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Projected Rotationa...
Projected Rotational Velocities of 136 Early B-type Stars in the Outer Galactic Disk
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- Garmany, C. D. (författare)
- National Optical Astronomy Observatory
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- Glaspey, J. W. (författare)
- National Optical Astronomy Observatory
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- Braganca, G. A. (författare)
- National Observatory Brazil
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- Daflon, S. (författare)
- National Observatory Brazil
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- Fernandes, M. Borges (författare)
- National Observatory Brazil
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- Oey, M. S. (författare)
- University of Michigan
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- Bensby, Thomas (författare)
- Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science
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- Cunha, K. (författare)
- University of Arizona
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(creator_code:org_t)
- 2015-07-14
- 2015
- Engelska.
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Ingår i: The Astronomical Journal. - : American Astronomical Society. - 1538-3881. ; 150:2
- Relaterad länk:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We have determined projected rotational velocities, v sin i, from Magellan/MIKE echelle spectra for a sample of 136 early B-type stars having large Galactocentric distances. The target selection was done independently of their possible membership in clusters, associations or field stars. We subsequently examined the literature and assigned each star as Field, Association, or Cluster. Our v sin i results are consistent with a difference in aggregate v sin i with stellar density. We fit bimodal Maxwellian distributions to the Field, Association, and Cluster subsamples representing sharp-lined and broad-lined components. The first two distributions, in particular, for the Field and Association are consistent with strong bimodality in v sin i. Radial velocities are also presented, which are useful for further studies of binarity in B-type stars, and we also identify a sample of possible new double-lined spectroscopic binaries. In addition, we find 18 candidate Be stars showing emission at Ha.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- stars
- emission-line
- Be
- stars: rotation
- open clusters and associations: general
- stars: early-type
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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