Institute for Astrophysics and Space Research Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences © 2020. The American Astronomical Society. All rights reserved. We present Spitzer 4.5 μm observations of the transit of TOI-700 d, a habitable-zone Earth-sized planet in a multiplanet system transiting a nearby M-dwarf star (TIC 150428135, 2MASS J06282325-6534456). TOI-700 d has a radius of 1.144-0.061+0.062R⊕ and orbits within its host star's conservative habitable zone with a period of 37.42 days (T eq ∼ 269 K). TOI-700 also hosts two small inner planets (R b = 1.037-0.064+0.065R⊕and R c = 2.65-0.15+0.16R⊕) with periods of 9.98 and 16.05 days, respectively. Our Spitzer observations confirm the Transiting Exoplanet Survey Satellite (TESS) detection of TOI-700 d and remove any remaining doubt that it is a genuine planet. We analyze the Spitzer light curve combined with the 11 sectors of TESS observations and a transit of TOI-700 c from the LCOGT network to determine the full system parameters. Although studying the atmosphere of TOI-700 d is not likely feasible with upcoming facilities, it may be possible to measure the mass of TOI-700 d using state-of-the-art radial velocity (RV) instruments (expected RV semiamplitude of ∼70 cm s-1). 2022-01-18T16:47:12Z 2021-10-27T20:04:27Z 2022-01-18T16:47:12Z 2020-08 2020-05 2021-09-30T11:43:36Z Article http://purl.org/eprint/type/JournalArticle 1538-3881 https://hdl.handle.net/1721.1/134324.2 en http://dx.doi.org/10.3847/1538-3881/ABA4B3 Astronomical Journal Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/octet-stream American Astronomical Society The American Astronomical Society
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| spellingShingle |
The First Habitable-zone Earth-sized Planet from TESS. II. Spitzer Confirms TOI-700 d
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| title |
The First Habitable-zone Earth-sized Planet from TESS. II. Spitzer Confirms TOI-700 d
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| title_full |
The First Habitable-zone Earth-sized Planet from TESS. II. Spitzer Confirms TOI-700 d
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| title_fullStr |
The First Habitable-zone Earth-sized Planet from TESS. II. Spitzer Confirms TOI-700 d
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| title_full_unstemmed |
The First Habitable-zone Earth-sized Planet from TESS. II. Spitzer Confirms TOI-700 d
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| title_short |
The First Habitable-zone Earth-sized Planet from TESS. II. Spitzer Confirms TOI-700 d
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| title_sort |
first habitable zone earth sized planet from tess ii spitzer confirms toi 700 d
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| url |
https://hdl.handle.net/1721.1/134324.2
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