Photometric Decomposition of Barred Galaxies

Simple item page
dc.creatorReese, A. S.
dc.creatorWilliams, T. B.
dc.creatorSellwood, J. A.
dc.creatorBarnes, Eric I.
dc.creatorPowell, Brian A.
dc.date2007-02-27
dc.date.accessioned2026-07-07T11:21:14Z
dc.date.available2026-07-07T11:21:14Z
dc.descriptionWe present a non-parametric method for decomposition of the light of disk galaxies into disk, bulge and bar components. We have developed and tested the method on a sample of 68 disk galaxies for which we have acquired I-band photometry. The separation of disk and bar light relies on the single assumption that the bar is a straight feature with a different ellipticity and position angle from that of the projected disk. We here present the basic method, but recognise that it can be significantly refined. We identify bars in only 47% of the more nearly face-on galaxies in our sample. The fraction of light in the bar has a broad range from 1.3% to 40% of the total galaxy light. If low-luminosity galaxies have more dominant halos, and if halos contribute to bar stability, the luminosity functions of barred and unbarred galaxies should differ markedly; while our sample is small, we find only a slight difference of low significance.
dc.descriptionAccepted to appear in AJ, 36 pages, 9 figures, full on-line figures available at http://www.physics.rutgers.edu/~sellwood/Reese.html
dc.identifierhttps://arxiv.org/abs/astro-ph/0702720
dc.identifierhttp://arxiv.org/abs/astro-ph/0702720
dc.identifierAstron.J.133:2846-2858,2007
dc.identifierdoi:10.1086/516826
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/194208
dc.subjectAstrophysics
dc.titlePhotometric Decomposition of Barred Galaxies
dc.typetext

Files

Collections

arXiv