J/A+A/537/A59 Radial velocities of gamma Cas (Nemravov+, 2012)
Properties and nature of Be stars.
29. Orbital and long-term spectral variations of gamma Cassiopeiae.
Nemravov J., Harmanec P., Koubsky P., Miroshnichenko A., Yang S.,
Slechta M., Buil C., Korcakova D., Votruba V.
<Astron. Astrophys. 537, A59 (2012)>
=2012A&A...537A..59N 2012A&A...537A..59N
ADC_Keywords: Stars, Be ; Binaries, spectroscopic ; Radial velocities
Keywords: binaries: spectroscopic - stars: early-type -
stars: emission-line, Be
Abstract:
A detailed analysis of more than 800 electronic high-resolution
spectra of gamma Cas, which were obtained during a time interval of
over 6000 days (16.84yr) at several observatories, documents the
smooth variations in the density and/or extend of its circumstellar
envelope. We found a clear anticorrelation between the peak intensity
and FWHM of the Hα emission, which seems to agree with recent models
of such emission lines.
Description:
RVs were measured by sliding of direct and mirrored line profile in
radial-velocity until the best match was achieved. This was done
manually with the program SPEFO written by Dr. Jiri Horn and
automatically with a program written by Dr. A. Miroshnichenko.
Gamma Cassiopeiae shows long-term radial-velocity changes. In order to
study variations on shorter timescales one has to remove the long-term
variations. We splitted measured RVs into subsets covering time
interval of up to 3 orbital periods P=203.52d. We fitted RVs in a
subsets with Keplerian curve and derived systemic velocity for each
subset. We fitted these systemic velocities with Hermite polynomials
and substracted the model curve from measured RVs.
Objects:
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RA (2000) DE Designation(s)
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00 56 42.5 +60 43 00 gamma Cas = HD 5394
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 27 757 Manually measured heliocentric radial-velocities
table3.dat 27 700 Automatically measured heliocentric radial-velocities
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See also:
J/A+A/324/965 : UBV photometry of V360 Lac. Paper 17. (Hill+ 1997)
J/A+A/328/551 : Radial velocities of 4 Her. Paper 18. (Koubsky+ 1997)
J/A+A/387/580 : UBV photometry of V832 Cyg. Paper 21. (Harmanec+, 2002)
J/A+A/416/669 : UBV photometry of HD 6226. Paper 22. (Bozic+, 2004)
J/A+A/419/607 : Long-term variations of kappa Dra. Paper 23. (Saad+, 2004)
J/A+A/459/849 : Radial velocities of ups Sgr. Paper 25 (Koubsky+, 2006)
Byte-by-byte Description of file: table2.dat table3.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian date
14- 19 F6.2 km/s HRV Observed heliocentric radial velocity
21- 25 F5.2 km/s O-C O-C value of heliocentric radial velocity
27 I1 --- Obs Observatory code (1)
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Note (1): Observatory code as follows:
1 = 2m telescope of the Ondrejov Observatory
2 = 1m telescope of the Ritter Observatory of Toledo University
3 = 1.22m telescope of the Dominion Astrophysical Observatory
4 = 1.93m telescope of the Observatoire de Haute Provence
5 = These spectra were downloaded from BeSS database
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Acknowledgements:
Jana Nemravova, janicka.ari(at)seznam.cz
References:
Harmanec et al., Paper 1, EW Lac 1972BAICz..23..218H 1972BAICz..23..218H
Harmanec et al., Paper 2, 88 Her 1972ApL....11..119H 1972ApL....11..119H
Harmanec et al., Paper 3, 4 Her 1973A&A....22..337H 1973A&A....22..337H
Harmanec et al., Paper 4, 88 Her 1974A&A....33..117H 1974A&A....33..117H
Heard et al., Paper 5, 4 Her 1975A&A....42...47H 1975A&A....42...47H
Harmanec et al., Paper 6, 4 Her 1976BAICz..27...47H 1976BAICz..27...47H
Doazan et al., Paper 7A, 88 Her 1982A&AS...50..481D 1982A&AS...50..481D
Doazan et al., Paper 7B, 88 Her 1982A&A...115..138D 1982A&A...115..138D
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Harmanec et al., Paper 21, V832 Cyg 2002A&A...387..580H 2002A&A...387..580H, Cat. J/A+A/387/580
Bozic et al., Paper 22, HD 6226 2004A&A...416..669B 2004A&A...416..669B, Cat. J/A+A/416/669
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Koubsky et al., Paper 25, ups Sgr 2006A&A...459..849K 2006A&A...459..849K, Cat. J/A+A/459/849
Ruzdjak et al., Paper 26, zeta Tau 2009A&A...506.1319R 2009A&A...506.1319R
Nemravova et al., Paper 27, BU Tau 2010A&A...516A..80N 2010A&A...516A..80N
Koubsky et al., Paper 28, omi Cas 2010A&A...517A..24K 2010A&A...517A..24K
(End) Patricia Vannier [CDS] 15-Dec-2011