J/ApJ/654/625 Radial velocities of 9 long-period objects (Wittenmyer+, 2007)
Long-period objects in the extrasolar planetary systems 47 Ursae Majoris
and 14 Herculis.
Wittenmyer R.A., Endl M., Cochran W.D.
<Astrophys. J., 654, 625-632 (2007)>
=2007ApJ...654..625W 2007ApJ...654..625W
ADC_Keywords: Stars, double and multiple ; Planets ; Radial velocities
Keywords: planetary systems - stars: individual: 47 Ursae Majoris, 14 Herculis -
techniques: radial velocities
Abstract:
The possible existence of additional long-period planetary-mass
objects in the extrasolar planetary systems 47 UMa and 14 Her is
investigated. We combine all available radial velocity data on these
stars, spanning up to 18yr. For the 47 UMa system, we show that while
a second planet improves the fit to all available data, there is still
substantial ambiguity as to the orbital parameters of the proposed
planetary companion 47 UMa c. We also present new observations that
clearly support a long-period companion in the 14 Her system. With a
period of 6906±70 days, 14 Her c may be in a 4:1 resonance with the
inner planet. We also present revised orbital solutions for seven
previously known planets, incorporating recent additional data
obtained with the 2.7m Harlan J. Smith Telescope at McDonald
Observatory.
Description:
Data obtained from the McDonald Observatory planet search program are
discussed fully in Wittenmyer et al. (2006AJ....132..177W 2006AJ....132..177W). Available
published data were combined with the McDonald data to fit Keplerian
orbits using GaussFit (Jefferys et al. 1987, Celest. Mech., 41, 39).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 50 9 Stellar parameters
table2.dat 104 14 Planet parameters
veloc.dat 39 450 Radial Velocities (tables 5 to 14 of paper)
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [HD]
4- 9 I6 --- HD HD number of star
11- 16 A6 --- --- Sp MK spectral type
20- 23 F4.2 solMass Mass Stellar mass
26- 29 F4.2 [Sun] [Fe/H] metallicity
31- 34 F4.2 [Sun] e_[Fe/H] Mean error on [Fe/H]
36- 40 I5 K Teff Effective temperature of star
42- 43 I2 K e_Teff Mean error on Teff
46- 50 F5.2 --- logR'HK Activity index (ratio of Ca H+K bands
relative to the total stellar flux)
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [HD]
4- 9 I6 --- HD HD number of parent star
11 A1 --- m_HD [bcd] Planet designation
13- 22 F10.5 d P Oribtal period
24- 32 F9.5 d e_P Mean error on P
34- 41 F8.2 d T0-2400000 Periastron epoch (JD-2400000)
43- 48 F6.2 d e_T0-2400000 Mean error on T0-2400000
50- 54 F5.3 --- e Eccentricity of orbit (1)
56- 60 F5.3 --- e_e ? Mean error on e (1)
62- 66 F5.1 deg omega Periastron angle (1)
68- 71 F4.1 deg e_omega ? Mean error on omega (1)
73- 77 F5.1 m/s K Velocity semi-amplitude
79- 81 F3.1 m/s e_K Mean error on K
83- 87 F5.2 jovMass Msini Projected mass, in units of Jupiter mass
89- 92 F4.2 jovMass e_Msini Mean error on Msini
94- 98 F5.3 AU a Semi-major axis of orbit
100-104 F5.3 AU e_a Mean error on a
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Note (1): value of parameter is fixed when the error is blank.
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Byte-by-byte Description of file: veloc.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [HD]
4- 9 I6 --- HD HD number
11- 13 A3 --- Tel Telescope
15- 27 F13.5 --- JD Julian Date of observation
29- 34 F6.1 m/s RV Radial velocity
36- 39 F4.1 m/s e_RV Uncertainty in RV
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 15-Nov-2008