4 ms·
Why wouldn't it be a halo around the lensing galaxy instead of four distinct points?
by nvusuvu 8y ago
Why wouldn't it be a halo around the lensing galaxy instead of four distinct points?
- colanderman 8y ago"While gravitationally lensed light sources are often shaped into an Einstein ring, due to the elongated shape of the lensing galaxy and the quasar being off-centre, the images form a peculiar cross-shape instead." [1] [1] https://en.wikipedia.org/wiki/Einstein_Cross https://en.wikipedia.org/wiki/Einstein_Cross
- SiempreViernes 8y agoNot all lenses are good lenses, especially not the ones nature makes by accident. It also matters where the background source is relative the centre to the crappy lens, see third picture here for how the same basic shape can make different images of the same source: http://inspirehep.net/record/850223/plots# http://inspirehep.net/record/850223/plots#
- deleted 8y ago[deleted]