dc.contributor.author | Sale, S.E. | |
dc.contributor.author | Drew, J.E. | |
dc.contributor.author | Knigge, C. | |
dc.contributor.author | Zijlstra, A.A. | |
dc.contributor.author | Irwin, M.J. | |
dc.contributor.author | Morris, R.A.H. | |
dc.contributor.author | Phillipps, S. | |
dc.contributor.author | Drake, J. | |
dc.contributor.author | Greimel, R. | |
dc.contributor.author | Unruh, Y.C. | |
dc.contributor.author | Groot, P. | |
dc.contributor.author | Mampaso, A. | |
dc.contributor.author | Walton, N.A. | |
dc.date.accessioned | 2010-06-30T08:01:45Z | |
dc.date.available | 2010-06-30T08:01:45Z | |
dc.date.issued | 2010 | |
dc.identifier.citation | Sale , S E , Drew , J E , Knigge , C , Zijlstra , A A , Irwin , M J , Morris , R A H , Phillipps , S , Drake , J , Greimel , R , Unruh , Y C , Groot , P , Mampaso , A & Walton , N A 2010 , ' The structure of the outer Galactic disc as revealed by IPHAS early A stars ' , Monthly Notices of the Royal Astronomical Society , vol. 402 , no. 2 , pp. 713-723 . https://doi.org/10.1111/j.1365-2966.2009.15746.x | |
dc.identifier.issn | 0035-8711 | |
dc.identifier.other | PURE: 181221 | |
dc.identifier.other | PURE UUID: 480d5e72-1426-48c5-b2ac-1f44a7ea18d2 | |
dc.identifier.other | dspace: 2299/4600 | |
dc.identifier.other | Scopus: 77949336746 | |
dc.identifier.uri | http://hdl.handle.net/2299/4600 | |
dc.description | ‘The definitive version is available at www3.interscience.wiley.com '. Copyright Royal Astronomical Society. | |
dc.description.abstract | This study is an investigation of the stellar density profile of the Galactic disc in the anticentre direction. We select over 40 000 early A stars from INT/WFC Photometric Hα Survey of the Northern Galactic Plane (IPHAS) photometry in the Galactic longitude range 160° < l < 200° close to the equatorial plane (−1° < b < +1°) . We then compare their observed reddening-corrected apparent magnitude distribution with simulated photometry obtained from parametrized models in order to set constraints on the anticentre stellar density profile. By selecting A stars, we are appraising the properties of a population only ∼100 Myr old. We find that the stellar density profile of young stars is well fit to an exponential with length-scale of (3020 ± 120statistical± 180systematic) pc , which is comparable to that obtained in earlier studies, out to a Galactocentric radius of RT= (13.0 ± 0.5statistical± 0.6systematic) kpc . At larger radii, the rate of decline appears to increase with the scalelength dropping to (1200 ± 300statistical± 70systematic) pc. This result amounts to a refinement of the conclusions reached in previous studies that the stellar density profile is abruptly truncated. The IPHAS A star data are not compatible with models that propose a sudden change in metallicity at RG= 10 kpc . | en |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | |
dc.title | The structure of the outer Galactic disc as revealed by IPHAS early A stars | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Science & Technology Research Institute | |
dc.contributor.institution | Centre for Astrophysics Research | |
dc.description.status | Peer reviewed | |
rioxxterms.versionofrecord | https://doi.org/10.1111/j.1365-2966.2009.15746.x | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |