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A transiting M-dwarf showing beaming effect in the field of Ruprecht 147

Eigmüller, Philipp and Csizmadia, S and Endl, Michael and Gandolfi, D. and Cochran, W.D. and Yong, D. and Smith, A. M. S. and Cabrera, J and Deeg, H. J. and Johnson, Marshall C. and Korth, J. and Nespral, D. and Prieto-Arranz, J. and Hatzes, A. (2018) A transiting M-dwarf showing beaming effect in the field of Ruprecht 147. Monthly Notices of the Royal Astronomical Society, 480, pp. 3864-3870. Oxford University Press. DOI: 10.1093/mnras/sty2155 ISBN 0035-8711 ISSN 0035-8711

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Official URL: http://cdsads.u-strasbg.fr/abs/2018MNRAS.480.3864E

Abstract

We report the discovery and characterization of an eclipsing M5Vdwarf star, orbiting a slightly evolved F7V main sequence star. In contrast to previous claims in the literature, we confirm that the system does not belong to the galactic open cluster Ruprecht 147. We determine its fundamental parameters combining K2 time-series data with spectroscopic observations from the McDonald Observatory, FIES@NOT, and HIRES@KECK. The very precise photometric data from the K2 mission allows us to measure variations caused by the beaming effect (relativistic doppler boosting), ellipsoidal variation, reflection, and the secondary eclipse. We determined the radial velocity using spectroscopic observations and compare it to the radial velocity determined from the beaming effect observed in the photometric data. The M5V star has a radius of 0.200 ^{+0.007 }_{ -0.008} R&sun; and a mass of 0.187 ^{+0.012 }_{ -0.013} M&sun;. The primary star has a radius of 1.518 ^{+0.038 }_{ -0.049} R&sun; and a mass of 1.008 ^{+0.081 }_{ -0.097} M&sun;. The orbital period is 5.441995 ± 0.000007 d. The system is one of the few eclipsing systems with observed beaming effect and spectroscopic radial velocity measurements and it can be used as a test case for the modelling of the beaming effect. Current and forthcoming space missions such as TESS and PLATO might benefit from the analysis of the beaming effect to estimate the mass of transiting companions without the need for radial velocity follow up observations, provided that the systematic sources of noise affecting this method are well understood.

Item URL in elib:https://elib.dlr.de/126760/
Document Type:Article
Title:A transiting M-dwarf showing beaming effect in the field of Ruprecht 147
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Eigmüller, PhilippPhilipp.Eigmueller (at) dlr.dehttps://orcid.org/0000-0003-4096-0594
Csizmadia, Sszilard.csizmadia (at) dlr.deUNSPECIFIED
Endl, MichaelUNSPECIFIEDUNSPECIFIED
Gandolfi, D.Dipartimento di Fisica, Universitadi Torino, via P. Giuria 1, I-10125 Torino, ItalyUNSPECIFIED
Cochran, W.D.Univ. of Texas, Astronomy Dept., Austin, TX, USAUNSPECIFIED
Yong, D.Aust. Nat. UniversityUNSPECIFIED
Smith, A. M. S.alexis.smith (at) dlr.deUNSPECIFIED
Cabrera, Jjuan.cabrera (at) dlr.deUNSPECIFIED
Deeg, H. J.Instituto de Astrofísica de Andalucía, Granada, SpainUNSPECIFIED
Johnson, Marshall C.Department of Astronomy, The Ohio State University, 140 West 18th Ave., Columbus, OH 43210, USAUNSPECIFIED
Korth, J.Rheinisches Institut fuer Umweltforschung an der Universitaet zu Koeln, Aachener Strasse 209, 50931 Koeln, GermanyUNSPECIFIED
Nespral, D.Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain | Departamento de Astrofisica, Universidad de La Laguna, 38206 La Laguna, SpainUNSPECIFIED
Prieto-Arranz, J.Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain | Departamento de Astrofisica, Universidad de La Laguna, 38206 La Laguna, SpainUNSPECIFIED
Hatzes, A.Thüringer Landessternwarte TautenburgUNSPECIFIED
Date:2018
Journal or Publication Title:Monthly Notices of the Royal Astronomical Society
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:480
DOI :10.1093/mnras/sty2155
Page Range:pp. 3864-3870
Publisher:Oxford University Press
ISSN:0035-8711
ISBN:0035-8711
Status:Published
Keywords:binaries: eclipsing, stars: fundamental parameters, stars: low-mass
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt COROT Beteiligung
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Deposited By: Cabrera Perez, Juan
Deposited On:07 Mar 2019 14:56
Last Modified:06 Sep 2019 15:17

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