Cusped mass models of gravitational lenses

J. A. Muñoz, C. S. Kochanek, Charles Keeton

Research output: Contribution to journalArticle

65 Citations (Scopus)

Abstract

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 p ∝ r 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.

Original languageEnglish (US)
Pages (from-to)657-665
Number of pages9
JournalAstrophysical Journal
Volume558
Issue number2 PART 1
DOIs
StatePublished - Sep 10 2001

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gravitational lenses
cusps
luminosity
mass distribution
dark matter
lenses
galaxies
radii
simulation
profiles

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Dark matter
  • Galaxies: halos
  • Gravitational lensing

Cite this

Muñoz, J. A. ; Kochanek, C. S. ; Keeton, Charles. / Cusped mass models of gravitational lenses. In: Astrophysical Journal. 2001 ; Vol. 558, No. 2 PART 1. pp. 657-665.
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Muñoz, JA, Kochanek, CS & Keeton, C 2001, 'Cusped mass models of gravitational lenses', Astrophysical Journal, vol. 558, no. 2 PART 1, pp. 657-665. https://doi.org/10.1086/322314

Cusped mass models of gravitational lenses. / Muñoz, J. A.; Kochanek, C. S.; Keeton, Charles.

In: Astrophysical Journal, Vol. 558, No. 2 PART 1, 10.09.2001, p. 657-665.

Research output: Contribution to journalArticle

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