The Canarias Einstein ring: a newly discovered optical Einstein ring

Bibcode
2016MNRAS.461L..67B
DOI
10.1093/mnrasl/slw097
Bettinelli, M.; Simioni, M.; Aparicio, A.; Hidalgo, S. L.; Cassisi, S.; Walker, A. R.; Piotto, G.; Valdes, F.
Bibliographical reference

Monthly Notices of the Royal Astronomical Society: Letters, Volume 461, Issue 1, p.L67-L71

Advertised on:
9
2016
Number of authors
8
IAC number of authors
5
Citations
12
Refereed citations
11
Description
We report the discovery of an optical Einstein ring in the Sculptor constellation, IAC J010127-334319, in the vicinity of the Sculptor dwarf spheroidal galaxy. It is an almost complete ring (˜300°) with a diameter of ˜4.5 arcsec. The discovery was made serendipitously from inspecting Dark Energy Camera (DECam) archive imaging data. Confirmation of the object nature has been obtained by deriving spectroscopic redshifts for both components, lens and source, from observations at the 10.4 m Gran Telescopio CANARIAS (GTC) with the spectrograph OSIRIS. The lens, a massive early-type galaxy, has a redshift of z = 0.581, while the source is a starburst galaxy with redshift of z = 1.165. The total enclosed mass that produces the lensing effect has been estimated to be Mtot = (1.86 ± 0.23) × 1012 M⊙.
Type
Refereed
Gravitational lensing
Galaxies

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