2016ApJ...822L...3J


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.16CEST10:26:46

2016ApJ...822L...3J - Astrophys. J., 822, L3-L3 (2016/May-1)

The age of the directly imaged planet host star κ Andromedae determined from interferometric observations.

JONES J., WHITE R.J., QUINN S., IRELAND M., BOYAJIAN T., SCHAEFER G. and BAINES E.K.

Abstract (from CDS):

κ Andromedae, an early-type star that hosts a directly imaged low-mass companion, is expected to be oblate due to its rapid rotational velocity (v sin i = ∼162 km s-1). We observed the star with the CHARA Array's optical beam combiner, PAVO, measuring its size at multiple orientations and determining its oblateness. The interferometric measurements, combined with photometry and this v sin i value are used to constrain an oblate star model that yields the fundamental properties of the star and finds a rotation speed that is ∼85% of the critical rate and a low inclination of ∼30°. Three modeled properties (the average radius, bolometric luminosity, and equatorial velocity) are compared to MESA evolution models to determine an age and mass for the star. In doing so, we determine an age for the system of {47}_{-40}^{+27} Myr. Based on this age and previous measurements of the companion's temperature, the BHAC15 evolution models imply a mass for the companion of {22}_{-9}^{+8} M J.

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

Journal keyword(s): planetary systems - stars: early-type - stars: evolution - stars: individual: κ Andromedae - stars: rotation - techniques: interferometric

Simbad objects: 6

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Number of rows : 6

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 NAME Columba Association As* 06 14.0 -40 03           ~ 184 0
2 NAME Ursa Major Moving Group MGr 12 32 +57.0           ~ 371 2
3 * 13 And a2* 23 27 07.4001735971 +42 54 43.235898084   5.726 5.736     B9III 51 0
4 * 18 And * 23 39 08.3319478648 +50 28 18.232835105   5.24 5.35     B9Ve 50 0
5 * kap And b Pl 23 40 24.5064536189 +44 20 02.175809921           ~ 48 1
6 * kap And PM* 23 40 24.5076320 +44 20 02.156595 3.80 4.06 4.14 4.15 4.22 A0V 172 1

    Equat.    Gal    SGal    Ecl

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2019.10.16-10:26:46

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