Probing the intra-group medium of a z=0.28 galaxy group

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dc.contributor.authorBielby, R.
dc.contributor.authorCrighton, N. H. M.
dc.contributor.authorFumagalli, M.
dc.contributor.authorMorris, S. L.
dc.contributor.authorStott, J. P.
dc.contributor.authorTejos, N.
dc.contributor.authorCantalupo, S.
dc.date.accessioned2024-01-10T12:41:47Z
dc.date.available2024-01-10T12:41:47Z
dc.date.issued2017
dc.description.abstractWe present new MUSE observations of a galaxy group probed by a background quasar. The quasar sightline passes between multiple z = 0.28 galaxies, whilst showing at the same redshift low-ionized metal line species, including Ca II, Mg I, Mg II and Fe II. Based on the galaxy redshifts measured from the MUSE data, we estimate the galaxies to be part of a small galaxy group with a halo mass of approximate to 6 x 10(12) M-circle dot. We use the MUSE data to reveal the two-dimensional dynamical properties of the gas and stars in the group galaxies, and relate these to the absorber kinematics. With these data, we consider a number of scenarios for the nature of the gas probed by the sightline absorbers: a corotating gas halo associated with a single galaxy within the group; outflowing material from a single group member powered by recent star-formation; and cool dense gas associated with an intra-group medium. We find that the dynamics, galaxy impact parameters, star formation rates and the absorber strength suggest that the cool gas cannot be clearly associated with any single galaxy within the group. Instead, we find that the observations are consistent with a superposition of cool gas clouds originating with the observed galaxies as they fall into the group potential, and are now likely in the process of forming the intra-group medium.
dc.description.funderScience and Technologies Funding Council
dc.description.funderHintze Research Fellowship
dc.description.funderComision Nacional de Investigacion Cientifica y Tecnologica
dc.description.funderNational Aeronautics and Space Administration
dc.description.funderScience and Technology Facilities Council
dc.fechaingreso.objetodigital2024-04-29
dc.format.extent14 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/stx528
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/stx528
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/77450
dc.identifier.wosidWOS:000399429600008
dc.information.autorucFísica;Tejos N;S/I;1040238
dc.issue.numero2
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final1386
dc.pagina.inicio1373
dc.publisherOXFORD UNIV PRESS
dc.revistaMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
dc.rightsacceso restringido
dc.subjectgalaxies: groups: general
dc.subjectgalaxies: kinematics and dynamics
dc.subjectquasars: absorption lines
dc.subjectSTAR-FORMING GALAXIES
dc.subjectLYMAN-ALPHA ABSORBERS
dc.subjectAPPROXIMATE-TO 2.4
dc.subjectMG II ABSORBERS
dc.subjectLY-ALPHA
dc.subjectINTERGALACTIC MEDIUM
dc.subjectCIRCUMGALACTIC MEDIUM
dc.subjectCROSS-CORRELATION
dc.subjectZCOSMOS GALAXIES
dc.subjectNEUTRAL HYDROGEN
dc.titleProbing the intra-group medium of a z=0.28 galaxy group
dc.typeartículo
dc.volumen468
sipa.codpersvinculados1040238
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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