TESS Reveals a short-period sub-neptune sibling (HD 86226c) to a known long-period giant planet
Author
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Teske, Johanna
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Díaz, Matías R.
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Luque, Rafael
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Močnik, Teo
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Seidel, Julia V.
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Fernández Otegi, Jon
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Feng, Fabo
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Jenkins, James S.
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Pallè, Enric
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Ségransan, Demien
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Udry, Stéphane
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Collins, Karen A.
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Eastman, Jason D.
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Ricker, George R.
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Vanderspek, Roland
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Latham, David W.
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Seager, Sara
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Winn, Joshua N.
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Jenkins, Jon M.
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Anderson, David R.
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Barclay, Thomas
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Bouchy, François
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Burt, Jennifer A.
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Paul Butler, R.
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Caldwell, Douglas A.
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Collins, Kevin I.
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Crane, Jeffrey D.
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Dorn, Caroline
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Flowers, Erin
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Haldemann, Jonás
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Helled, Ravit
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Hellier, Coel
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Jensen, Eric L. N.
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Kane, Stephen R.
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Law, Nicholas
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Lissauer, Jack J.
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Mann, Andrew W.
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Marmier, Maxime
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Nielsen, Louise Dyregaard
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Rose, Mark E.
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Shectman, Stephen A.
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Shporer, Avi
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Torres, Guillermo
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Wang, Sharon
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Wolfgang, Angie
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Wong, Ian
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Ziegler, Carl
Admission date
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2021-08-24T23:06:05Z
Available date
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2021-08-24T23:06:05Z
Publication date
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2020
Cita de ítem
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The Astronomical Journal, 160:96 (17pp), 2020 August
es_ES
Identifier
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10.3847/1538-3881/ab9f95
Identifier
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https://repositorio.uchile.cl/handle/2250/181517
Abstract
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The Transiting Exoplanet Survey Satellite mission was designed to find transiting planets around bright, nearby
stars. Here, we present the detection and mass measurement of a small, short-period (≈4 days) transiting planet
around the bright (V=7.9), solar-type star HD 86226 (TOI-652, TIC 22221375), previously known to host a
long-period (∼1600 days) giant planet. HD 86226c (TOI-652.01) has a radius of 2.16±0.08R⊕ and a mass of
-
7.25+1.12
1.19 M⊕, based on archival and new radial velocity data. We also update the parameters of the longer-period,
not-known-to-transit planet, and find it to be less eccentric and less massive than previously reported. The density
of the transiting planet is 3.97 gcm−3, which is low enough to suggest that the planet has at least a small volatile
envelope, but the mass fractions of rock, iron, and water are not well-constrained. Given the host star brightness,
planet period, and location of the planet near both the “radius gap” and the “hot Neptune desert,” HD 86226c is an
interesting candidate for transmission spectroscopy to further refine its composition.
es_ES
Patrocinador
dc.description.sponsorship
NASA's Science Mission directorate
NASA through Hubble Fellowship grant - Space Telescope Science Institute HST-HF2-51399.001
National Aeronautics & Space Administration (NASA) NAS5-26555
18-XRP18_2-0048
CONICYT-PFCHA/Doctorado Nacional, Chile 21140646
European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant 713673
"la Caixa" INPhINIT Fellowship grant LCF/BQ/IN17/11620033
European Research Council (ERC) 724427
Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)
CONICYT FONDECYT 1161218
Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) Basal AFB-170002
Spanish Ministry of Economics and Competitiveness PGC2018-098153-B-C31
Heising-Simons Foundation
Swiss National Science Foundation (SNSF)
European Commission 200020_172746
National Aeronautics & Space Administration (NASA)