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Spectroscopic follow-up of ultraviolet-excess objects selected from the UVEX survey
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(2012) Spectroscopic follow-up of ultraviolet-excess objects selected from the UVEX survey. Monthly Notices of the Royal Astronomical Society, Vol.426 (No.2). pp. 1235-1261. doi:10.1111/j.1365-2966.2012.21615.x ISSN 0035-8711.
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Official URL: http://dx.doi.org/10.1111/j.1365-2966.2012.21615.x
Abstract
We present the results of the first spectroscopic follow-up of 132 optically blue ultraviolet (UV)-excess sources selected from the UV-Excess Survey of the Northern Galactic Plane (UVEX). The UV-excess spectra are classified into different populations and grids of model spectra are fitted to determine spectral types, temperatures, surface gravities and reddening. From this initial spectroscopic follow-up 95 per cent of the UV-excess candidates turn out to be genuine UV-excess sources such as white dwarfs, white dwarf binaries, subdwarf types O and B, emission-line stars and quasi stellar objects. The remaining sources are classified as slightly reddened main-sequence stars with spectral types later than A0V. The fraction of DA white dwarfs is 47 per cent with reddening smaller than E(B − V) ≤ 0.7 mag. Relations between the different populations and their UVEX photometry, Galactic latitude and reddening are shown. A larger fraction of UVEX white dwarfs is found at magnitudes fainter than g > 17 and Galactic latitude smaller than |b| < 4 compared to main-sequence stars, blue horizontal branch stars and subdwarfs.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QB Astronomy | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Library of Congress Subject Headings (LCSH): | Stars, Galaxies -- Structure | ||||
Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||
Publisher: | Wiley | ||||
ISSN: | 0035-8711 | ||||
Official Date: | 2012 | ||||
Dates: |
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Volume: | Vol.426 | ||||
Number: | No.2 | ||||
Page Range: | pp. 1235-1261 | ||||
DOI: | 10.1111/j.1365-2966.2012.21615.x | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Date of first compliant deposit: | 23 December 2015 | ||||
Date of first compliant Open Access: | 23 December 2015 | ||||
Funder: | Nederlandse Organisatie voor Wetenschappelijk Onderzoek [Netherlands Organisation for Scientific Research] (NWO) | ||||
Grant number: | 614.000.601 (NWO) |
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