Other
Scientific paper
Sep 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....104..959r&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 104, no. 3, Sept. 1992, p. 959-967. Research supported by Hubble Fellowship and Spac
Other
76
Gravitational Lenses, Hubble Space Telescope, Quasars, Wide Angle Lenses, Astronomical Models, Dynamic Characteristics, Elliptical Galaxies, Interstellar Extinction, Mass To Light Ratios
Scientific paper
Images of the gravitational lens system 2237 + 0305, taken with the HST Wide Field Camera, are analyzed. Positions for the four quasar images, accurate to +/-0.015 arcsec, and relative magnitudes in U and R, accurate to +/-0.06 and 0.04 mag, respectively, are determined. The upper limits on the observed brightness of the fifth image are found to be less than or approximately equal to 7 percent of the brightest quasar image. The mass of the lens inside 0.9 arcsec is found to be 1.08 +/-0.02 x 10 exp 10 solar masses/h100 corresponding to a mass-to-light ratio in B of 12.3h100. This solar mass/solar luminosity estimate agrees with values obtained from stellar dynamics for other elliptical galaxies. A comparison of predictions from this mass model with the measured central velocity dispersion yields a distance-independent agreement to within 10 percent, assuming isotropic velocity dispersions.
Bahcall John N.
Rix Hans-Walter
Schneider Donald P.
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