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III/188 IUE Atlas of B-Type Stellar Spectra (Walborn+ 1995)
The following files can be converted to FITS (extension .fit .fgz or .fiZ)
stars.dat spectra.dat splices.dat
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Query from: http://vizier.cds.unistra.fr/cgi-bin/VizieR?-source=III/188
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-r--r--r-- 1 cats archive 1346012 Sep 13 1995 spectra.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html]
-r--r--r-- 1 cats archive 7032 Sep 13 1995 splices.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html]
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Beginning of ReadMe :III/188 IUE Atlas of B-Type Stellar Spectra (Walborn+ 1995)
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International Ultraviolet Explorer Atlas of B-type Spectra from 1200 to 1900 A
Walborn N.R., Parker J.W., Nichols J.S.
<NASA Reference Publication #1363 (1995)>
=1995NASAR1363....0W
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ADC_Keywords: Stars, B-type ; Spectra, ultraviolet ; Atlases
Mission_Name: IUE
Abstract:
The IUE Atlas of B-type Stellar Spectra is an atlas of B-type spectra
consisting of short-wavelength, high-resolution data from the
International Ultraviolet Explorer archive, designed to complement the
widely used O-star atlas from the same source (Walborn,
Nichols-Bohlin, & Panek 1985, NASA Reference Publication 1155,
catalog III/115). The atlas presented here completes the OB natural
group, i.e., to spectral type B3 for the main sequence and giants,
type B5 at class Ib, and B8 at Ia, which is also the most relevant
domain for stellar-wind effects among normal B-type spectra.
Introduction:
A primary objective of the IUE Atlas of B-type Stellar Spectra is to
chart in detail the gradual disappearance of the stellar-wind features
in normal spectra as a function of spectral type and luminosity class.
As in the O-star atlas, which first demonstrated the strong correlation
between the optical spectral types and the UV wind behaviour in the
majority of the stars, the principal selection criterion was the
existence of high-weight optical spectral classifications, which are
quoted here without any revisions based upon the UV data. Some peculiar
categories also are presented including a number of hypergiants, stars
of types BN/BC (and including three of type O9.7 acquired since the O
Atlas), and stars with enhanced winds. 86 images have been selected from
the IUE archive for the atlas. The processing and presentation is as
similar as possible to the O-star atlas, with the SWP data (roughly
1200-1900 angstrom range) rectified and rebinned to a uniform resolution
of 0.25 angstrom.
The conclusions from the B Star Atlas are similar to those from the O
Star Atlas, namely, that the UV stellar-wind features display strong
systematic trends as a functions of spectral type and luminosity class,
and a high degree of correlation with the optical classifications as the
winds decline toward the later types. A somewhat higher rate of
exceptions to these correlations can be recognized among the B spectra
(11%) than the O (2%), but they remain a small fractions of the total
sample and do not prevent clear delineation of the normal behaviour.
Indeed, it is only as a result of the latter that the exceptions can be
identified and described.