J/A+A/393/897 Rotational velocities of A-type stars II. (Royer+, 2002)
Rotational velocities of A-type stars.
II. Measurement of vsini in the northern hemisphere.
Royer F., Grenier S., Baylac M.-O., Gomez A.E., Zorec J.
<Astron. Astrophys. 393, 897 (2002)>
=2002A&A...393..897R 2002A&A...393..897R
ADC_Keywords: Rotational velocities ; Stars, early-type
Keywords: techniques: spectroscopic - stars: early-type; rotation
Abstract:
This work is the second part of the set of measurements of vsini for
A-type stars, begun by Royer et al. (2002, Cat. J/A+A/381/105).
Spectra of 249 B8 to F2-type stars brighter than V=7 have been
collected at Observatoire de Haute- Provence (OHP). Fourier transforms
of several line profiles in the range 4200-4600 A are used to derive
vsini from the frequency of the first zero. Statistical analysis of
the sample indicates that measurement error mainly depends on vsini
and this relative error of the rotational velocity is found to be
about 5% on average. The systematic shift with respect to standard
values from Slettebak et al. (1975ApJS...29..137S 1975ApJS...29..137S), previously found
in the first paper, is here confirmed. Comparisons with data from the
literature agree with our findings: vsini values from Slettebak et al.
are underestimated and the relation between both scales follows a
linear law vsini(new)=1.03*vsini(old)+7.7. Finally, these data are
combined with those from the previous paper (Royer et al., 2002, Cat.
J/A+A/381/105), together with the catalogue of Abt & Morrell
(1995ApJS...99..135A 1995ApJS...99..135A). The resulting sample includes some 2150 stars
with homogenized rotational velocities.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 41 250 Results of the vsini measurements
table9.dat 31 2151 Results of the merging of vsini samples
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See also:
J/A+A/381/105 : Rotational velocities of A-type stars. I. (Royer+, 2002)
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD HD (Cat. III/135) number
8- 13 I6 --- HIP ? HIP (Cat. I/239) number
15- 25 A11 --- SpType MK spectral type
27- 29 I3 km/s vsini ? Rotational velocity, vsini
30 A1 --- u_vsini Colon indicating uncertainty in vsini
32- 33 I2 km/s e_vsini ? Standard deviation associated to vsini
35- 37 I3 --- o_vsini ? Number of measured lines
39- 40 A2 --- Remark Coded note (1)
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Note (1): Note:
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
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Byte-by-byte Description of file: table9.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD HD (Cat. III/135) number
8- 13 I6 --- HIP ? HIP (Cat. I/239) number
15- 25 A11 --- SpType MK spectral type
27- 29 I3 km/s vsini Rotational velocity, vsini
31 I1 --- Member Subsamples indicating trace of the membership (1)
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Note (1): Subsamples:
1: Royer et al. (2002, Cat. J/A+A/381/105)
2: this work
3: 1 and 2
4: Abt & Morrell (1995ApJS...99..135A 1995ApJS...99..135A)
5: 1 and 4
6: 2 and 4
7: 1 and 2 and 4
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Acknowledgements: Frederic Royer
(End) Patricia Bauer [CDS] 04-Oct-2002