Orbital Period Refinement of CoRoT Planets with TESS Observations

CoRoT was the first space mission dedicated to exoplanet detection. Operational between 2007 and 2012, this mission discovered 37 transiting planets, including CoRoT-7b, the first terrestrial exoplanet with a measured size. The precision of the published transit ephemeris of most of these planets ha...

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Autores principales:	Peter Klagyivik , Hans J. Deeg , Szilárd Csizmadia , Juan Cabrera , Grzegorz Nowak
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	exoplanet CoRoT TESS photometry orbital period transit timing variation Astronomy QB1-991 Geophysics. Cosmic physics QC801-809
Acceso en línea:	https://doaj.org/article/5bafbf2e34de452fb6ddb71916f9cfe1
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id	oai:doaj.org-article:5bafbf2e34de452fb6ddb71916f9cfe1
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spelling	oai:doaj.org-article:5bafbf2e34de452fb6ddb71916f9cfe12021-12-03T16:05:14ZOrbital Period Refinement of CoRoT Planets with TESS Observations2296-987X10.3389/fspas.2021.792823https://doaj.org/article/5bafbf2e34de452fb6ddb71916f9cfe12021-12-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fspas.2021.792823/fullhttps://doaj.org/toc/2296-987XCoRoT was the first space mission dedicated to exoplanet detection. Operational between 2007 and 2012, this mission discovered 37 transiting planets, including CoRoT-7b, the first terrestrial exoplanet with a measured size. The precision of the published transit ephemeris of most of these planets has been limited by the relative short durations of the CoRoT pointings, which implied a danger that the transits will become unobservable within a few years due to the uncertainty of their future transit epochs. Ground-based follow-up observations of the majority of the CoRoT planets have been published in recent years. Between Dec. 2018 and Jan. 2021, the TESS mission in its sectors 6 and 33 re-observed those CoRoT fields that pointed towards the Galactic anti-center. These data permitted the identification of transits from nine of the CoRoT planets, and the derivation of precise new transit epochs. The main motivation of this study has been to derive precise new ephemerides of the CoRoT planets, in order to keep these planets’ transits observable for future generations of telescopes. The TESS data were analyzed for the presence of transits and the epochs of these re-observed transits were measured. The original CoRoT epochs, epochs from ground-based follow-up observations and those from TESS were collected. From these data, updated ephemerides are presented for nine transiting planets discovered by the CoRoT mission in its fields pointing towards the Galactic anti-center. In three cases (CoRoT-4b, 19b and 20b), transits that would have been lost for ground observations, due to the large uncertainty in the previous ephemeris, have been recovered. The updated ephemerides permit transit predictions with uncertainties of less than 30 min for observations at least until the year 2030. No significant transit timing variations were found in these systems.Peter Klagyivik Peter Klagyivik Peter Klagyivik Hans J. Deeg Hans J. Deeg Szilárd Csizmadia Juan Cabrera Grzegorz Nowak Grzegorz Nowak Frontiers Media S.A.articleexoplanetCoRoTTESSphotometryorbital periodtransit timing variationAstronomyQB1-991Geophysics. Cosmic physicsQC801-809ENFrontiers in Astronomy and Space Sciences, Vol 8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	exoplanet CoRoT TESS photometry orbital period transit timing variation Astronomy QB1-991 Geophysics. Cosmic physics QC801-809
spellingShingle	exoplanet CoRoT TESS photometry orbital period transit timing variation Astronomy QB1-991 Geophysics. Cosmic physics QC801-809 Peter Klagyivik Peter Klagyivik Peter Klagyivik Hans J. Deeg Hans J. Deeg Szilárd Csizmadia Juan Cabrera Grzegorz Nowak Grzegorz Nowak Orbital Period Refinement of CoRoT Planets with TESS Observations
description	CoRoT was the first space mission dedicated to exoplanet detection. Operational between 2007 and 2012, this mission discovered 37 transiting planets, including CoRoT-7b, the first terrestrial exoplanet with a measured size. The precision of the published transit ephemeris of most of these planets has been limited by the relative short durations of the CoRoT pointings, which implied a danger that the transits will become unobservable within a few years due to the uncertainty of their future transit epochs. Ground-based follow-up observations of the majority of the CoRoT planets have been published in recent years. Between Dec. 2018 and Jan. 2021, the TESS mission in its sectors 6 and 33 re-observed those CoRoT fields that pointed towards the Galactic anti-center. These data permitted the identification of transits from nine of the CoRoT planets, and the derivation of precise new transit epochs. The main motivation of this study has been to derive precise new ephemerides of the CoRoT planets, in order to keep these planets’ transits observable for future generations of telescopes. The TESS data were analyzed for the presence of transits and the epochs of these re-observed transits were measured. The original CoRoT epochs, epochs from ground-based follow-up observations and those from TESS were collected. From these data, updated ephemerides are presented for nine transiting planets discovered by the CoRoT mission in its fields pointing towards the Galactic anti-center. In three cases (CoRoT-4b, 19b and 20b), transits that would have been lost for ground observations, due to the large uncertainty in the previous ephemeris, have been recovered. The updated ephemerides permit transit predictions with uncertainties of less than 30 min for observations at least until the year 2030. No significant transit timing variations were found in these systems.
format	article
author	Peter Klagyivik Peter Klagyivik Peter Klagyivik Hans J. Deeg Hans J. Deeg Szilárd Csizmadia Juan Cabrera Grzegorz Nowak Grzegorz Nowak
author_facet	Peter Klagyivik Peter Klagyivik Peter Klagyivik Hans J. Deeg Hans J. Deeg Szilárd Csizmadia Juan Cabrera Grzegorz Nowak Grzegorz Nowak
author_sort	Peter Klagyivik
title	Orbital Period Refinement of CoRoT Planets with TESS Observations
title_short	Orbital Period Refinement of CoRoT Planets with TESS Observations
title_full	Orbital Period Refinement of CoRoT Planets with TESS Observations
title_fullStr	Orbital Period Refinement of CoRoT Planets with TESS Observations
title_full_unstemmed	Orbital Period Refinement of CoRoT Planets with TESS Observations
title_sort	orbital period refinement of corot planets with tess observations
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/5bafbf2e34de452fb6ddb71916f9cfe1
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Orbital Period Refinement of CoRoT Planets with TESS Observations

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