J/A+A/434/1125 B-type Supergiants in the SMC (Dufton+, 2005)
B-type Supergiants in the SMC:
Chemical Compositions and comparison of static and unified models.
Dufton P.L., Ryans R.S.I., Trundle, C., Lennon D.J., Hubeny I., Lanz T.,
Allende Prieto C.
<Astron. Astrophys. 434, 1125 (2005)>
=2005A&A...434.1125D 2005A&A...434.1125D
ADC_Keywords: Stars, supergiant ; Stars, B-type ; Equivalent widths
Keywords: galaxies: Magellanic Clouds - stars: abundances - stars: early-type -
stars: supergiants
Abstract:
High-resolution UCLES/AAT spectra are presented for nine B-type
supergiants in the SMC, chosen on the basis that they may show varying
amounts of nuclear-synthetically processed material mixed to their
surface. These spectra have been analysed using a new grid of
approximately 12000 non-LTE line blanketed TLUSTY model atmospheres
to estimate atmospheric parameters and chemical composition.
Description:
Table 4 contains the adopted atomic data, equivalent widths and
abundance estimates for all the metal lines observed in the SMC
supergiants. It also contains data for the SMC near main sequence
star AzV 304, which has been used in a differential analysis.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 60 10 Observational summary of the nine program stars
and AzV 304
table4.dat 49 274 Equivalent Widths Measurements and line-by-line
abundances for SMC supergiants and AzV 304
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See also:
J/A+A/304/347 : 40 field red supergiants in the SMC (Meliani+, 1995)
J/A+A/324/435 : Chemical composition of 6 K supergiants in the SMC (Hill, 1997)
J/A+AS/30/261 : UBV and Radial Velocities of SMC Supergiants (Ardeberg+, 1977)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 A7 -- Name Star name
11- 12 I2 h RAh Right ascension (J2000.0), from Simbad
14- 15 I2 min RAm Right ascension (J2000.0), from Simbad
17- 20 F4.1 s RAs Right ascension (J2000.0), from Simbad
22 A1 --- DE- Declination sign (J2000.0), from Simbad
23- 24 I2 deg DEd Declination (J2000.0), from Simbad
26- 27 I2 arcmin DEm Declination (J2000.0), from Simbad
29- 30 I2 arcsec DEs Declination (J2000.0), from Simbad
33- 37 F5.2 mag Vmag Visual V magnitude
39- 45 A7 --- SpType MK spectral type
49- 51 I3 --- S/N ? Signal-to-noise ratio
53- 55 I3 km/s HRV ? Heliocentric radial velocity
57- 59 I3 km/s FWHM ? FWHM of the metal absorption line spectrum
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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- 7 A7 -- Name Star name
9- 14 A6 --- Spec Ionic species of the element
16- 22 F7.2 0.1nm Lambda Rest wavelength of the spectral line
23 A1 --- n_Lambda [B] B: the feature is a close doublet
27- 32 F6.3 eV Exc Excitation of the lower level of the transition
For close doublets the mean value is given
35- 39 F5.2 --- loggf Logarithm of the oscillator strength times
degeneracy of the lower level. For doublets
the value is the sum of the components
41- 44 I4 0.1pm EW Equivalent width of the star spectral lines
46- 49 F4.2 --- Abund Abundance estimate (1)
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Note (1): Abundance are on the logarithmic scale H=12
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Acknowledgements: Philip Dufton, p.dufton(at)qub.ac.uk
(End) Philip Dufton [QUB, United Kingdom], Patricia Vannier [CDS] 28-Jan-2005