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J/A+A/381/105         Rotational velocities of A-type stars. I.   (Royer+, 2002)

Rotational velocities of A-type stars. I. Measurement of vsini in the southern hemisphere. Royer F., Gerbaldi M., Faraggiana R., Gomez A.E. <Astron. Astrophys., 381, 105 (2002)> =2002A&A...381..105R
ADC_Keywords: Stars, early-type ; Stars, A-type ; Rotational velocities ; Velocity dispersion Keywords: techniques: spectroscopic - stars: early-type - stars: rotation Abstract: Within the scope of a Key Programme determining fundamental parameters of stars observed by HIPPARCOS, spectra of 525 B8 to F2-type stars brighter than V=8 have been collected at ESO. Fourier transforms of several line profiles in the range 4200-4500Å are used to derive vsini from the frequency of the first zero. Statistical analysis of the sample indicates that measurement error is a function of vsini and this relative error of the rotational velocity is found to be about 6% on average. The results obtained are compared with data from the literature. There is a systematic shift from standard values from Slk75, which are 10 to 12% lower than our findings. Comparisons with other independent vsini values tend to prove that those from Slettebak et al. (1975ApJS...29..137S) are underestimated. This effect is attributed to the presence of binaries in the standard sample of Slettebak et al. (1975ApJS...29..137S), and to the model atmosphere they used. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 40 525 Results of the vsini measurements
See also: III/226 : Rotational Velocities of Stars (Glebocki+ 2000) J/A+A/335/183 : Pleiades low-mass stars rotational velocities (Queloz+ 1998) J/A+AS/126/21 : Velocities and duplicity of F-type dwarfs (Nordstroem+ 1997) J/A+AS/139/433 : RV and vsini of evolved stars (de Medeiros+ 1999) J/MNRAS/284/265 : Rotational Velocities of 373 OB stars (Howarth+ 1997) Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HD HD number 8- 13 I6 --- HIP ? HIP number 15- 25 A11 --- SpType MK Spectral type 27- 29 I3 km/s vsini vsini 30 A1 --- u_vsini Uncertainty flag on vsini 32- 33 I2 km/s sigma ? Standard deviation associated to vsini 35- 37 I3 --- o_vsini Number of measured lines 39- 40 A2 --- Remark See Note (1)
Note (1): Remarks: SB: double line spectral binary star SH: shell star NO: uncertain vsini, no selected lines SS: uncertain vsini, variable from spectrum to spectrum LL: uncertain vsini, variable from line to line
Acknowledgements: Frederick Royer
(End) PAtricia Bauer [CDS] 18-Dec-2001
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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