Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...199.2507k&link_type=abstract
American Astronomical Society, 199th AAS Meeting, #25.07; Bulletin of the American Astronomical Society, Vol. 33, p.1349
Astronomy and Astrophysics
Astronomy
1
Scientific paper
We present X-ray point source luminosity functions of 3 starburst galaxies (the Antennae, M82, and NGC 253) and 4 non-starburst spiral galaxies (NGC 3184, NGC 1291, M83, and IC 5332). We find that the luminosity functions of the starbursts are flatter than those of the spiral galaxies; the starbursts have relatively more sources at high luminosities. This trend continues to early-type galaxies which have steeper luminosity functions than spirals. We show that the luminosity function slope is correlated with 60 μ m luminosity, a measure of star formation. We suggest that the difference in luminosity functions is related to the age of the X-ray binary populations and present a simple model which highlights how the shape of the luminosity distribution is effected by the age of the underlying X-ray binary population. This work was supported by NASA contract NAS8-39073 (CXC).
Kaaret Philip E.
Kilgard Roy E.
Krauss Miriam I.
McDowell Jonathan C.
Prestwich Andrea H.
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