A new quadruple-image gravitational lens in an edge-on disk galaxy at z=0.0956
John R. Lucey (CEA, Durham), Russell J. Smith (CEA, Durham), Paul L., Schechter (MIT Kavli Institute), Amanda S. Bosh (MIT EAPS), Stephen E. Levine, (Lowell Observatory)
TL;DR
This paper reports the discovery of a rare quadruple-image gravitational lens system behind an edge-on disk galaxy at z=0.0956, providing insights into galaxy mass distribution and lensing phenomena.
Contribution
It presents the first detection of a quadruple-image gravitational lens in an edge-on disk galaxy, with preliminary modeling of its lensing properties.
Findings
Einstein radius of 1.44 arcsec
Mass-to-light ratio of 0.5 in K-band
Lensed images observed through dust in the galaxy disk
Abstract
We report the serendipitous discovery of a quadruply-lensed source behind the z=0.095 edge-on disk galaxy 2MASXJ13170000-1405187, based on public imaging survey data from Pan-STARRS PS1 and the VISTA Hemisphere Survey. Follow-up imaging from Magellan/LDSS3 shows that the background source is spatially extended (i.e. not a QSO), and that two of the lensed images are observed through a prominent dust ring in the disk of the lens galaxy. We summarise results of preliminary modelling, which indicates an Einstein radius of 1.44 arcsec, and a K-band mass-to-light ratio of 0.5, relative to the solar value.
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Taxonomy
TopicsGalaxies: Formation, Evolution, Phenomena · Astrophysical Phenomena and Observations · Stellar, planetary, and galactic studies