Hubble Space Telescope Observations of the Gravitational Lens System B1422+231

Details Hubble Space Telescope Observations of the Gravitational Lens System B1422+231 Hubble Space Telescope Observations of the Gravitational Lens System B1422+231

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...462l..53i&link_type=abstract

Astrophysical Journal Letters v.462, p.L53

Astronomy and Astrophysics

Astronomy

48

Cosmology: Gravitational Lensing

Scientific paper

Hubble Space Telescope observations of the gravitational lens system B1422+231 are presented. The spectra of the four components are virtually identical, although there are differences among the Ly alpha emission-line equivalent widths that might be due to microlensing. There are also significant differences between the component flux density ratios measured at radio and optical wavelengths. High-resolution imaging reveals the lens close to the faintest quasar image. The lens has photometric properties consistent with an elliptical galaxy at z ~ 0.4. The addition of new constraints to simple lensing models affirms the B1422+231 system as a suitable tool for an eventual direct measure of the Hubble constant.

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