Bibcode
DOI
Muñoz, J. A.; Kochanek, C. S.; Keeton, C. R.
Bibliographical reference
The Astrophysical Journal, Volume 558, Issue 2, pp. 657-665.
Advertised on:
9
2001
Journal
Citations
88
Refereed citations
74
Description
Recent observations of galaxy luminosity profiles and dark matter
simulations find luminosity and mass distributions characterized by
central cusps rather than finite core radii. We introduce and implement
a set of cusped ellipsoidal lens models that include limits similar to
the Jaffe, Hernquist, η and NFW models and apply them to the
gravitational lenses APM 08279+5255 and B1933+503. A successful model of
APM 08279+5255 with its central, odd image requires a very shallow cusp,
γ<~0.4, where ρ~r-γ as r-->0, which is
similar to a core rather than the favored 1<~γ<~2 cusps.
B1933+503, by contrast, is well modeled with a steep density cusp,
1.6<~γ<~2.0.