Journal Article

A search for star formation around the Galactic halo B-type star PHL 346 with the 2dF spectrograph

B. B. Lynn, P. L. Dufton, F. P. Keenan, N. C. Hambly, M. J. Irwin, G. Gilmore and W. R. J. Rolleston

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 336, issue 4, pages 1287-1292
Published in print November 2002 | ISSN: 0035-8711
Published online November 2002 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1046/j.1365-8711.2002.05866.x
A search for star formation around the Galactic halo B-type star PHL 346 with the 2dF spectrograph

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Abstract

A preliminary search for stars that may have formed coevally with the apparently young halo B-type star PHL 346 has been performed with the 2dF multifibre spectrograph on the Anglo-Australian Telescope (AAT). Candidates were selected for spectroscopy from APM scans of B and R Schmidt plates centred on PHL 346. A total of 476 stars of spectral type A or F were found; radial velocity estimates and more accurate spectral type assignments narrowed the number of possible coeval candidates to 6 A-type and 14 F-type stars. A statistical analysis of these results using a comparison with a control field suggests that the number of A-type or F-type candidate stars around PHL 346 is not unexpected, and that they need not be associated with PHL 346. A number of ways to improve the project are suggested.

Keywords: stars: early-type; stars: formation; stars: individual: PHL 346; stars: kinematics; Galaxy: halo

Journal Article.  4411 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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