The third image, the redshift of the lens, and new components of the gravitational lens 2016 + 112

Details The third image, the redshift of the lens, and new components of the gravitational lens 2016 + 112 The third image, the redshift of the lens, and new components of the gravitational lens 2016 + 112

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....91..991s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 91, May 1986, p. 991-997.

Astronomy and Astrophysics

Astronomy

64

Gravitational Lenses, Image Analysis, Red Shift, Spectrum Analysis, Absorption Spectra, Astronomical Spectroscopy, Elliptical Galaxies, Emission Spectra, Luminosity, Lyman Alpha Radiation, Radio Sources (Astronomy)

Scientific paper

A third lensed image has been found in the gravitational lens system 2016+112. It is located near 2016+112 C, the strongest radio source in the system, and was detected by observations with the Palomar 5 m telescope in a narrowband filter centered on the Lyman α emission of the two previously known images. Resolved, low-surface-brightness companions of the two brighter images (A and B) were also discovered in the narrowband image. Simple model-independent calculations indicate M ≥ 1.2x1012h-1M_sun; and M/LB ≥ 21 h(M_sun;/L_sun;) for the lensing object. Furthermore, this mass must be concentrated within a circle of radius 8.3 h-1kpc, or the total lens mass must greatly exceed this lower bound.

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