Radial Velocity Follow-up of Planetary Transit Candidate MACHO.120.22303.5389

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dc.creatorWeldrake, David T. F
dc.creatorSetiawan, Johny
dc.creatorWeise, Patrick
dc.creatorHenning, Thomas
dc.date2006-12-08
dc.date.accessioned2026-07-07T07:31:07Z
dc.date.available2026-07-07T07:31:07Z
dc.descriptionWe present preliminary results on the radial velocity follow-up of a planetary transit candidate (P=2.43d, V=15.4) detected during the MACHO project. The photometry is consistent with a grazing transit of an object with radius >=1.8RJ orbiting a K dwarf star, and is the brightest best candidate detected from MACHO. Results from the 2.2m MPG/ESO telescope and FEROS (R=48,000) in May 2006 display an apparent radial velocity variation with amplitude ~650m/s with the same period as the transit, and a solar-type primary. This is consistent with an orbiting companion of mass ~4MJ. However, further observations display an additional secondary long-period variation with amplitude of several km/s, indicating the presence of a third body. The system is likely a low mass eclipsing binary orbiting the solar-type primary. Further observations are planned to fully characterize the system.
dc.description3 pages, 2 figures. To appear in the PASP proceedings of "Transiting Extrasolar Planets Workshop" MPIA Heidelberg Germany, 25th-28th September 2006. Eds: Cristina Afonso, David Weldrake & Thomas Henning
dc.identifierhttps://arxiv.org/abs/astro-ph/0612214
dc.identifierhttp://arxiv.org/abs/astro-ph/0612214
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/118636
dc.subjectAstrophysics
dc.titleRadial Velocity Follow-up of Planetary Transit Candidate MACHO.120.22303.5389
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