J/ApJ/727/117 Radial velocities of four exoplanet candidates (Meschiari+, 2011)
The Lick-Carnegie survey: four new exoplanet candidates.
Meschiari S., Laughlin G., Vogt S.S., Butler R.P., Rivera E.J.,
Haghighipour N., Jalowiczor P.
<Astrophys. J., 727, 117 (2011)>
=2011ApJ...727..117M 2011ApJ...727..117M
ADC_Keywords: Radial velocities ; Stars, double and multiple ; Stars, nearby ;
Planets
Keywords: methods: numerical - planets and satellites: detection
Abstract:
We present new precise HIRES radial velocity (RV) data sets of five
nearby stars obtained at Keck Observatory. HD 31253, HD 218566, HD
177830, HD 99492, and HD 74156 are host stars of spectral classes F
through K and show RV variations consistent with new or additional
planetary companions in Keplerian motion. The orbital parameters of
the candidate planets in the five planetary systems span minimum
masses of Msini=27.43M☉ to 8.28MJ, periods of 17.05-4696.95
days and eccentricities ranging from circular to extremely eccentric
(e∼0.63). The fifth star, HD 74156, was known to have both a 52 day
and a 2500 day planet, and was claimed to also harbor a third planet
at 336 days, in apparent support of the "Packed Planetary System"
hypothesis. Our greatly expanded data set for HD 74156 provides strong
confirmation of both the 52 day and 2500 day planets, but strongly
contradicts the existence of a 336 day planet, and offers no
significant evidence for any other planets in the system.
Description:
We have been monitoring a large set of nearby stars under precise RV
survey with the High Resolution Echelle Spectrometer (HIRES) at Keck
for the past 17 years. In this paper, we present new RV observations
for five of our target stars: HD 31253, HD 218566, HD 177830, HD 99492,
and HD 74156.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 40 5 Star parameters (from tables 1 and 2)
table3.dat 36 305 KECK radial velocities
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See also:
V/130 : Geneva-Copenhagen Survey of Solar neighbourhood III (Holmberg+, 2009)
J/ApJ/719/890 : Keck radial velocities of GJ 876 (Rivera+, 2010)
J/ApJ/723/954 : HIRES radial velocities of GJ 581 (Vogt+, 2010)
J/ApJ/705/1226 : Planet-bearing stars in Spitzer (Bryden+, 2009)
J/ApJS/182/97 : Radial velocities of multi-planet systems (Wittenmyer+, 2009)
J/ApJS/168/297 : Stellar parameters of nearby cool stars (Takeda+, 2007)
J/ApJ/646/505 : Catalog of nearby exoplanets (Butler+, 2006)
J/ApJS/159/141 : Spectroscopic properties of cool stars. I. (Valenti+, 2005)
J/ApJS/152/261 : Chromospheric Ca II emission in nearby stars (Wright+, 2004)
J/A+A/414/351 : ELODIE survey for northern extrasolar planets (Naef+, 2004)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Star identification
11- 14 A4 --- SpT MK spectral type
16- 19 F4.2 Msun Mass Mass
20 A1 --- r_Mass [d] d: Takeda et al. (2007, Cat. J/ApJS/168/297)
22- 29 F8.3 d Pera Period
30 A1 --- f_Pera [a] a: New planet candidate
32- 39 F8.3 d Perb ? Second period
40 A1 --- f_Perb [a] a: New planet candidate
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Star identification
11- 23 F13.5 d BJD Barycentric Julian Date
25- 31 F7.2 m/s RV Radial velocity
33- 36 F4.2 m/s e_RV Uncertainty in RV
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 31-Aug-2012