2014A&A...566A..67L


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.03CEST23:03:21

2014A&A...566A..67L - Astronomy and Astrophysics, volume 566A, 67-67 (2014/6-1)

Planetary companions in K giants β Cancri, µ Leonis, and β Ursae Minoris.

LEE B.-C., HAN I., PARK M.-G., MKRTICHIAN D.E., HATZES A.P. and KIM K.-M.

Abstract (from CDS):

The aim of our paper is to investigate the low-amplitude and long-period variations in evolved stars with a precise radial velocity survey. The high-resolution, the fiber-fed Bohyunsan Observatory Echelle Spectrograph (BOES) was used from 2003 to 2013 for a radial velocity survey of giant stars as part of the exoplanet search program at Bohyunsan Optical Astronomy Observatory (BOAO). We report the detection of three new planetary companions orbiting the K giants β Cnc, µ Leo, and β UMi. The planetary nature of the radial velocity variations is supported by analyzes of ancillary data. The Hipparcos photometry shows no variations with periods close to those in radial velocity variations and there is no strong correlation between the bisector velocity span (BVS) and the radial velocities for each star. Furthermore, the stars show weak or no core reversal in CaII H lines indicating that they are inactive stars. The companion to β Cnc has a minimum mass of 7.8MJup in a 605-day orbit with an eccentricity of 0.08. The giant µLeo is orbited by a companion of minimum mass of 2.4MJup having a period of 357-days and an eccentricity of 0.09. The giant β UMi is a known barium star and is suspected of harboring a white dwarf or substellar mass companion. Its companion has a minimum mass of 6.1MJup, a period of 522-days, and an eccentricity e=0.19.

Abstract Copyright:

Journal keyword(s): instrumentation: spectrographs - techniques: radial velocities - planetary systems

VizieR on-line data: <Available at CDS (J/A+A/566/A67): table4.dat table5.dat table6.dat>

Simbad objects: 13

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Number of rows : 13

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * tau Cet PM* 01 44 04.0834226 -15 56 14.926552 4.43 4.22 3.50 2.88 2.41 G8V 1091 1
2 * alf Tau LP? 04 35 55.23907 +16 30 33.4885 4.32 2.40 0.86 -0.37 -1.31 K5+III 1178 1
3 * sig Gem RS* 07 43 18.7269793 +28 53 00.642191 6.38 5.41 4.29 3.37 2.79 K1IIIe 444 0
4 * bet Cnc PM* 08 16 30.9210081 +09 11 07.957924 6.750 5.000 3.520 2.42 1.62 K4IIIBa0.5: 341 0
5 * bet Cnc b Pl 08 16 30.9210081 +09 11 07.957924           ~ 1 0
6 * lam Vel LP* 09 07 59.75787 -43 25 57.3273 5.67 3.86 2.21 0.97 0.03 K4Ib 202 0
7 * mu. Leo b Pl 09 52 45.8165435 +26 00 25.031882           ~ 1 0
8 * mu. Leo PM* 09 52 45.8165435 +26 00 25.031882 6.50 5.10 3.88 2.97 2.39 K2IIIbCN1Ca1 401 0
9 V* DK Dra RS* 12 15 41.4913707788 +72 33 04.305716292   7.43 6.30     K0+IIICH-1 162 0
10 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2131 0
11 * bet UMi V* 14 50 42.32580 +74 09 19.8142 5.32 3.55 2.08 0.97 0.21 K4-III 301 0
12 * bet UMi b Pl 14 50 42.32580 +74 09 19.8142           ~ 1 0
13 HD 166435 PM* 18 09 21.3817906855 +29 57 06.165674208   7.457 6.829     G1IV 169 0

    Equat.    Gal    SGal    Ecl

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2020.07.03-23:03:21

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