J/A+A/566/A67 Velocity curves of βCnc, µLeo and βUMi (Lee+, 2014)
Planetary companions in K giants beta Cancri, mu Leonis, and beta Ursae Minoris.
Lee B.-C., Han I., Park M.-G., Mkrtichian D.E., Hatzes A.P., Kim K.-M.
<Astron. Astrophys. 566, A67 (2014)>
=2014A&A...566A..67L 2014A&A...566A..67L
ADC_Keywords: Stars, double and multiple ; Stars, giant ; Planets ;
Radial velocities
Keywords: instrumentation: spectrographs - technique: radial velocity -
stars: planetary systems
Abstract:
To investigate the low-amplitude and long-period variations in evolved
stars with a precise radial velocity (RV) survey.
The high-resolution, the fiber-fed Bohyunsan Observatory Echelle
Spectrograph (BOES) was used from 2003 to 2013 for an RV 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 beta Cnc, mu Leo, and beta UMi. The planetary nature of the
RV variations is supported by analyses of ancillary data. The
HIPPARCOS photometry shows no variations with periods close to those
in RV variations and there is no strong correlation between the
bisector velocity span (BVS) and the RVs for each star. Furthermore,
the stars show weak or no core reversal in Ca II H lines indicating
that they are inactive stars. The companion to beta Cnc has a minimum
mass of 7.8MJup in a 605-day orbit with an eccentricity of 0.08.
mu Leo is orbited by a companion of minimum mass of 2.4MJup having a
period of 357-days, and an eccentricity of 0.09. beta UMi is a known
barium star and is suspected of harbouring 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.
Description:
The RV measurements for beta Cnc, mu Leo, and beta UMi from December
2003 to May 2013 are listed in Tables 4, 5, and 6, respectively.
Objects:
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RA (2000) DE Designation(s) (Per) (files)
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08 16 30.92 +09 11 08.0 beta Cnc = HR 3249 (605) (table4.dat)
09 52 45.82 +26 00 25.0 mu Leo = HR 3905 (357) (table5.dat)
14 50 42.33 +74 09 19.8 beta UMi = HR 5563 (522) (table6.dat)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 26 85 Radial velocity of β Cnc
table5.dat 26 103 Radial velocity of µ Leo
table6.dat 26 78 Radial velocity of β UMi
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See also:
J/A+A/529/A134 : Velocity curve of α Arietis (Lee+, 2011)
J/A+A/546/A5 : eps CrB radial velocity curve (Lee+, 2012)
Byte-by-byte Description of file: table4.dat table5.dat table6.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 --- HJD Heliocentric Julian date of the observation
16- 21 F6.1 m/s RV Radial velocity
23- 26 F4.1 m/s e_RV Standard error of RV
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Acknowledgements:
Byeng-Cheol Lee, bclee(at)kasi.re.kr
(End) Byeong-Cheol Lee [KASI, Korea], Patricia Vannier [CDS] 26-May-2014