J/ApJ/634/625 Radial velocities and photometry of GJ 876 (Rivera+, 2005)
A ∼7.5 M(Earth) planet orbiting the nearby star, GJ 876.
Rivera E.J., Lissauer J.J., Butler R.P., Marcy G.W., Vogt S.S.,
Fischer D.A., Brown T.M., Laughlin G., Henry G.W.
<Astrophys. J. 634, 625 (2005)>
=2005ApJ...634..625R 2005ApJ...634..625R
ADC_Keywords: Radial velocities ; Stars, nearby ; Photometry
Keywords: planetary systems - planets and satellites: general -
stars: individual (GJ 876)
Abstract:
High-precision, high-cadence radial velocity monitoring over the past
8yr at the W. M. Keck Observatory reveals evidence for a third planet
orbiting the nearby (4.69pc) dM4 star GJ 876. The residuals of
three-body Newtonian fits, which include GJ 876 and Jupiter-mass
companions b and c, show significant power at a periodicity of
1.9379days. Self-consistently fitting the radial velocity data with a
model that includes an additional body with this period significantly
improves the quality of the fit.
Description:
We present results of N-body fits to the radial velocity data taken at
the W.M. Keck telescope from 1997 June to 2004 December.
Objects:
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RA (2000) DE Designation(s)
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22 53 16.7 -14 15 49 GJ 876 = V* IL Aqr
22 49 26.5 -11 20 57 HD 216018 = BD-12 6357
23 09 49.5 -14 30 38 HD 218639 = BD-15 6360
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 23 155 Measured Velocities for GJ 876 (Keck)
table5.dat 33 371 Photometric observations of GJ 876
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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- 10 F10.3 d HJD Heliocentric Julian Date
12- 18 F7.2 m/s RV Radial velocity
20- 23 F4.2 m/s e_RV Error in RV
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 --- HJD Heliocentric Julian Date
14- 19 F6.4 mag P-C1 Program-Comp 1 differential mag in (b+y)/2 (1)
21- 26 F6.4 mag P-C2 Program-Comp 2 differential mag in (b+y)/2 (1)
28- 33 F6.4 mag C1-C2 Comp 1-Comp 2 differential mag in (b+y)/2 (1)
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Note (1): We used HD 216018 (V=7.62, B-V=0.354) as our primary comparison
star (C1) and HD 218639 (V=6.43, B-V=0.010) as a secondary comparison
star (C2).
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 18-Sep-2006