Kinematics, abundances and origin of brightest cluster galaxies

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dc.contributor.authorCarter, D
dc.contributor.authorBridges, TJ
dc.contributor.authorHau, GKT
dc.date.accessioned2025-01-21T01:31:58Z
dc.date.available2025-01-21T01:31:58Z
dc.date.issued1999
dc.description.abstractWe present kinematic parameters and absorption line strengths for three brightest cluster galaxies, NGC 6166, 6173 and 6086. We find that NGC 6166 has a velocity dispersion profile which rises beyond 20 arcsec from the nucleus, with a halo velocity dispersion in excess of 400 km s(-1). All three galaxies show a positive and constant h(4) Hermite moment. The rising velocity dispersion profile in NGC 6166 thus indicates an increasing mass-to-light ratio. Rotation is low in all three galaxies, and NGC 6173 and 6086 show possible kinematically decoupled cores. All three galaxies have Mg-2 gradients similar to those found in normal bright ellipticals, which are not steep enough to support simple dissipative collapse models, but these could be accompanied by dissipationless mergers which would tend to dilute the abundance gradients. The [Mg/Fe] ratios in NGC 6166 and 6086 are higher than that found in NGC 6173, and if NGC 6173 is typical of normal bright ellipticals, this suggests that cDs cannot form from late mergers of normal galaxies.
dc.fuente.origenWOS
dc.identifier.issn0035-8711
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/97178
dc.identifier.wosidWOS:000081818200016
dc.issue.numero1
dc.language.isoen
dc.pagina.final148
dc.pagina.inicio131
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjectgalaxies : abundancies
dc.subjectgalaxies : elliptical and lenticular, cD
dc.subjectgalaxies : general
dc.subjectgalaxies : kinematics and dynamics
dc.titleKinematics, abundances and origin of brightest cluster galaxies
dc.typeartículo
dc.volumen307
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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