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dc.contributor.authorLedo, H.R.
dc.contributor.authorSarzi, M.
dc.contributor.authorDotti, M.
dc.contributor.authorKhochfar, S.
dc.contributor.authorMorelli, L.
dc.date.accessioned2011-03-03T10:32:18Z
dc.date.available2011-03-03T10:32:18Z
dc.date.issued2010
dc.identifier.citationLedo , H R , Sarzi , M , Dotti , M , Khochfar , S & Morelli , L 2010 , ' A census of nuclear stellar discs in early-type galaxies ' , Monthly Notices of the Royal Astronomical Society , vol. 407 , no. 2 , pp. 969-985 . https://doi.org/10.1111/j.1365-2966.2010.16990.x
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 137324
dc.identifier.otherPURE UUID: acc36fc6-2c4e-404d-8330-282fb916d452
dc.identifier.otherdspace: 2299/5422
dc.identifier.otherScopus: 77956408628
dc.identifier.urihttp://hdl.handle.net/2299/5422
dc.descriptionThe definitive version can be found at: http://onlinelibrary.wiley.com/ Copyright Royal Astronomical Society
dc.description.abstractNuclear stellar discs (NSDs), of a few tens to hundreds of parsec across, are a common and yet poorly studied feature of early-type galaxies. Still, such small discs represent a powerful tool to constrain the assembling history of galaxies, since they can be used to trace to the epoch when galaxies experienced their last major merger event. By studying the fraction and stellar age of NSDs, it is thus possible to test the predictions for the assembly history of early-type galaxies according to the current hierarchical paradigm for galaxy formation. In this paper we have produced the most comprehensive census of NSDs in nearby early-type galaxies by searching for such discs in objects within 100 Mpc and by using archival images from the Hubble Space Telescope. We found that NSDs are present in approximately 20 per cent of early-type galaxies, and that the fraction of galaxies with NSDs depends neither on their Hubble type nor on their galactic environment, whereas the incidence of NSDs appears to decline in the most massive systems. Furthermore, we have separated the light contribution of 12 such discs from that of their surrounding stellar bulge in order to extract their physical properties. This doubles the number of decomposed NSDs and although the derived values for their central surface brightness and scalelength are consistent with previous studies, they also give a hint of possible different characteristics due to different formation scenario between nuclear discs and other kinds of large galactic discs.en
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.subjectgalaxies: bulges
dc.subjectgalaxies: elliptical and lenticular
dc.subjectcD
dc.subjectgalaxies: evolution
dc.subjectgalaxies: formation
dc.titleA census of nuclear stellar discs in early-type galaxiesen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
rioxxterms.versionofrecordhttps://doi.org/10.1111/j.1365-2966.2010.16990.x
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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