J/A+A/451/1053 Fundamental parameters of Be stars (Fremat+, 2006)
Fundamental parameters of Be stars located in the seismology fields of COROT.
Fremat Y., Neiner C., Hubert A.-M., Floquet M., Zorec J., Janot-Pacheco E.,
Renan de Medeiros J.
<Astron. Astrophys. 451, 1053 (2006)>
=2006A&A...451.1053F 2006A&A...451.1053F
ADC_Keywords: Stars, Be ; Rotational velocities ; Effective temperatures ;
Equivalent widths
Keywords: stars: emission-line, Be - stars: activity -
stars: fundamental parameters - stars: statistics
Abstract:
In preparation for the COROT space mission, we determined the
fundamental parameters (spectral type, temperature, gravity, vsini) of
the Be stars observable by COROT in its seismology fields (64 Be
stars). We applied a careful and detailed modeling of the stellar
spectra, taking into account the veiling caused by the envelope, as
well as the gravitational darkening and stellar flattening due to
rapid rotation. Evolutionary tracks for fast rotators were used to
derive stellar masses and ages. The derived parameters will be used to
select Be stars as secondary targets (i.e. observed for 5 consecutive
months) and short-run targets of the COROT mission. Furthermore, we
note that the main part of our stellar sample is falling in the second
half of the main sequence life time, and that in most cases the
luminosity class of Be stars is inaccurate in characterizing their
evolutionary status.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 61 69 Journal of the observations
table4.dat 226 64 Veiling corrected apparent parameters
table5.dat 82 64 Fundamental parameters corrected for fast
rotation effects
table7a.dat 82 64 *List of pnrc, surface averaged, parameters
for a rotation Ω/Ωc=0.80
table7b.dat 82 64 *List of pnrc, surface averaged, parameters
for a rotation Ω/Ωc=0.90
table7c.dat 82 64 *List of pnrc, surface averaged, parameters
for a rotation Ω/Ωc=0.99
files.dat 33 59 Name of files at GAUDI server
(http://sdc.laeff.inta.es/gaudi/)
sp/* . 16 *FITS file containing plots
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Note on table7a.dat, table7b.dat, table7c.dat:
"pnrc" parameters = parameters pf the "parent non-rotating counterpart",
(i.e. parameters that the stars would have if there were rotationless),
Note on sp/*: these files do not contain actual spectra, only plots for
a visualisation (FITS and PNG formats). Most of the spectra can be
accessed from the GAUDI server (http://sdc.laeff.inta.es/gaudi/)
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See also:
B/corot : CoRoT observation log (CoRoT, 2009)
http://sdc.laeff.inta.es/gaudi/ : COROT Ground-based Asteroseismology
Uniform Database Interface
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Star designation (HD or BD)
12- 21 A10 "YYYY-MM-DD" Date Observation date
25- 28 I4 s Texp ? Time exposure
30- 44 A15 --- Instr Instrument
48- 50 I3 --- S/N ? Signal to noise ratio
52- 61 A10 --- File Name of the file including an image of the
avarage spectrum in "sp" subdirectory
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Star designation (HD/BD)
12- 21 A10 --- OName Other designation (HIP/BD/MWC)
23- 26 F4.2 mag Vmag V Magnitude
28- 38 A11 --- SpType MK spectral type
40- 44 I5 K Teff Apparent effective temperature
46- 50 I5 K e_Teff Error bar on effective temperature
52- 55 F4.2 [cm/s2] logg Apparent surface gravity
57- 60 F4.2 [cm/s2] e_logg Error bar on surface gravity
62- 64 I3 km/s vsini Apparent projected rotational velocity
66- 67 I2 km/s e_vsini Error bar on vsini
69- 77 A9 --- SpType2 Apparent MK spectral type
78- 82 F5.2 0.1nm EWHg ?=- Equivalent width of Hgamma emission
84- 87 F4.2 0.1nm e_EWHg ?=- Error bar on WHg
89- 92 F4.2 --- r ?=- Veiling parameter
94- 97 F4.2 --- e_r ?=- Estimated error bar on veiling parameter
99-226 A128 --- Other Other determinations, with references (1)
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Note (1): References as follows:
1 = Royer et al. (2002, Cat. J/A+A/393/897)
2 = Sokolov et al. (1995, Cat. J/A+AS/110/553)
3 = Abt et al. (2002, Cat. <J/A[J/573, 359>)
4 = Yudin (2001, Cat. J/A+A/368/912)
5 = Levenhagen and Leister (2004AJ....127.1176L 2004AJ....127.1176L)
6 = Chauville et al. (2001, Cat. J/A+A/378/861)
7 = Lyubinkov et al. (2002MNRAS.333....9L 2002MNRAS.333....9L)
8 = Gulati et al. (1989A&AS...80...73G 1989A&AS...80...73G)
9 = Zorec (1986, Ph.D. Thesis, Paris: Universite VII)
10 = Halbedel (1996PASP..108..833H 1996PASP..108..833H)
11 = Cidale et al. (2001A&A...368..160C 2001A&A...368..160C)
12 = Conti and Ebbets (1977ApJ...213..438C 1977ApJ...213..438C)
13 = Theodossiou (1985MNRAS.214..327T 1985MNRAS.214..327T)
14 = Slettebak (1982ApJS...50...55S 1982ApJS...50...55S)
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Star identification (HD/BD)
12- 16 I5 K Teff0.8 ? Effective temperature for Omega/Omegac=0.80
18- 21 F4.2 [cm/s2] logg0.8 ? Surface gravity (O/Oc=0.80)
23- 25 I3 km/s vsini0.8 ? Projected rotational velocity (O/Oc=0.80)
27- 28 I2 deg i0.8 ? Estimated inclination angle (O/Oc=0.80)
30- 34 I5 K Teff0.9 ? Effective temperature for Omega/Omegac=0.90
36- 39 F4.2 [cm/s2] logg0.9 ? Surface gravity (O/Oc=0.90)
41- 43 I3 km/s vsini0.9 ? Projected rotational velocity (O/Oc=0.90)
45- 46 I2 deg i0.9 ? Estimated inclination angle (O/Oc=0.90)
48- 52 I5 K Teff0.95 ? Effective temperature for Omega/Omegac=0.95
54- 57 F4.2 [cm/s2] logg0.95 ? Surface gravity (O/Oc=0.95)
59- 61 I3 km/s vsini0.95 ? Projected rotational velocity (O/Oc=0.95)
63- 64 I2 deg i0.95 ? Estimated inclination angle (O/Oc=0.95)
66- 70 I5 K Teff0.99 ? Effective temperature for Omega/Omegac=0.99
72- 75 F4.2 [cm/s2] logg0.99 ? Surface gravity (O/Oc=0.99)
77- 79 I3 km/s vsini0.99 ? Projected rotational velocity (O/Oc=0.99)
81- 82 I2 deg i0.99 ? Estimated inclination angle (O/Oc=0.99)
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Byte-by-byte Description of file: table7a.dat table7b.dat table7c.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Star designation (HD/BD)
12- 16 I5 K Teff ? Effective temperature
18- 21 I4 K e_Teff ? Error bar on Teff
23- 26 F4.2 [cm/s2] logg ? Surface gravity
28- 31 F4.2 [cm/s2] e_logg ? Error bar on logg
33- 36 F4.2 solLum Lum ? Luminosity in solar units
38- 41 F4.2 solLum e_Lum ? Error bar on the luminosity
43- 47 F5.2 solMass Mass ? Mass in solar units
49- 52 F4.2 solMass e_Mass ? Error bar on the mass
54- 62 E9.4 yr Age ? Age
64- 72 E9.4 yr e_Age ? Error bar on the age
74- 77 F4.2 --- tau ? Fractional age
79- 82 F4.2 --- e_tau ? Error bar on the fractional age
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Byte-by-byte Description of file: files.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Star designation, as in table1
12- 33 A22 --- File Name of file on GAUDI server (1)
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Note (1): GAUDI server at http://sdc.laeff.inta.es/gaudi/ .
FITS files can be retrieved from URL
http://sdc.laeff.inta.es/cgi-gaudi/SingleDownload?filename=<File>_full.fits
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Acknowledgements:
Yves Fremat, yves.fremat(at)oma.be
Coralie Neiner (Meudon Obs.) for the link to GAUDI.
(End) Patricia Vannier [CDS] 15-May-2006