No Transits of Proxima Centauri Planets in High-Cadence TESS Data

Proxima Centauri is our nearest stellar neighbor and one of the most well-studied stars in the sky. In 2016, a planetary companion was detected through radial velocity measurements. Proxima Centauri b has a minimum mass of 1.3 Earth masses and orbits with a period of 11.2 days at 0.05 AU from its st...

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Autores principales:	Emily A. Gilbert, Thomas Barclay, Ethan Kruse, Elisa V. Quintana, Lucianne M. Walkowicz
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	stellar activity algorithms exoplanet detection methods stellar flares M dwarf stars Astronomy QB1-991 Geophysics. Cosmic physics QC801-809
Acceso en línea:	https://doaj.org/article/181df42b610a4cb68b5ce8fe2161ce73
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id	oai:doaj.org-article:181df42b610a4cb68b5ce8fe2161ce73
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spelling	oai:doaj.org-article:181df42b610a4cb68b5ce8fe2161ce732021-11-19T07:33:13ZNo Transits of Proxima Centauri Planets in High-Cadence TESS Data2296-987X10.3389/fspas.2021.769371https://doaj.org/article/181df42b610a4cb68b5ce8fe2161ce732021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fspas.2021.769371/fullhttps://doaj.org/toc/2296-987XProxima Centauri is our nearest stellar neighbor and one of the most well-studied stars in the sky. In 2016, a planetary companion was detected through radial velocity measurements. Proxima Centauri b has a minimum mass of 1.3 Earth masses and orbits with a period of 11.2 days at 0.05 AU from its stellar host, and resides within the star’s Habitable Zone. While recent work has shown that Proxima Centauri b likely does not transit, given the value of potential atmospheric observations via transmission spectroscopy of the closest possible Habitable Zone planet, we reevaluate the possibility that Proxima Centauri b is a transiting exoplanet using data from the Transiting Exoplanet Survey Satellite (TESS). We use three sectors (Sectors 11, 12, and 38 at 2-min cadence) of observations from TESS to search for planets. Proxima Centauri is an extremely active M5.5 star, emitting frequent white-light flares; we employ a novel method that includes modeling the stellar activity in our planet search algorithm. We do not detect any planet signals. We injected synthetic transiting planets into the TESS and use this analysis to show that Proxima Centauri b cannot be a transiting exoplanet with a radius larger than 0.4 R⊕. Moreover, we show that it is unlikely that any Habitable Zone planets larger than Mars transit Proxima Centauri.Emily A. GilbertEmily A. GilbertEmily A. GilbertEmily A. GilbertEmily A. GilbertThomas BarclayThomas BarclayEthan KruseElisa V. QuintanaLucianne M. WalkowiczFrontiers Media S.A.articlestellar activityalgorithmsexoplanet detection methodsstellar flaresM dwarf starsAstronomyQB1-991Geophysics. Cosmic physicsQC801-809ENFrontiers in Astronomy and Space Sciences, Vol 8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	stellar activity algorithms exoplanet detection methods stellar flares M dwarf stars Astronomy QB1-991 Geophysics. Cosmic physics QC801-809
spellingShingle	stellar activity algorithms exoplanet detection methods stellar flares M dwarf stars Astronomy QB1-991 Geophysics. Cosmic physics QC801-809 Emily A. Gilbert Emily A. Gilbert Emily A. Gilbert Emily A. Gilbert Emily A. Gilbert Thomas Barclay Thomas Barclay Ethan Kruse Elisa V. Quintana Lucianne M. Walkowicz No Transits of Proxima Centauri Planets in High-Cadence TESS Data
description	Proxima Centauri is our nearest stellar neighbor and one of the most well-studied stars in the sky. In 2016, a planetary companion was detected through radial velocity measurements. Proxima Centauri b has a minimum mass of 1.3 Earth masses and orbits with a period of 11.2 days at 0.05 AU from its stellar host, and resides within the star’s Habitable Zone. While recent work has shown that Proxima Centauri b likely does not transit, given the value of potential atmospheric observations via transmission spectroscopy of the closest possible Habitable Zone planet, we reevaluate the possibility that Proxima Centauri b is a transiting exoplanet using data from the Transiting Exoplanet Survey Satellite (TESS). We use three sectors (Sectors 11, 12, and 38 at 2-min cadence) of observations from TESS to search for planets. Proxima Centauri is an extremely active M5.5 star, emitting frequent white-light flares; we employ a novel method that includes modeling the stellar activity in our planet search algorithm. We do not detect any planet signals. We injected synthetic transiting planets into the TESS and use this analysis to show that Proxima Centauri b cannot be a transiting exoplanet with a radius larger than 0.4 R⊕. Moreover, we show that it is unlikely that any Habitable Zone planets larger than Mars transit Proxima Centauri.
format	article
author	Emily A. Gilbert Emily A. Gilbert Emily A. Gilbert Emily A. Gilbert Emily A. Gilbert Thomas Barclay Thomas Barclay Ethan Kruse Elisa V. Quintana Lucianne M. Walkowicz
author_facet	Emily A. Gilbert Emily A. Gilbert Emily A. Gilbert Emily A. Gilbert Emily A. Gilbert Thomas Barclay Thomas Barclay Ethan Kruse Elisa V. Quintana Lucianne M. Walkowicz
author_sort	Emily A. Gilbert
title	No Transits of Proxima Centauri Planets in High-Cadence TESS Data
title_short	No Transits of Proxima Centauri Planets in High-Cadence TESS Data
title_full	No Transits of Proxima Centauri Planets in High-Cadence TESS Data
title_fullStr	No Transits of Proxima Centauri Planets in High-Cadence TESS Data
title_full_unstemmed	No Transits of Proxima Centauri Planets in High-Cadence TESS Data
title_sort	no transits of proxima centauri planets in high-cadence tess data
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/181df42b610a4cb68b5ce8fe2161ce73
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No Transits of Proxima Centauri Planets in High-Cadence TESS Data

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