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One-micron spectroscopy of normal OB stars

Conti, PS; Howarth, ID; (1999) One-micron spectroscopy of normal OB stars. Monthly Notices of the Royal Astronomical Society , 302 (1) 145 - 151. 10.1046/j.1365-8711.1999.02105.x. Green open access

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Abstract

We have obtained spectra of 70 normal OB stars in the near-IR I (1-μm) band. The strongest features are those due to lines of the hydrogen Paschen series and neutral and ionized helium, which are, for the most part, in absorption. The information content in this spectral range is sufficient for only a rough classification of hot stars into `early O', `late O' and `B' types. Curiously, the leading He i triplet line, He i λ1.0830 μm, is usually not detectable, although in a few stars it is in emission; its behaviour generally correlates with the leading helium singlet line, He i λ 2.058 μ m. These two features appear to be present in emission only in stars with extremes of mass loss or wind extension.

Type: Article
Title: One-micron spectroscopy of normal OB stars
Open access status: An open access version is available from UCL Discovery
DOI: 10.1046/j.1365-8711.1999.02105.x
Publisher version: http://dx.doi.org/10.1046/j.1365-8711.1999.02105.x
Language: English
Additional information: © 1999 RAS Definitive versions of articles pre-2013 are available at http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2966, now published by http://mnras.oxfordjournals.org
Keywords: micron, spectroscopy, stars
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/144353
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