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J/A+A/384/473 O, B and Be stars equivalent widths (Lenorzer+, 2002)
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An atlas of 2.4 to 4.1 mum ISO/SWS spectra of early-type stars
Lenorzer A., Vandenbussche B., Morris P., de Koter A., Geballe T.,
Waters L.B.F.M., Hony S., Kaper L.
<Astron. Astrophys. 384, 473 (2002)>
=2002A&A...384..473L
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ADC_Keywords: Stars, early-type ; Stars, normal ; Stars, Be ;
Equivalent widths ; Spectra, infrared
Keywords: line: identification - atlases - stars: early-type -
stars: fundamental parameters - infrared: stars
Abstract:
We present an atlas of spectra of O- and B-type stars, obtained with
the Short Wavelength Spectrometer (SWS) during the Post-Helium program
of the Infrared Space Observatory (ISO). This program is aimed at
extending the Morgan & Keenan (1973ARA&A..11...29M) classification
scheme into the near-infrared. Later type stars will be discussed in a
separate publication. The observations consist of 57 SWS Post-Helium
spectra from 2.4 to 4.1{mu}m, supplemented with 10 spectra acquired
during the nominal mission with a similar observational setting. For
B-type stars, this sample provides ample spectral coverage in terms of
subtype and luminosity class. For O-type stars, the ISO sample is
coarse and therefore is complemented with 8 UKIRT L'-band
observations. In terms of the presence of diagnostic lines, the
L'-band is likely the most promising of the near-infrared atmospheric
windows for the study of the physical properties of B stars.
Specifically, this wavelength interval contains the Br{alpha},
Pf{gamma}, and other Pfund lines which are probes of spectral type,
luminosity class and mass loss. Here, we present simple empirical
methods based on the lines present in the 2.4 to 4.1{mu}m interval
that allow the determination of i) the spectral type of B dwarfs and
giants to within two subtypes; ii) the luminosity class of B stars to
within two classes; iii) the mass-loss rate of O stars and B
supergiants to within 0.25dex.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea3.dat 69 17 Equivalent widths of helium lines in
normal O- and B-type stars
tablea4.dat 76 41 Equivalent widths of hydrogen lines in
normal O- and B- type stars
tablea5.dat 98 19 Equivalent widths of hydrogen lines of
B emission line stars (no stands for not measured)
tablea6.dat 90 12 Equivalent widths of helium, oxygen and iron lines
of B emission line stars
tables.tex 134 174 LaTeX version of the tables
tables.ps 72 554 PostScript version of the tables
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Byte-by-byte Description of file: tablea3.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Star name
16- 22 A7 --- SpType Spectal type
24- 26 F3.1 0.1nm HeI(6f-4d) ? HeI(6f-4d) 2.6192{mu}m equivalent width
28- 30 F3.1 0.1nm e_HeI(6f-4d) ? rms uncertainty on HeI(6f-4d) ?
32- 35 F4.1 0.1nm HeII(9-7) ? HeII(9-7) 2.8260{mu}m equivalent width
37- 39 F3.1 0.1nm e_HeII(9-7) ? rms uncertainty on HeII(9-7)
41- 45 F5.1 0.1nm HeII(7-6) ? HeII(7-6) 3.0917{mu}m equivalent width
47- 49 F3.1 0.1nm e_HeII(7-6) ? rms uncertainty on HeII(7-6)
53- 55 F3.1 0.1nm HeI(5d-4p) ? HeI(5d-4p) 3.7036{mu}m equivalent width
57- 59 F3.1 0.1nm e_HeI(5d-4p) ? rms uncertainty on HeI(5d-4p)
63- 65 F3.1 0.1nm HeI(5f-4d) ? HeI(5f-4d) 4.0377{mu}m equivalent width
