The number, luminosity and mass density of spiral galaxies as a function of surface brightness | Zendy

Stacy McGaugh | Zendy

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The number, luminosity and mass density of spiral galaxies as a function of surface brightness

Author(s) -

Stacy McGaugh

Publication year - 1996

Publication title -

monthly notices of the royal astronomical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.058

H-Index - 383

eISSN - 1365-8711

pISSN - 0035-8711

DOI - 10.1093/mnras/280.2.337

Subject(s) - physics , surface brightness , astrophysics , surface brightness fluctuation , luminosity function , luminosity , galaxy , brightness , spiral galaxy , fundamental plane (elliptical galaxies) , astronomy , elliptical galaxy , disc galaxy

I give analytic expressions for the relative number, luminosity, and massdensity of disc galaxies as a function of surface brightness. These surfacebrightness distributions are asymmetric, with long tails to lower surfacebrightnesses. This asymmetry induces systematic errors in most determinationsof the galaxy luminosity function. Galaxies of low surface brightness exist inlarge numbers, but the additional contribution to the integrated luminositydensity is modest, probably 10 -- 30%.

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