Abstract
view Abstract Citations (20) References (10) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Infrared K-band observations of the gravitational lens 2016+112. Langston, Glen ; Fischer, Jacqueline ; Aspin, Colin Abstract IR observations of the gravitational lens 2016 + 112 at the K band are presented. The IR image is dominated by the extended emission of the radio-quiet foreground galaxy, which acts as the gravitational lens. IR flux is seen at the location of all three radio-loud components of the system. Gaussian fits to the data yield K-band fluxes for all four components. To within the errors of the fit, the i-K colors of the ratio-loud images are similar, while the color of the foreground galaxy is closer to that expected for an elliptical galaxy with z of about 1. The relative brightnesses of the 2016 + 112 components at K band are significantly different than the optical g-band brightnesses. The K-band observation suggest that the central galaxy makes the dominant contribution to the mass acting as the gravitational lens. A model of the gravitational lens as a single massive elliptical galaxy is presented. This model suggests that all radio loud components of 2016 + 112 can be explained as images of the background quasar and are not due to a second foreground galaxy, as indicated by earlier work. Radio wavelength observations at the X band are included to show the compact radio structure of 2016 + 112, which also supports the single-galaxy lens model. Publication: The Astronomical Journal Pub Date: October 1991 DOI: 10.1086/115951 Bibcode: 1991AJ....102.1253L Keywords: Gravitational Lenses; Infrared Sources (Astronomy); Radio Galaxies; Astronomical Models; Elliptical Galaxies; Quasars; Astrophysics full text sources ADS | data products SIMBAD (7) NED (3)
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