Talk:Quasar/Archive for 2015

New report

Newly reported, albeit by letter, the most massive quasar yet:
Xue-Bing Wu, Feige Wang, Xiaohui Fan, Weimin Yi, Wenwen Zuo, Fuyan Bian, Linhua Jiang, Ian D. McGreer, Ran Wang, Jinyi Yang, Qian Yang, David Thompson, Yuri Beletsky. An ultraluminous quasar with a twelve-billion-solar-mass black hole at redshift 6.30 Nature 518 pp. 512–515 (26 February 2015) doi:10.1038/nature14241 LeadSongDog come howl! 20:08, 26 February 2015 (UTC)

Multiple quasars

I found the section on multiple quasars a bit difficult to follow, but I'm not quite sure how it should be improved.

The problem is that it doesn't make the distinction between a gravitationally lensed system, a gravitionally bound system and just an aligned system clear. It may be better to start the section explaining that all these three things can occur, but that some or less common than others. The first paragraph makes it sound like all multiple quasars are lensed, but it is not quite clear that this isn't the case when I read the second paragraph, although it says it is not the case for this system. IIRC, the odd image will be demagnified in gravitional lensing, so we will not see it. — Preceding unsigned comment added by Kjetil (talk • contribs) 08:56, 21 April 2015 (UTC)