Universität zu Köln

Eigmueller, Philipp, Csizmadia, Szilard, Endl, Michael, Gandolfi, Davide, Cochran, William D., Yong, David, Smith, Alexis M. S., Cabrera, Juan ORCID: 0000-0001-6653-5487, Deeg, Hans J., Johnson, Marshall C., Korth, Judith ORCID: 0000-0002-0076-6239, Nespral, David, Prieto-Arranz, Jorge and Hatzes, Artie P. (2018). A transiting M-dwarf showing beaming effect in the field of Ruprecht 147. Mon. Not. Roy. Astron. Soc., 480 (3). S. 3864 - 3871. OXFORD: OXFORD UNIV PRESS. ISSN 1365-2966

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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(-0.008)(+0.007) R-circle dot and a mass of 0.187(-0.013)(+0.012) M-circle dot. The primary star has a radius of 1.518(-0.049)(+0.038) R-circle dot and a mass of 1.008(-0.097)(+0.081) M-circle dot. 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 Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Eigmueller, Philipp UNSPECIFIED UNSPECIFIED UNSPECIFIED Csizmadia, Szilard UNSPECIFIED UNSPECIFIED UNSPECIFIED Endl, Michael UNSPECIFIED UNSPECIFIED UNSPECIFIED Gandolfi, Davide UNSPECIFIED UNSPECIFIED UNSPECIFIED Cochran, William D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Yong, David UNSPECIFIED UNSPECIFIED UNSPECIFIED Smith, Alexis M. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cabrera, Juan UNSPECIFIED orcid.org/0000-0001-6653-5487 UNSPECIFIED Deeg, Hans J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Johnson, Marshall C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Korth, Judith UNSPECIFIED orcid.org/0000-0002-0076-6239 UNSPECIFIED Nespral, David UNSPECIFIED UNSPECIFIED UNSPECIFIED Prieto-Arranz, Jorge UNSPECIFIED UNSPECIFIED UNSPECIFIED Hatzes, Artie P. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-167956
DOI:	10.1093/mnras/sty2155
Journal or Publication Title:	Mon. Not. Roy. Astron. Soc.
Volume:	480
Number:	3
Page Range:	S. 3864 - 3871
Date:	2018
Publisher:	OXFORD UNIV PRESS
Place of Publication:	OXFORD
ISSN:	1365-2966
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Externe Einrichtungen > An-Institute > Associated Institutes of the Faculty of Mathematics and Natural Sciences > Rhenish Institute for Environmental Research - RIU
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language OPEN CLUSTERS; BINARY STARS; LIGHT CURVES; K2 MISSION; KEPLER; TELESCOPE; COMPANION; JUPITER; CATALOG; PLANET Multiple languages Astronomy & Astrophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/16795