SIMBAD references

2006ApJ...640...47K - Astrophys. J., 640, 47-61 (2006/March-3)

The time delays of gravitational lens HE 0435-1223: an early-type galaxy with a rising rotation curve.

KOCHANEK C.S., MORGAN N.D., FALCO E.E., McLEOD B.A., WINN J.N., DEMBICKY J. and KETZEBACK B.

Abstract (from CDS):

We present Hubble Space Telescope images and 2 years of optical photometry of the quadruple quasar HE 0435-1223. The time delays between the intrinsic quasar variations are ΔtAD=-14.37+0.75–0.85, ΔtAB=-8.00+0.73–0.82, and ΔtAC=-2.10+0.78–0.71days. We also observed nonintrinsic 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 (H0), we assume H0=(72±7) km/s/Mpc and derive constraints on the rotation curve. On the scale over which the lensed images occur (1".2=5 h–1 kpc≃1.5Re), 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.

Abstract Copyright: ∼

Journal keyword(s): Cosmology: Cosmological Parameters - Cosmology: Dark Matter - Galaxies: Kinematics and Dynamics - Cosmology: Gravitational Lensing - quasars: individual (HE 0435-1223)

Nomenclature: Table 3: [KMF2006] SN (Nos S1-S5). Fig.6: [MKP2005] GNN (No. G25) added.

CDS comments: In introd. : Q0957+564 is a misprint for QSO 0957+561. Table 2: Objects are [WSB2002] 0435-1223 A (Nos A-D, G) and object H = QSO HE 0435-1223.

Simbad objects: 26

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