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A study of the B and Be star population in the field of the LMC open cluster NGC 2004 with VLT-FLAMES

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A study of the B and Be star population in the field of the LMC open cluster NGC 2004 with VLT-FLAMES

dc.contributor.author	Martayan, C.
dc.contributor.author	Hubert, A.M.
dc.contributor.author	Floquet, M.
dc.contributor.author	Fabregat Llueca, Juan
dc.contributor.author	Frémat, Y.
dc.contributor.author	Neiner, C.
dc.contributor.author	Stee, P.
dc.contributor.author	Zorec, J.
dc.date.accessioned	2010-07-13T08:12:27Z
dc.date.available	2010-07-13T08:12:27Z
dc.date.issued	2006
dc.identifier.citation	Martayan, C., Hubert, A.M., Floquet, M., Fabregat, J., Frémat, Y., Neiner, C., Stee, P., Zorec, J. A study of the B and Be star population in the field of the LMC open cluster NGC 2004 with VLT-FLAMES. En: Astronomy and Astrophysics, 2006, vol. 445, no. 3, January III, p. 931-937	en
dc.identifier.uri	http://hdl.handle.net/10550/15999
dc.description.abstract	Observations of hot stars belonging to the young cluster LMC-NGC 2004 and its surrounding region have been obtained with the VLT-GIRAFFE facilities in MEDUSA mode. 25 Be stars were discovered; the proportion of Be stars compared to B-type stars is found to be of the same order in the LMC and in the Galaxy fields. 23 hot stars were discovered as spectroscopic binaries (SB1 and SB2), 5 of these are found to be eclipsing systems from the MACHO database, with periods of a few days. About 75% of the spectra in our sample are polluted by hydrogen (H$\alpha $ and H$\gamma$), [S II] and [N II] nebular lines. These lines are typical of H II regions. They could be associated with patchy nebulosities with a bi-modal distribution in radial velocity, with higher values (+335 km s-1) preferentially seen inside the southern part of the known bubble LMC4 observed in H I at 21 cm.	en_US
dc.language.iso	en	en
dc.subject	Stars: early-type ; Stars: emission-line, Be ; Galaxies: Magellanic Clouds ; Stars: binaries: spectroscopic ; Stars: binaries: eclipsing ; ISM: lines and bands	en
dc.title	A study of the B and Be star population in the field of the LMC open cluster NGC 2004 with VLT-FLAMES	en
dc.type	journal article	es_ES
dc.subject.unesco	UNESCO::ASTRONOMÍA Y ASTROFÍSICA	en
dc.identifier.doi	10.1051/0004-6361:20052760	en
dc.identifier.idgrec	030385	en
dc.type.hasVersion	VoR	es_ES
dc.identifier.url	http://www.aanda.org/articles/aa/pdf/2006/03/aa2760-05.pdf	en