Show simple item record

Files in this item

Thumbnail

Item metadata

dc.contributor.authorKhosroshahi, Habib G.
dc.contributor.authorRaouf, Mojtaba
dc.contributor.authorMiraghaei, Halime
dc.contributor.authorBrough, Sarah
dc.contributor.authorCroton, Darren J.
dc.contributor.authorDriver, Simon
dc.contributor.authorGraham, Alister
dc.contributor.authorBaldry, Ivan
dc.contributor.authorBrown, Michael
dc.contributor.authorPrescott, Matt
dc.contributor.authorWang, Lingyu
dc.date.accessioned2018-01-22T13:30:05Z
dc.date.available2018-01-22T13:30:05Z
dc.date.issued2017-06-20
dc.identifier.citationKhosroshahi , H G , Raouf , M , Miraghaei , H , Brough , S , Croton , D J , Driver , S , Graham , A , Baldry , I , Brown , M , Prescott , M & Wang , L 2017 , ' Galaxy And Mass Assembly (GAMA) : a 'No Smoking' zone for giant elliptical galaxies? ' , Astrophysical Journal , vol. 842 , no. 2 , 81 . https://doi.org/10.3847/1538-4357/aa7048en
dc.identifier.issn0004-637X
dc.identifier.otherPURE: 252097982
dc.identifier.otherPURE UUID: 78dcece9-4195-4adf-acf5-a819b4bdbee3
dc.identifier.otherArXiv: http://arxiv.org/abs/1704.09029v1
dc.identifier.otherScopus: 85021378801
dc.identifier.urihttps://hdl.handle.net/10023/12563
dc.description.abstractWe study the radio emission of the most massive galaxies in a sample of dynamically relaxed and unrelaxed galaxy groups from the Galaxy and Mass Assembly survey. The dynamical state of the group is defined by the stellar dominance of the brightest group galaxy (BGG), e.g., the luminosity gap between the two most luminous members, and the offset between the position of the BGG and the luminosity centroid of the group. We find that the radio luminosity of the largest galaxy in the group strongly depends on its environment, such that the BGGs in dynamically young (evolving) groups are an order of magnitude more luminous in the radio than those with a similar stellar mass but residing in dynamically old (relaxed) groups. This observation has been successfully reproduced by a newly developed semi-analytic model that allows us to explore the various causes of these findings. We find that the fraction of radio-loud BGGs in the observed dynamically young groups is ~2 times that of the dynamically old groups. We discuss the implications of this observational constraint on the central galaxy properties in the context of galaxy mergers and the super massive black hole accretion rate.
dc.format.extent9
dc.language.isoeng
dc.relation.ispartofAstrophysical Journalen
dc.rights© 2017, American Astronomical Society. This work has been made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at https://doi.org/10.3847/1538-4357/aa7048en
dc.subjectGalaxies: activeen
dc.subjectGalaxies: elliptical and lenticular, cDen
dc.subjectGalaxies: groups: generalen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.subject3rd-DASen
dc.subject.lccQBen
dc.subject.lccQCen
dc.titleGalaxy And Mass Assembly (GAMA) : a 'No Smoking' zone for giant elliptical galaxies?en
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.identifier.doihttps://doi.org/10.3847/1538-4357/aa7048
dc.description.statusPeer revieweden
dc.identifier.urlhttp://arxiv.org/abs/1704.09029v1en


This item appears in the following Collection(s)

Show simple item record