Abstract
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.
Original language | English (US) |
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Pages (from-to) | 991-997 |
Journal | Astronomical Journal |
Volume | 91 |
DOIs | |
State | Published - May 1 1986 |