The Time Delays of Gravitational Lens HE0435-1223: An Early-Type Galaxy With a Rising Rotation Curve

Simple item page
dc.creatorKochanek, C. S.
dc.creatorMorgan, N. D.
dc.creatorFalco, E. E.
dc.creatorMcLeod, B. A.
dc.creatorWinn, J. N.
dc.creatorDembicky, J.
dc.creatorKetzeback, B.
dc.date2005-08-02
dc.date.accessioned2026-07-07T10:43:17Z
dc.date.available2026-07-07T10:43:17Z
dc.descriptionWe present Hubble Space Telescope images and 2 years of optical photometry of the quadruple quasar HE0435-1223. The time delays between the intrinsic quasar variations are 14.4+/-0.8 (A-D), 8.0+/-0.8 (A-B) and 2.1+/-0.8 (A-C) days. We also observed non-intrinsic variations of ~0.1 mag/yr that we attribute to microlensing. Instead of the traditional approach of assuming a rotation curve for the lens galaxy and then deriving the Hubble constant (H_0), we assume H_0=(72+/-7) km/s/Mpc and derive constraints on the rotation curve. On the scale over which the lensed images occur (1.2"=5kpc/h=1.5R_e), the lens galaxy must have a rising rotation curve, and it cannot have a constant mass-to-light ratio. These results add to the evidence that the structures of early-type galaxies are heterogeneous.
dc.description36 pages, 10 figures, submitted to ApJ
dc.identifierhttps://arxiv.org/abs/astro-ph/0508070
dc.identifierhttp://arxiv.org/abs/astro-ph/0508070
dc.identifierAstrophys.J.640:47-61,2006
dc.identifierdoi:10.1086/499766
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/182187
dc.subjectAstrophysics
dc.titleThe Time Delays of Gravitational Lens HE0435-1223: An Early-Type Galaxy With a Rising Rotation Curve
dc.typetext

Files

Collections

arXiv