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Galaxy And Mass Assembly (GAMA) : defining passive galaxy samples and searching for the UV upturn
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dc.contributor.author | Phillipps, S | |
dc.contributor.author | Ali, S S | |
dc.contributor.author | Bremer, M N | |
dc.contributor.author | De Propris, R | |
dc.contributor.author | Sansom, A E | |
dc.contributor.author | Cluver, M E | |
dc.contributor.author | Alpaslan, M | |
dc.contributor.author | Brough, S | |
dc.contributor.author | Brown, M J I | |
dc.contributor.author | Davies, L J M | |
dc.contributor.author | Driver, S P | |
dc.contributor.author | Grootes, M W | |
dc.contributor.author | Holwerda, B W | |
dc.contributor.author | Hopkins, A M | |
dc.contributor.author | James, P A | |
dc.contributor.author | Pimbblet, K | |
dc.contributor.author | Robotham, A S G | |
dc.contributor.author | Taylor, E N | |
dc.contributor.author | Wang, L | |
dc.date.accessioned | 2020-01-14T13:30:02Z | |
dc.date.available | 2020-01-14T13:30:02Z | |
dc.date.issued | 2019-12-19 | |
dc.identifier | 265381858 | |
dc.identifier | 7fc8ecb6-d3f3-43f1-a498-d96cac8d9451 | |
dc.identifier | 85082659699 | |
dc.identifier | 000512297600042 | |
dc.identifier.citation | Phillipps , S , Ali , S S , Bremer , M N , De Propris , R , Sansom , A E , Cluver , M E , Alpaslan , M , Brough , S , Brown , M J I , Davies , L J M , Driver , S P , Grootes , M W , Holwerda , B W , Hopkins , A M , James , P A , Pimbblet , K , Robotham , A S G , Taylor , E N & Wang , L 2019 , ' Galaxy And Mass Assembly (GAMA) : defining passive galaxy samples and searching for the UV upturn ' , Monthly Notices of the Royal Astronomical Society , vol. In press , stz3552 . https://doi.org/10.1093/mnras/stz3552 | en |
dc.identifier.issn | 0035-8711 | |
dc.identifier.other | crossref: 10.1093/mnras/stz3552 | |
dc.identifier.uri | https://hdl.handle.net/10023/19274 | |
dc.description.abstract | We use data from the GAMA and GALEX surveys to demonstrate that the UV upturn, an unexpected excess of ultraviolet flux from a hot stellar component, seen in the spectra of many early-type galaxies, arises from processes internal to individual galaxies with no measurable influence from the galaxies’ larger environment. We first define a clean sample of passive galaxies without a significant contribution to their UV flux from low-level star formation. We confirm that galaxies with the optical colours of red sequence galaxies often have signs of residual star formation, which, without other information, would prevent a convincing demonstration of the presence of UV upturns. However, by including (NUV−u) and WISE (W2-W3) colours, and FUV data where it exists, we can convincingly constrain samples to be composed of non-star-forming objects. Using such a sample, we examine GALEX photometry of low redshift GAMA galaxies in a range of low-density environments, from groups to the general field, searching for UV upturns. We find a wide range of (NUV−r) colours, entirely consistent with the range seen – and attributed to the UV upturn – in low-redshift red sequence cluster galaxies. The range of colours is independent of group multiplicity or velocity dispersion, with isolated passive galaxies just as likely to have blue UV-to-optical colours, implying significant upturn components, as those in richer groups and in the previous data on clusters. This is supported by equivalent results for (FUV−r) colours which are clear indicators of upturn components. | |
dc.format.extent | 517210 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | en |
dc.subject | Galaxies: evolution | en |
dc.subject | Galaxies: stellar content | en |
dc.subject | Galaxies: star formation | en |
dc.subject | QB Astronomy | en |
dc.subject | 3rd-DAS | en |
dc.subject.lcc | QB | en |
dc.title | Galaxy And Mass Assembly (GAMA) : defining passive galaxy samples and searching for the UV upturn | en |
dc.type | Journal article | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.identifier.doi | 10.1093/mnras/stz3552 | |
dc.description.status | Peer reviewed | en |
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