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Date and Time of the Query: 2019-06-26 T08:43:49 PDT
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For refcode 2010MNRAS.406.2805J:
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Copyright by Royal Astronomical Society. 2010MNRAS.406.2805J Global disc models for galaxies NGC 1365, 6946, 7793 and UGC 6446 Jalocha, Joanna; Bratek, Lukasz; Kutschera, Marek; Skindzier, Piotr Abstract. ABSTRACT Spiral galaxies are studied using a simple global disc model as a means for approximate determination of mass profiles. Based on rotation curves and the amount of gas (HI+He), we find global surface mass densities consistent with measurements and compare them with B-band surface brightness profiles. As a result we obtain mass-to-light ratio profiles. We give some arguments for why our approach is reliable and sometimes better than those assuming ad hoc the presence of a massive non-baryonic dark matter halo. Using this model, we study galaxies NGC 7793, 1365, 6946 and UGC 6446. Based on a rotation curve from The HI Nearby Galaxy Survey (THINGS) we also study galaxy NGC 4536 and compare the results with those we published elsewhere for the same galaxy. Key words: galaxies: kinematics and dynamics, galaxies: luminosity function, mass function, galaxies: spiral, galaxies: structure, dark matter
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