67- 69 F3.1 0.1nm e_HeI(5f-4d) ? rms uncertainty on HeI(5f-4d)
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Byte-by-byte Description of file: tablea4.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Star name
16- 22 A7 --- SpType Spectal type
24- 27 F4.1 0.1nm Br{beta} ? Brackett {beta} 2.6258{mu}m equivalent width
29- 31 F3.1 0.1nm e_Br{beta} ? rms uncertainty on Br{beta}
33- 35 F3.1 0.1nm Pf(13-5) ? Pfund (13-5) 2.6751{mu}m equivalent width
37- 39 F3.1 0.1nm e_Pf(13-5) ? rms uncertainty on Pf(13-5)
41- 43 F3.1 0.1nm Pf(11-5) ? Pfund (11-5) 2.8730{mu}m equivalent width
45- 47 F3.1 0.1nm e_Pf(11-5) ? rms uncertainty on Pf(11-5)
49- 52 F4.1 0.1nm Pf{beta} ? Pfund {beta} 3.2970{mu}m equivalent width
54- 56 F3.1 0.1nm e_Pf{beta} ? rms uncertainty on Pf{beta}
58- 61 F4.1 0.1nm Pf{gamma} ? Pfund {gamma} 3.7406{mu}m equivalent width
63- 65 F3.1 0.1nm e_Pf{gamma} ? rms uncertainty on Pf{gamma}
68- 72 F5.1 0.1nm Br{alpha} ? Brackett {alpha} 4.0523{mu}m equivalent width
74- 76 F3.1 0.1nm e_Br{alpha} ? rms uncertainty on Br{alpha}
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Byte-by-byte Description of file: tablea5.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Star name
16- 23 A8 --- SpType Spectal type
25- 30 F6.1 0.1nm Br{beta} ? Brackett {beta} 2.6258{mu}m equivalent width
32- 34 F3.1 0.1nm e_Br{beta} ? rms uncertainty on Br{beta}
36- 40 F5.1 0.1nm Pf(13-5) ? Pfund (13-5) 2.6751{mu}m equivalent width
41 A1 --- n_Pf(13-5) [n] n: no
42- 44 F3.1 0.1nm e_Pf(13-5) ? rms uncertainty on Pf(13-5)
46- 50 F5.1 0.1nm Pf(11-5) ? Pfund (11-5) 2.8730{mu}m equivalent width
52- 54 F3.1 0.1nm e_Pf(11-5) ? rms uncertainty on Pf(11-5)
56- 60 F5.1 0.1nm Pf{delta} ? Pfund {delta} 3.2970{mu}m equivalent width
61 A1 --- n_Pf{delta} [n] n: no
62- 64 F3.1 0.1nm e_Pf{delta} ? rms uncertainty on Pf{delta}
66- 70 F5.1 0.1nm Pf{gamma} ? Pfund {gamma} 3.7406{mu}m equivalent width
72- 75 F4.1 0.1nm e_Pf{gamma} ? rms uncertainty on Pf{gamma}
77- 81 F5.1 0.1nm Hu(14-6) ? Humphreys (14-6) 4.0209{mu}m equivalent width
83- 86 F4.1 0.1nm e_Hu(14-6) ? rms uncertainty on Hu(14-6)
88- 93 F6.1 0.1nm Br{alpha} ? Brackett {alpha} 4.0523{mu}m equivalent width
95- 98 F4.1 0.1nm e_Br{alpha} ? rms uncertainty on Br{alpha}
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Byte-by-byte Description of file: tablea6.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Star name
16- 23 A8 --- SpType Spectal type
25- 28 F4.1 0.1nm HeI1 ? He I 2.6192{mu}m equivalent width
30- 32 F3.1 0.1nm e_HeI1 ? rms uncertainty on HeI1
34- 37 F4.1 0.1nm OI1 ? O I 2.8935{mu}m equivalent width
39- 41 F3.1 0.1nm e_OI1 ? rms uncertainty on OI1
43- 47 F5.1 0.1nm FeII1 ? Fe II 3.0813{mu}m equivalent width
49- 51 F3.1 0.1nm e_FeII1 ? rms uncertainty on FeII1
53- 56 F4.1 0.1nm OI2 ? O I 3.6617{mu}m equivalent width
58- 60 F3.1 0.1nm e_OI2 ? rms uncertainty on OI2
62- 65 F4.1 0.1nm HeI2 ? He I 3.7036{mu}m equivalent width
67- 69 F3.1 0.1nm e_HeI2 ? rms uncertainty on HeI2
71- 75 F5.1 0.1nm FeII2 ? Fe II 3.9378{mu}m equivalent width
77- 79 F3.1 0.1nm e_FeII2 ? rms uncertainty on FeII2
81- 85 F5.1 0.1nm HeI3 ? He I 4.0377{mu}m equivalent width
87- 90 F4.1 0.1nm e_HeI3 ? rms uncertainty on HeI3
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Acknowledgements: Annique Lenorzer <lenorzer@astro.uva.nl>
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(End) Patricia Bauer [CDS] 11-Jan-2002