III/188ivo://CDS.VizieR/III/188CDSWalborn N.R.Parker J.W.Nichols J.S.2000-12-18T19:46:46Z2000-12-18T20:43:05ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frb-starsspectroscopyultraviolet-astronomystar-atlasesThe 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.1995NASAR1363....0Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/III/188CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/83 : IUE low-dispersion spectra of normal stars (Heck+, 1984)III/115 : IUE Atlas of O-Type Stellar Spectra (Walborn+ 1985)VI/99 : Merged Log of IUE Observations (1978Jan - 1992Dec)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=III/188https://vizier.iucaa.in/viz-bin/VizieR-2?-source=III/188http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=III/188https://vizier.cds.unistra.fr/viz-bin/votable?-source=III/188https://vizier.iucaa.in/viz-bin/votable?-source=III/188http://vizieridia.saao.ac.za/viz-bin/votable?-source=III/188GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table III/188/stars (Star IDs, Spectral Types, IUE image numbers, PI names, atlas plate numbers)https://vizier.cds.unistra.fr/viz-bin/conesearch/III/188/stars?https://vizier.iucaa.in/viz-bin/conesearch/III/188/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/III/188/stars?GETtext/xml+votable180.050000true3.30916715.1836110.005555555555555556IUE6/859 1198 1430 1550 1633 3060 3251 3256 3258 9680 10731 13729 13953 14055 14305 14431 14646 14654 15392 15677 15747 19676 20107 20759 20782 20847 20915 21233 21401 21432 21438 22223 22787 22862 23007 23360 23717 23749 23979 23998 24338 24504 25659 27498 28729 28915 31121 31756 33094 33112 33113 37231 37248 37822 37932 38016 38024 38110 39831 39853 41615 41689 41692 41812 42213 42221 42283 42299 42383 42394 42410 42439 42477 42948 42959 42977 43033 43045 43086 44366https://cdsarc.cds.unistra.fr/viz-bin/moc/III/188?format=asciiUVdefaultIII/188/starsStar IDs, Spectral Types, IUE image numbers, PI names, atlas plate numbersNameName of starmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDHD/HDE or Sanduleak (Sk) number of starmeta.id;meta.maincharSimbadask the SIMBAD data-base about this objectmeta.refcharSpOptical spectral classificationsrc.spTypecharSWP_numSWP camera image number of observationmeta.idintSpectrumLink to the IUE-INES spectrummeta.refcharAper[LS] IUE Large or Small Aperturemeta.code;instr.fovcharPI_nameName of the IUE principal investigatormeta.bib.authorcharPlate_1First atlas plate showing spectrogramobs.fieldintPlate_2?Second atlas plate showing spectrogramobs.fieldintnullablePlate_3?Third atlas plate showing spectrogramobs.fieldintnullableRAJ2000Right Ascension J2000 (hours)pos.eq.ra;meta.mainDEJ2000Declination J2000 (degrees)pos.eq.dec;meta.mainIII/188/splicesSplice points of spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDHD/HDE or Sanduleak (Sk) number of starmeta.id;meta.maincharsplice1First splice point0.1nminstr.paramdoublesplice2?Second splice point0.1nminstr.paramdoublenullablesplice3?Third splice point0.1nminstr.paramdoublenullablesplice4?Fourth splice point0.1nminstr.paramdoublenullablesplice5?Fifth splice point0.1nminstr.paramdoublenullablesplice6?Sixth splice point0.1nminstr.paramdoublenullablesplice7?Seventh splice point0.1nminstr.paramdoublenullablesplice8?Eighth splice point0.1nminstr.paramdoublenullable