Show simple item record

dc.contributor.authorThompson, Mark
dc.contributor.authorUrquhart, J.S.
dc.contributor.authorMoore, T.J.T.
dc.contributor.authorMorgan, L.K.
dc.date.accessioned2013-04-18T12:09:33Z
dc.date.available2013-04-18T12:09:33Z
dc.date.issued2012-03-01
dc.identifier.citationThompson , M , Urquhart , J S , Moore , T J T & Morgan , L K 2012 , ' The statistics of triggered star formation : an overdensity of massive young stellar objects around Spitzer bubbles ' , Monthly Notices of the Royal Astronomical Society , vol. 421 , no. 1 , pp. 408-418 . https://doi.org/10.1111/j.1365-2966.2011.20315.x
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 652113
dc.identifier.otherPURE UUID: 2b21c991-6aa3-4334-be7c-5e92290217eb
dc.identifier.otherBibtex: urn:454f2e32100998d8f9ae8fa05132d2ff
dc.identifier.otherScopus: 84858006282
dc.identifier.otherORCID: /0000-0001-5392-909X/work/30970806
dc.identifier.urihttp://hdl.handle.net/2299/10467
dc.description.abstractWe present a detailed statistical study of massive star formation in the environment of 322 Spitzer mid-infrared bubbles by using the Red MSX Source (RMS) survey for massive young stellar objects (YSOs). Using a combination of simple surface density plots and a more sophisticated angular cross-correlation function analysis, we show that there is a statistically significant overdensity of RMS YSOs towards the bubbles. There is a clear peak in the surface density and angular cross-correlation function of YSOs projected against the rim of the bubbles. By investigating the autocorrelation function of the RMS YSOs, we show that this is not due to intrinsic clustering of the RMS YSO sample. RMS YSOs and Spitzer bubbles are essentially uncorrelated with each other beyond a normalized angular distance of two bubble radii. The bubbles associated with RMS YSOs tend to be both smaller and thinner than those that are not associated with YSOs. We interpret this tendency to be due to an age effect, with YSOs being preferentially found around smaller and younger bubbles. We find no evidence to suggest that the YSOs associated with the bubbles are any more luminous than the rest of the RMS YSO population, which suggests that the triggering process does not produce a top-heavy luminosity function or initial mass function. We suggest that it is likely that the YSOs were triggered by the expansion of the bubbles and estimate that the fraction of massive stars in the Milky Way formed by this process could be between 14 and 30 per centen
dc.format.extent11
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.rightsOpen
dc.subjectstars: formation, ISM: bubbles, H II regions, infrared: ISM
dc.titleThe statistics of triggered star formation : an overdensity of massive young stellar objects around Spitzer bubblesen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Accepted Version
dcterms.dateAccepted2012-03-01
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1111/j.1365-2966.2011.20315.x
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record