Hubble Space TelescopeObservations of the Gravitationally Lensed Cloverleaf Broad Absorption Line QSO H1413+1143: Modeling the Lens
Open Access
- 1 April 1999
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 514 (2), 587-597
- https://doi.org/10.1086/306962
Abstract
We investigate gravitational lens models for the quadruply lensed Cloverleaf broad absorption line QSO H1413+1143 based on the Hubble Space Telescope (HST) WFPC/WFPC2 astrometric and photometric data of the system by Turnshek et al. and the HST NICMOS-2 data by Falco et al. The accurate image positions and the dust-extinction-corrected relative amplifications, along with a possible detection of the lensing galaxy in the infrared, permit more accurate lens models than were previously possible. While more recent models are qualitatively consistent with the HST data, none of the previous models considered the dust-extinction-corrected relative amplifications of the image components. We use the power-law elliptical mass model to fit the HST data. We find that a single elliptical galaxy perturbed by an external shear can fit the image positions within the observational uncertainties; however, the predicted relative magnifications are only roughly consistent with the observational relative amplifications. We find that a primary galaxy combined with a secondary galaxy in the vicinity of the Cloverleaf or a cluster centered (south-) west of the Cloverleaf can fit both the image positions and relative amplifications within the observational uncertainties. We discuss future observations that could be used to test and/or further constrain lens models of the Cloverleaf.Keywords
This publication has 23 references indexed in Scilit:
- Gravitational Lensing by Power‐Law Mass Distributions: A Fast and Exact Series ApproachThe Astrophysical Journal, 1998
- Determining the Hubble constant from the gravitational lens PG 1115+080The Astrophysical Journal, 1997
- Shear and Ellipticity in Gravitational LensesThe Astrophysical Journal, 1997
- The Mass Distribution of the Cluster 0957+561 From Gravitational LensingThe Astronomical Journal, 1997
- 1608+656: A Gravitationally Lensed PostStarburst Radio GalaxyThe Astrophysical Journal, 1996
- X-Ray Constraints on the Intrinsic Shapes and Baryon Fractions of Five Abell ClustersThe Astrophysical Journal, 1996
- The shapes of galaxy clustersMonthly Notices of the Royal Astronomical Society, 1995
- The use of gravitational microlensing to scan the structure of BAL QSOsAstrophysics and Space Science, 1994
- New observations and gravitational lens models of the Cloverleaf quasar H1413 + 117The Astrophysical Journal, 1990
- Nine new quasi-stellar objects with broad absorption linesThe Astrophysical Journal, 1984