dc.contributor.author | Contreras Peña, C. | |
dc.contributor.author | Lucas, P.W. | |
dc.contributor.author | Froebrich, D. | |
dc.contributor.author | Kumar, M.S.N. | |
dc.contributor.author | Goldstein, J. | |
dc.contributor.author | Drew, J.E. | |
dc.contributor.author | Adamson, A.J. | |
dc.contributor.author | Davis, C.J. | |
dc.contributor.author | Barentsen, Geert | |
dc.contributor.author | Wright, N.J. | |
dc.date.accessioned | 2014-06-02T15:30:27Z | |
dc.date.available | 2014-06-02T15:30:27Z | |
dc.date.issued | 2014-04-01 | |
dc.identifier.citation | Contreras Peña , C , Lucas , P W , Froebrich , D , Kumar , M S N , Goldstein , J , Drew , J E , Adamson , A J , Davis , C J , Barentsen , G & Wright , N J 2014 , ' Extreme infrared variables from UKIDSS-I : A concentration in star-forming regions ' , Monthly Notices of the Royal Astronomical Society , vol. 439 , no. 2 , pp. 1829-1854 . https://doi.org/10.1093/mnras/stu063 | |
dc.identifier.issn | 1365-2966 | |
dc.identifier.other | ORCID: /0000-0002-8872-4462/work/62748884 | |
dc.identifier.uri | http://hdl.handle.net/2299/13588 | |
dc.description.abstract | We present initial results of the first panoramic search for high-amplitude near-infrared variability in theGalactic plane.We analyse the widely separated two-epoch K-band photometry in the fifth and seventh data releases of the UKIDSS Galactic plane survey.We find 45 stars with δK > 1 mag, including two previously known OH/IR stars and a Nova. Even though the midplane is not yet included in the data set, we find the majority (66 per cent) of our sample to be within known star-forming regions (SFRs), with two large concentrations in the Serpens OB2 association (11 stars) and the Cygnus-X complex (12 stars). Sources in SFRs show spectral energy distributions that support classification as young stellar objects (YSOs). This indicates that YSOs dominate the Galactic population of high-amplitude infrared variable stars at low luminosities and therefore likely dominate the total high-amplitude population. Spectroscopic follow up of the DR5 sample shows at least four stars with clear characteristics of eruptive premain- sequence variables, two of which are deeply embedded. Our results support the recent concept of eruptive variability comprising a continuum of outburst events with different timescales and luminosities, but triggered by a similar physical mechanism involving unsteady accretion. Also, we find what appears to be one of the most variable classical Be stars. | en |
dc.format.extent | 26 | |
dc.format.extent | 1765945 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | |
dc.subject | AGB and post-AGB-stars | |
dc.subject | Herbig Ae/Be-infrared | |
dc.subject | Low-mass-stars | |
dc.subject | Pre-main-sequence-stars | |
dc.subject | Protostars-stars | |
dc.subject | Stars | |
dc.subject | T Tauri | |
dc.subject | Variables | |
dc.title | Extreme infrared variables from UKIDSS-I : A concentration in star-forming regions | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Science & Technology Research Institute | |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.description.status | Peer reviewed | |
rioxxterms.versionofrecord | 10.1093/mnras/stu063 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |