J/A+A/398/647 Rotational velocities of F and G stars (Reiners+, 2003)
Rotation and differential rotation in field F- and G-type stars
Reiners A., Schmitt J.H.M.M
<Astron. Astrophys. 398, 647 (2003)>
=2003A&A...398..647R 2003A&A...398..647R
ADC_Keywords: Stars, F-type ; Stars, G-type ; Rotational velocities ;
Abundances, peculiar
Keywords: stars: rotation - stars: late-type - stars: activity
Abstract:
We present a detailed study of rotation and differential rotation
analyzing high resolution high S/N spectra of 142 F-, G- and early
K-type field stars. Using Least Squares Deconvolution we obtain
broadening profiles for our sample stars and use the Fourier transform
method to determine projected rotational velocities vsini.
Distributions of rotational velocities and periods are studied in the
HR-diagram. For a subsample of 32 stars of spectral type F0-G0 we
derive the amount of differential rotation. We find evidence for
differential rotation in ten of the 32 stars.
The observations were done with the ESO 3.6m telescope at La Silla,
Chile, in October 2000, October 2001 and April 2002.
The CES instrument (resolution 235000) was used, in the wavelength
regions 577-581nm and 322.5-627nm.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 100 32 Subsample observed data
tablea1.dat 67 142 Projected rotational velocities
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See also:
III/226 : Rotational Velocities of Stars (Glebocki+ 2000)
J/A+A/381/105 : Rotational velocities of A-type stars. I. (Royer+, 2002)
J/A+A/393/897 : Rotational velocities of A-type stars II. (Royer+, 2002)
J/A+AS/118/545 : Rotational velocities of F dwarfs (Groot+, 1996)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD Henry Draper catalogue (Cat. III/135) number
11- 14 F4.2 mag VMAG Absolute V magnitude (1)
18- 21 I4 K Teff Effective temperature (1)
25- 28 F4.1 pc Dist Distance (2)
32- 35 F4.2 solRad Rad Radius (3)
39- 42 F4.1 d P/sini Projected period (4)
46- 49 F4.2 --- q2/q1 Ratio of second to first Fourier zeros
53- 56 F4.2 --- e_q2/q1 Error of q2/q1
60- 63 F4.2 --- alpha Amount of differential rotation
alpha/sqrt(sini)
67 A1 --- nealpha [-] Sign of e_alpha (5)
68- 71 F4.2 --- e_alpha Error of alpha (5)
75 A1 --- l_loge(Li) Limit flag on Li abundance (6)
78- 81 F4.2 --- loge(Li) ? Li abundance (H=12)
84 A1 --- r_loge(Li) [DEFGH] Reference of Li abundance (7)
87- 91 F5.2 --- logR'HK ? CaII HK emission (8)
95- 99 F5.2 --- logLX/Lbol ? Normalized X-ray emission (9)
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Note (1): calculated from Stroemgren photometry (1998A&AS..129..431H 1998A&AS..129..431H)
Note (2): derived from HIPPARCOS parallax
Note (3): calculated from Teff and MV (Cox, 2000S&T...100a..72C 2000S&T...100a..72C)
Note (4): calculated from R and vsini
Note (5): negative e_alpha means that q2/q1 is consistent with anti-solar
differential rotation
Note (6): "<" indicates that log(epsilon(Li)) is upper limit
Note (7): Sources:
D: Cutispoto et al. (2002, J/A+A/384/491)
E: Balachandran (1990ApJ...354..310B 1990ApJ...354..310B)
F: Boesgaard & Trippicco (1986ApJ...303..724B 1986ApJ...303..724B)
G: Boesgaard & Lavery (1986ApJ...309..762B 1986ApJ...309..762B)
H: Chen et al. (2001, J/A+A/371/943)
Note (8): logR'HK is defined in Noyes et al. 1984ApJ...279..763N 1984ApJ...279..763N
and represents a relative emission flux value in the H&K lines;
the values from Baliunas et al., 1995ApJ...438..269B 1995ApJ...438..269B were used.
Note (9): Huensch et al., 1998, J/A+AS/132/155 and 1999, J/A+AS/135/319,
except HD89449 (ROSAT PSPC data, IX/30)
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD Henry Draper Catalogue (Cat. III/135) number
12- 15 I4 --- HR ? Bright Star Catalogue (Cat. V/50) number
20- 32 A13 --- Name Name
45- 48 F4.2 mag B-V B-V colour index (1)
52 A1 -- l_vsini Limit flag on vsini (2)
54- 57 F4.1 km/s vsini Projected rotational velocity
63- 66 F4.1 km/s e_vsini Error on vsini
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Note (1): B-V from Bright Star Catalogue (Cat. V/50)
Note (2): "<" indicates that vsini is upper limit
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Acknowledgements: Ansgar Reiners
(End) Patricia Bauer [CDS] 20-Dec-2002