J/A+A/465/993 Spectral atlas of massive stars around He I (Groh+, 2007)
Spectral atlas of massive stars around He I 10830Å.
Groh J.H., Damineli A., Jablonski F.
<Astron. Astrophys. 465, 993 (2007)>
=2007A&A...465..993G 2007A&A...465..993G
ADC_Keywords: Stars, early-type ; Stars, Be ; Spectra, infrared
Keywords: atlases - stars: emission-line, Be - stars: Wolf-Rayet -
stars: winds, outflows - stars: early-type
Abstract:
We present a digital atlas of peculiar, high-luminosity massive stars
in the near-infrared region (10470-11000Å) at medium resolution
(R∼7000). The spectra are centered around HeI 10830Å, which is
formed in the wind of those stars, and is a crucial line to obtain
their physical parameters. The instrumental configuration also sampled
a rich variety of emission lines of FeII, MgII, CI, NI, and
Paγ. Secure identifications for most spectral lines are given,
based on synthetic atmosphere models calculated by our group. We also
propose that two unidentified absorption features have interstellar
and/or circumstellar origin. For the strongest one (10780Å) an
empirical calibration between E(B-V) and equivalent width is provided.
The atlas displays the spectra of massive stars organized in four
categories, namely Be stars, OBA Iape (or luminous blue variables, LBV
candidates and ex/dormant LBVs), OB supergiants and Wolf-Rayet stars.
For comparison, the photospheric spectra of non emission-line stars
are presented. Selected LBVs were observed in different epochs from
2001 to 2004, and their spectral variability reveals that some stars,
such as eta Car, AG Car and HR Car, suffered dramatic spectroscopic
changes during this time interval.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 181 40 Basic data for the program stars
refs.dat 72 15 References
sp/* . 60 Individual spectra
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1 A1 --- Type Type (class) of star (1)
3- 13 A11 --- Star Star name
15- 20 I6 --- HD ? HD number
22- 23 I2 h RAh Right ascension (J2000)
25- 26 I2 min RAm Right ascension (J2000)
28- 31 F4.1 s RAs Right ascension (J2000)
33 A1 --- DE- Declination sign (J2000)
34- 35 I2 deg DEd Declination (J2000)
37- 38 I2 arcmin DEm Declination (J2000)
40- 43 F4.1 arcsec DEs Declination (J2000)
45- 60 A16 --- SpType Spectral type
61- 63 I3 km/s vsini ? Projected rotational velocity,
for Be stars only
65 A1 --- Neb? [y/n] Presence of a circumstellar nebula,
for LBVs and related objects only
67- 82 A16 --- Refs References
84- 96 A13 --- FileName1 First spectrum filename in subdirectory sp
98-107 A10 "YYYY/MM/DD" ObsDate1 First observation date
109-120 A12 --- FileName2 Second spectrum filename in subdirectory sp
122-131 A10 "YYYY/MM/DD" ObsDate2 Second observation date
133-145 A13 --- FileName3 Third spectrum filename in subdirectory sp
147-156 A10 "YYYY/MM/DD" ObsDate3 Third observation date
158-170 A13 --- FileName4 Fourth spectrum filename in subdirectory sp
172-181 A10 "YYYY/MM/DD" ObsDate4 Fourth observation date
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Note (1): Type as follows:
1 = Be stars
2 = LBVs, LBV candidates and ex/dormant LBVs
3 = OB Supergiants
4 = Wolf-Rayet stars
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Ref Reference code
8- 26 A19 --- BibCode BibCode
28- 48 A21 --- Aut Author's name
51- 72 A22 --- Com Comments
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Acknowledgements:
Jose Henrique Groh, jgroh(at)mpifr-bonn.mpg.de
(End) Patricia Vannier [CDS] 05-Apr-2007