2016ApJ...830L...7K

Query : 2016ApJ...830L...7K

2016ApJ...830L...7K - Astrophys. J., 830, L7-L7 (2016/October-2)

Chromosomes emission of planet candidate host stars: a way to identify false positives.

KAROFF C., ALBRECHT S., BONANNO A. and KNUDSEN M.F.

Abstract (from CDS):

It has been hypothesized that the presence of closely orbiting giant planets is associated with enhanced chromospheric emission of their host stars. The main cause for such a relation would likely be enhanced dynamo action induced by the planet. We present measurements of chromospheric emission in 234 planet candidate systems from the Kepler mission. This ensemble includes 37 systems with giant-planet candidates, which show a clear emission enhancement. The enhancement, however, disappears when systems that are also identified as eclipsing binary candidates are removed from the ensemble. This suggests that a large fraction of the giant-planet candidate systems with chromospheric emission stronger than the Sun are not giant-planet systems, but false positives. Such false-positive systems could be tidally interacting binaries with strong chromospheric emission. This hypothesis is supported by an analysis of 188 eclipsing binary candidates that show increasing chromospheric emission as function of decreasing orbital period.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): binaries: eclipsing - planet-star interactions - stars: activity - stars: chromospheres - stars: solar-type - stars: solar-type

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 * 51 Peg b Pl 22 57 27.9804852576 +20 46 07.797040104           ~ 744 1

Query : 2016ApJ...830L...7K

Basic data :
* 51 Peg b -- Extra-solar Planet
Other object types: otypes_help 		Pl? (), * (*,HD), Pl (1995Natur)
ICRS coord. (ep=J2000) : 		22 57 27.9804852576 +20 46 07.797040104 (Optical) [ 0.0535 0.0543 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		22 55 00.3824419857 +20 30 01.119685421 [ 0.0535 0.0543 90 ]
Gal coord. (ep=J2000) : 		090.0626441289023 -34.7272597942784 [ 0.0535 0.0543 90 ]
Proper motions mas/yr : 		207.328 61.164 [0.088 0.075 90] A 2020yCat.1350....0G
Parallaxes (mas): 		64.4048 [0.0771] A 2020yCat.1350....0G
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* 51 Peg b HD 217014b NAME Dimidium

References (744 between 1850 and 2026) (Total 744)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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