SIMBAD references

2011ApJ...736L...4S - Astrophys. J., 736, L4 (2011/July-3)

Asymmetric transit curves as indication of orbital obliquity: clues from the late-type dwarf companion in KOI-13.

SZABO G.M., SZABO R., BENKO J.M., LEHMANN H., MEZO G., SIMON A.E., KOVARI Z., HODOSAN G., REGALY Z. and KISS L.L.

Abstract (from CDS):

KOI-13.01, a planet-sized companion in an optical double star, was announced as one of the 1235 Kepler planet candidates in 2011 February. The transit curves show significant distortion that was stable over the ∼130 days time span of the data. Here we investigate the phenomenon via detailed analyses of the two components of the double star and a re-reduction of the Kepler data with pixel-level photometry. Our results indicate that KOI-13 is a common proper motion binary, with two rapidly rotating components (vsin i ~ 65-70 km/s). We identify the host star of KOI-13.01 and conclude that the transit curve asymmetry is consistent with a companion orbiting a rapidly rotating, possibly elongated star on an oblique orbit. The radius of the transiter is 2.2 RJ, implying an irradiated late-type dwarf, probably a hot brown dwarf rather than a planet. KOI-13 is the first example for detecting orbital obliquity for a substellar companion without measuring the Rossiter-McLaughlin effect with spectroscopy.

Abstract Copyright:

Journal keyword(s): binaries: visual - brown dwarfs - stars: individual (CCDM J19079+4652AB, KOI-13)

CDS comments: OGLE-2 is not identified.

Simbad objects: 9

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2011ApJ...736L...4S and select 'bookmark this link' or equivalent in the popup menu


2021.01.21-03:59:34

© Université de Strasbourg/CNRS

    • Contact