J/AJ/127/3579 Radial velocities of Hyades stars (Paulson+, 2004)
Searching for planets in the Hyades.
V. Limits on planet detection in the presence of stellar activity.
Paulson D.B., Cochran W.D., Hatzes A.P.
<Astron. J., 127, 3579-3586 (2004)>
=2004AJ....127.3579P 2004AJ....127.3579P
ADC_Keywords: Clusters, open ; Stars, nearby ; Radial velocities
Keywords: open clusters and associations: individual (Hyades) -
planetary systems - stars: activity - techniques: radial velocities
Abstract:
We present the results of a radial velocity survey of a sample of
Hyades stars and discuss the effects of stellar activity on radial
velocity measurements. The level of radial velocity scatter due to
rotational modulation of stellar surface features for the Hyades
is in agreement with the 1997 predictions of Saar and Donahue
(1997ApJ...485..319S 1997ApJ...485..319S) - the maximum radial velocity rms of up to
∼50m/s, with an average rms of ∼16m/s. In this sample of 93 stars we
find one new binary, two stars with linear trends indicative of binary
companions, and no close-in giant planets. We discuss the limits on
extrasolar planet detection in the Hyades and the constraints imposed
on radial velocity surveys of young stars.
Description:
We have been studying a sample of Hyades dwarfs ranging from spectral
classes F5 to M2 with the Keck I High-Resolution Echelle Spectrometer.
The observations and analysis of the RV data are discussed in Cochran
et al. (2002AJ....124..565C 2002AJ....124..565C).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 51 93 Star positions (from Simbad)
table1.dat 37 953 Radial Velocity Observations
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Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Star name
13- 14 I2 h RAh ? Simbad right ascension (J2000)
16- 17 I2 min RAm ? Simbad right ascension (J2000)
19- 22 F4.1 s RAs ? Simbad right ascension (J2000)
24 A1 --- DE- Simbad declination sign (J2000)
25- 26 I2 deg DEd ? Simbad declination (J2000)
28- 29 I2 arcmin DEm ? Simbad declination (J2000)
31- 32 I2 arcsec DEs ? Simbad declination (J2000)
35- 51 A17 --- SName Simbad name
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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 A10 --- Name Star name
12- 22 F11.3 d JD Julian date of observation
24- 31 F8.2 m/s RV Radial velocity
33- 37 F5.2 m/s e_RV The 1σ error in RV
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History:
From electronic version of the journal
References:
Cochran et al. Paper I 2002AJ....124..565C 2002AJ....124..565C
Paulson et al. Paper II 2002AJ....124..572P 2002AJ....124..572P
Paulson et al. Paper III 2004AJ....127.1644P 2004AJ....127.1644P
Paulson et al. Paper IV 2003AJ....125.3185P 2003AJ....125.3185P
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 13-Jan-2007