The accretion histories of brightest cluster galaxies from their stellar population gradients
dc.contributor.author | Oliva-Altamirano, Paola | |
dc.contributor.author | Brough, Sarah | |
dc.contributor.author | Jimmy, . | |
dc.contributor.author | Tran, Kim-Vy | |
dc.contributor.author | Couch, Warrick | |
dc.contributor.author | McDermid, Richard M | |
dc.contributor.author | Lidman, Christopher | |
dc.contributor.author | von der Linden, Anja | |
dc.contributor.author | Sharp, Robert | |
dc.date.accessioned | 2015-12-10T23:36:35Z | |
dc.date.issued | 2015 | |
dc.date.updated | 2015-12-10T11:55:21Z | |
dc.description.abstract | We analyse the spatially resolved stellar populations of nine local (z < 0.1) Brightest Cluster Galaxies (BCGs) observed with VIMOS in Integral Field Unit mode. Our sample is composed of seven slow-rotating and two fast-rotating BCGs. We do not find a connection between stellar kinematics and stellar populations in this small sample. The BCGs have shallow metallicity gradients (median Δ[Fe/H]=-0.11 ± 0.1), high central metallicities (median [Fe/H]<inf>[α/Fe] = 0</inf> = 0.13 ± 0.07), and a wide range of central ages (from 5 to 15 Gyr). We propose that the reason for this is diverse evolutionary paths in BCGs. 67 per cent of the sample (6/9) show ~7 Gyr old central ages, which reflects an active accretion history, and 33 per cent of the sample (3/9) have central ages older than 11 Gyr, which suggest no star formation since z = 2. The BCGs show similar central stellar populations and stellar population gradients to early-type galaxies of similar mass (M<inf>dyn</inf> > 1011.3M⊙) from the ATLAS3D survey (median [Z/H] = 0.04 ± 0.07, Δ[Z/H] = -0.19 ± 0.1). However, massive early-type galaxies from ATLAS3D have consistently old ages (median Age = 12.0 ± 3.8 Gyr). We also analyse the close massive companion galaxies of two of the BCGs. These galaxies have similar stellar populations to their respective BCGs. | |
dc.identifier.issn | 0035-8711 | |
dc.identifier.uri | http://hdl.handle.net/1885/70202 | |
dc.publisher | Blackwell Publishing Ltd | |
dc.rights | Author/s retain copyright | en_AU |
dc.source | Monthly Notices of the Royal Astronomical Society | |
dc.title | The accretion histories of brightest cluster galaxies from their stellar population gradients | |
dc.type | Journal article | |
dcterms.accessRights | Open Access | en_AU |
local.bibliographicCitation.issue | 4 | |
local.bibliographicCitation.lastpage | 3359 | |
local.bibliographicCitation.startpage | 3347 | |
local.contributor.affiliation | Oliva-Altamirano, Paola, Swinburne University of Technology | |
local.contributor.affiliation | Brough, Sarah, Australian Astronomical Observatory | |
local.contributor.affiliation | Jimmy, ., Texas A&M University | |
local.contributor.affiliation | Tran, Kim-Vy, Texas A&M University | |
local.contributor.affiliation | Couch, Warrick, Swinburne University of Technology | |
local.contributor.affiliation | McDermid, Richard M, Macquarie University | |
local.contributor.affiliation | Lidman, Christopher, Australian Astronomical Observatory | |
local.contributor.affiliation | von der Linden, Anja, University of Copenhagen | |
local.contributor.affiliation | Sharp, Robert, College of Physical and Mathematical Sciences, ANU | |
local.contributor.authoremail | u4954956@anu.edu.au | |
local.contributor.authoruid | Sharp, Robert, u4954956 | |
local.description.notes | Imported from ARIES | |
local.identifier.absfor | 020100 - ASTRONOMICAL AND SPACE SCIENCES | |
local.identifier.ariespublication | a383154xPUB2251 | |
local.identifier.citationvolume | 449 | |
local.identifier.doi | 10.1093/mnras/stv475 | |
local.identifier.scopusID | 2-s2.0-84930020174 | |
local.identifier.uidSubmittedBy | a383154 | |
local.type.status | Published Version |
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