Tal-Or, L., Santerne, A., Mazeh, T., Bouchy, F., Moutou, C., Alonso, R., Gandolfi, D., Aigrain, S., Auvergne, M., Barge, P., Bonomo, A. S., Borde, P., Deeg, H., Ferraz-Mello, S., Deleuil, M., Dvorak, R., Erikson, A., Fridlund, M., Gillon, M., Guenther, E. W., Guillot, T., Hatzes, A., Jorda, L., Lammer, H., Leger, A., Llebaria, A., Ollivier, M., Paetzold, M., Queloz, D., Rauer, H., Rouan, D., Tsodikovich, Y. and Wuchterl, G. (2011). CoRoT LRa02_E2_0121: Neptune-size planet candidate turns into a hierarchical triple system with a giant primary. Astron. Astrophys., 534. LES ULIS CEDEX A: EDP SCIENCES S A. ISSN 0004-6361

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Abstract

This paper presents the case of CoRoT LRa02_E2_0121, which was initially classified as a Neptune-size transiting-planet candidate on a relatively wide orbit of 36.3 days. Follow-up observations were performed with UVES, Sandiford, SOPHIE, and HARPS. These observations revealed a faint companion in the spectra. To find the true nature of the system we derived the radial velocities of the faint companion using TODMOR - a two-dimensional correlation technique, applied to the SOPHIE spectra. Modeling the lightcurve with EBAS we discovered a secondary eclipse with a depth of similar to 0.07%, indicating a diluted eclipsing binary. Combined MCMC modeling of the lightcurve and the radial velocities suggested that CoRoT LRa02_E2_0121 is a hierarchical triple system with an evolved G-type primary and an A-type: F-type grazing eclipsing binary. Such triple systems are difficult to discover.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Tal-Or, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Santerne, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mazeh, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bouchy, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Moutou, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Alonso, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gandolfi, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Aigrain, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Auvergne, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Barge, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bonomo, A. S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Borde, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Deeg, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ferraz-Mello, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Deleuil, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dvorak, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Erikson, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fridlund, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gillon, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Guenther, E. W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Guillot, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hatzes, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jorda, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lammer, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Leger, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Llebaria, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ollivier, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Paetzold, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Queloz, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rauer, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rouan, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tsodikovich, Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wuchterl, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-488268
DOI: 10.1051/0004-6361/201117374
Journal or Publication Title: Astron. Astrophys.
Volume: 534
Date: 2011
Publisher: EDP SCIENCES S A
Place of Publication: LES ULIS CEDEX A
ISSN: 0004-6361
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
CORALIE ECHELLE SPECTROGRAPH; EXTRA-SOLAR PLANETS; BINARY LIGHT CURVES; MULTI-ORDER TODCOR; SPECTROSCOPIC BINARIES; TRANSITING EXOPLANETS; ECLIPSING BINARIES; AUTOMATED-ANALYSIS; STARS; MULTIPLICITYMultiple languages
Astronomy & AstrophysicsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/48826

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