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J/A+A/537/A120      Rotational velocities of A-type stars. IV. (Zorec+, 2012)

Rotational velocities of A-type stars. IV. Evolution of rotational velocities. Zorec J., Royer F. <Astron. Astrophys. 537, A120 (2012)> =2012A&A...537A.120Z
ADC_Keywords: Stars, A-type ; Stars, B-type ; Rotational velocities ; Stars, masses ; Stars, ages Keywords: stars: early-type - stars: rotation - stars: evolution Abstract: In previous works of this series, we have shown that late B- and early A-type stars have genuine bimodal distributions of rotational velocities and that late A-type stars lack slow rotators. The distributions of the surface angular velocity ratio Omega/Omegacrit (Omegacrit is the critical angular velocity) have peculiar shapes according to spectral type groups, which can be caused by evolutionary properties. We aim to review the properties of these rotational velocity distributions in some detail as a function of stellar mass and age. We have gathered vsini for a sample of 2014 B6- to F2-type stars. We have determined the masses and ages for these objects with stellar evolution models. The (Teff,logL/L)-parameters were determined from the uvby-beta photometry and the HIPPARCOS parallaxes. Description: Fundamental parameters for 2014 B6- to F2-type stars are presented. For each star, spectral type, effective temperature, luminosity, mass, age and projected rotational velocity are given, as well as remarks about their multiplicity and chemical peculiarity. The projected rotational velocities are taken from different sources and homogenized to the same scale. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 84 2014 Fundamental parameters for 2014 B6 to F2-type stars
See also: III/22 : Rotation of Evolving A and F Stars (Danziger+ 1972) III/226 : Rotational Velocities of Stars (Glebocki+ 2000) J/A+AS/118/545 : Rotational velocities of F dwarfs (Groot+, 1996) J/ApJ/573/359 : Rotational velocities of B stars from BSC (Abt+, 2002) J/A+A/398/647 : Rotational velocities of F and G stars (Reiners+, 2003) 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+A/463/671 : Rotational velocities of A-type stars. III. (Royer+, 2007) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HD Star HD number 8- 22 A15 --- SpType MK spectral type 24- 28 F5.3 [K] logT Logarithmic effective temperature 30- 34 F5.3 [K] e_logT Error on logT 36- 42 F7.4 [Lsun] logL Logarithmic luminosity 44- 49 F6.4 [Lsun] e_logL Error on logL 51- 54 F4.2 Msun Mass Stellar mass 56- 59 F4.2 Msun e_Mass Error on the stellar mass 61- 65 F5.3 --- Age Fractional age on the main sequence 67- 71 F5.3 --- e_Age Error on the fractional age 73- 75 I3 km/s vsini Projected rotational velocity 77- 78 I2 --- r_vsini Source of vsini (1) 80- 84 A5 --- Class Classification of the star: blank=normal, CB=Close binary, CP=chemically peculiar
Note (1): Source of vsini as follows: 1 = Royer et al. (2007, Cat. J/A+A/463/671) 2 = Royer et al. (2007, Cat. J/A+A/463/671) 3 = Royer et al. (2007, Cat. J/A+A/463/671) 4 = Royer et al. (2007, Cat. J/A+A/463/671) 8 = Abt et al. (2002, Cat. J/ApJ/573/359) 16 = Levato & Grosso (2004IAUS..215...51L) 32 = Huang et al. (2010ApJ...722..605H)
Acknowledgements: Frederic Royer, frederic.royer(at) References: Royer et al., Paper I 2002A&A...381..105R, Cat. J/A+A/381/105 Royer et al., Paper II 2002A&A...393..897R, Cat. J/A+A/393/897 Royer et al., Paper III 2007A&A...463..671R, Cat. J/A+A/463/671
(End) Frederic Royer [Obs. Paris], Patricia Vannier [CDS] 08-Dec-2011
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