Spectroscopic follow-up of ultraviolet-excess objects selected from the UVEX survey
Verbeek K, Groot PJ, Scaringi S, Napiwotzki R, Spikings B, Ostensen RH, Drew JE, Steeghs D, Casares J, Corral-Santana JM, Corradi RLM, Deacon N, Drake JJ, Gaensicke BT, Gonzalez-Solares E, Greimel R, Heber U, Irwin MJ, Knigge C, Nelemans G (2012)
Publication Type: Journal article
Publication year: 2012
Journal
Book Volume: 426
Pages Range: 1235-1261
Journal Issue: 2
DOI: 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) ≤ 0.7mag. 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. © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS.
Authors with CRIS profile
Involved external institutions
Radboud University Nijmegen
Netherlands (NL)
University of Hertfordshire
United Kingdom (GB)
Katholieke Universiteit Leuven (KUL) / Catholic University of Leuven
Belgium (BE)
University of Warwick
United Kingdom (GB)
Instituto de Astrofísica de Canarias (IAC)
Spain (ES)
University of Hawaii (U.H.)
United States (USA) (US)
Harvard-Smithsonian Center for Astrophysics (CfA)
United States (USA) (US)
University of Cambridge
United Kingdom (GB)
Karl-Franzens-Universität Graz
Austria (AT)
University of Southampton
United Kingdom (GB)
Netherlands (NL)
University of Hertfordshire
United Kingdom (GB)
Katholieke Universiteit Leuven (KUL) / Catholic University of Leuven
Belgium (BE)
University of Warwick
United Kingdom (GB)
Instituto de Astrofísica de Canarias (IAC)
Spain (ES)
University of Hawaii (U.H.)
United States (USA) (US)
Harvard-Smithsonian Center for Astrophysics (CfA)
United States (USA) (US)
University of Cambridge
United Kingdom (GB)
Karl-Franzens-Universität Graz
Austria (AT)
University of Southampton
United Kingdom (GB)
How to cite
APA:
Verbeek, K., Groot, P.J., Scaringi, S., Napiwotzki, R., Spikings, B., Ostensen, R.H.,... Nelemans, G. (2012). Spectroscopic follow-up of ultraviolet-excess objects selected from the UVEX survey. Monthly Notices of the Royal Astronomical Society, 426(2), 1235-1261. https://doi.org/10.1111/j.1365-2966.2012.21615.x
MLA:
Verbeek, Kars, et al. "Spectroscopic follow-up of ultraviolet-excess objects selected from the UVEX survey." Monthly Notices of the Royal Astronomical Society 426.2 (2012): 1235-1261.
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