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J/ApJS/186/175      Far-UV spectroscopic atlas of B stars          (Smith, 2010)

A detailed far-ultraviolet spectral atlas of main-sequence B stars. Smith M.A. <Astrophys. J. Suppl. Ser., 186, 175-190 (2010)> =2010ApJS..186..175S
ADC_Keywords: Atlases ; Spectra, ultraviolet ; Stars, B-type ; Line Profiles Keywords: atlases - line: identification - stars: early-type ultraviolet: stars Abstract: We have constructed a detailed spectral atlas covering the wavelength region 930-1225Å for 10 sharp-lined B0-B9 stars near the main sequence. Most of the spectra we assembled are from the archives of the Far Ultraviolet Spectroscopic Explorer satellite, but for nine stars, wavelength coverage above 1188Å was taken from high-resolution International Ultraviolet Explorer or echelle Hubble Space Telescope/Space Telescope Imaging Spectrograph spectra. To represent the tenth star at type B0.2V, we used the Copernicus atlas of tau Sco. We made extensive line identifications in the region 949-1225Å of all atomic features having published oscillator strengths at types B0, B2, and B8. These are provided as a supplementary data product-hence the term detailed atlas. Our list of found features totals 2288, 1612, and 2469 lines, respectively. We were able to identify 92%, 98%, and 98% of these features with known atomic transitions with varying degrees of certainty in these spectra. The remaining lines do not have published oscillator strengths. Photospheric lines account for 94%, 87%, and 91%, respectively, of all our identifications, with the remainder being due to interstellar (usually molecular H2) lines. We also discuss the numbers of lines with respect to the distributions of various ions for these three most studied spectral subtypes. A table is also given of 162 least blended lines that can be used as possible diagnostics of physical conditions in B star atmospheres. Description: Data reprocessings of IUE and STIS echelle spectra were completed in 1997 and 2006, respectively. The FUSE data were reprocessed with CalFUSE version 3.2 (Dixon et al., 2007PASP..119..527D) during 2007-2008. These spectra were ingested into the MAST archive, and we retrieved them from this facility. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 54 10 Star sample tableb0.dat 44 2289 Line identifications in B0 spectra tableb2.dat 44 1612 Line identifications in B2 spectra tableb8.dat 44 2468 Line identifications in B8 spectra
See also: VI/129 : The FUSE Observation Log (FUSE, 1999-2007) III/188 : IUE Atlas of B-Type Stellar Spectra (Walborn+ 1995) : Mutimission Archive at STScI (MAST) homepage Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 9 A9 --- Name Star name for which FUSE spectra were used 10- 11 A2 --- f_Name [*C ] Flag on object (1) 13- 20 A8 --- SpT MK Spectral type 22- 25 F4.2 --- E(B-V) ? Interstellar reddening 27- 31 I5 K Teff Effective temperature 33- 41 A9 --- SStar Name of star when a HST/STIS or IUE spectrum was used. See section 2.2 for further details. 42 A1 --- f_SStar [*] Flag on the second star (1) 44- 48 A5 --- SpT2 MK Spectral type of the second star 50- 54 I5 K Teff2 ? Effective temperature of the second star
Note (1): Flags as follows: * = stars for which spectral templates were adopted to identify atomic and ISM lines. C = exclusive use of the Copernicus atlas data (Rogerson et al., 1977STIN...7820024R) for tau Sco (not FUSE).
Byte-by-byte Description of file: tableb*.dat
Bytes Format Units Label Explanations
2- 4 I3 --- fSp Presence of line in B0(1), B2(2), B8 9- 16 F8.3 0.1nm lambda1 ? B0, B2 or B8 primary wavelength (1) 21- 28 F8.3 0.1nm lambda2 ? Secondary (member) wavelength (1) 33- 38 A6 --- Ion Ion identification ("UN" for unknown) 39 A1 --- u_Ion Uncertainty flag (:) on ion identification 41- 44 A4 --- ISM "ISM" for interstellar line, "pISM" for lines that may appear in photosphere and ISM.
Note (1): only one of the columns is filled: the line is either the primary or member of a line group.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 19-Apr-2010
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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