J/AJ/144/114 Radial velocities of 6 field RR Lyrae (Sesar+, 2012)
Template RR Lyrae Hα, Hβ, and Hγ velocity curves.
Sesar B.
<Astron. J., 144, 114 (2012)>
=2012AJ....144..114S 2012AJ....144..114S
ADC_Keywords: Stars, variable ; Radial velocities
Keywords: stars: horizontal-branch - stars: Population II
stars: variables: RR Lyrae - techniques: radial velocities
Abstract:
We present template radial velocity curves of ab-type RR Lyrae stars
constructed from high-precision measurements of Hα, Hβ, and
Hγ lines. Amplitude correlations between the Balmer line
velocity curves, Johnson V band, and Sloan Digital Sky Survey (SDSS)
g- and r-band light curves are also derived. Compared to previous
methods, these templates and derived correlations reduce the
uncertainty in measured systemic (center-of-mass) velocities of RR
Lyrae stars by up to 15km/s, and will be of particular interest to
wide-area spectroscopic surveys such as the SDSS and LAMOST Experiment
for Galactic Understanding and Exploration.
Description:
The six field RR Lyrae type ab stars (Z Mic, CD Vel, WY Ant, DT Hya,
XZ Aps, and RV Oct) were observed between 2006 and 2009 by George W.
Preston with the echelle spectrograph of the du Pont 2.5m telescope at
the Las Campanas Observatory. The stars have V-band light-curve
amplitudes (AV) ranging from 0.64mag (Z Mic) to 1.13mag (RV Oct), as
measured by the All Sky Automated Survey (ASAS). The observations are
described in detail in For et al. (2011, cat. J/ApJS/194/38).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 71 6 ASAS RR Lyrae stars
velocity.dat 21 1925 Hα, Hβ, Hγ, and metallic
radial velocities template
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See also:
J/ApJS/194/38 : Radial velocities of 11 field RR Lyrae (For+, 2011)
J/ApJ/708/717 : Light curve templates of RR Lyrae stars (Sesar+, 2010)
J/MNRAS/377/1263 : Multiperiodic RR Lyrae in ASAS catalog (Szczygiel+, 2007)
J/A+AS/125/321 : RR Lyrae radial velocities and [Fe/H] II. (Solano+ 1997)
J/A+AS/113/483 : Photometric and RV of RRLyr stars (Carrillo+, 1997)
J/AJ/108/1016 : Kinematics of local RR lyrae stars. I. (Layden, 1994)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Name Name of the ab-type RR Lyrae star
8- 9 I2 h RAh Hour of Right Ascension (J2000)
11- 12 I2 min RAm Minute of Right Ascension (J2000)
14- 18 F5.2 s RAs Second of Right Ascension (J2000)
20 A1 --- DE- Sign of the Declination (J2000)
21- 22 I2 deg DEd Degree of Declination (J2000)
24- 25 I2 arcmin DEm Arcminute of Declination (J2000)
27- 30 F4.1 arcsec DEs Arcsecond of Declination (J2000)
32- 35 F4.2 mag Vamp V-band light-curve amplitude (from ASAS)
37- 41 F5.2 mag Vmax Maximum light in the V band from ASAS
43- 45 A3 --- Bl [Yes No] Blazhko effect in the light curve? (1)
47- 49 I3 --- N [96/241] Number of observations
51- 54 F4.1 km/s DRV1 Best-fit metallic radial velocity amplitude
56- 60 F5.1 km/s DRV2 Best-fit Hα radial velocity amplitude
62- 66 F5.1 km/s DRV3 Best-fit Hβ radial velocity amplitude
68- 71 F4.1 km/s DRV4 Best-fit Hγ radial velocity amplitude
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Note (1): Blazkhko RR Lyrae stars according to Szczygiel & Fabrycky (2007,
cat. J/MNRAS/377/1263).
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Byte-by-byte Description of file: velocity.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Line Line identification (Hα, Hβ,
Hγ, or metallic)
10- 14 F5.3 --- Phase [0/1] Phase (1)
16- 21 F6.3 km/s RV [-0.748/0.408] Normalized radial velocity
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Note (1): Calculated using periods and epochs of maximum light listed in
table 5 of For et al. (2011, cat. J/ApJS/194/38), with the time of
maximum light corresponding to phase of zero.
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History:
From electronic version of the journal
(End) Sylvain Guehenneux [CDS] 21-Jan-2014