Star was hurled across our Milky Way galaxy by new, unseen kind of black hole
Yahoo.com - Tue 10 Sep 19:59 GMT

Keck Observatory data revealed that PG1610+062 is actually a surprisingly young, massive star

  The star may have been hurled by a mid-mass black hole (Getty) A star which was hurled across our galaxy at enormous speed was probably ejected from its birth galaxy by a sort of black hole never before seen in our galaxy.

  Researchers from the Keck telescope believe that the star, PG 1610+062 was hurled across the galaxy by a mid-mass black hole (MMBH).

  Keck Observatory data revealed that PG1610+062 is actually a surprisingly young, massive star that’s ten times more massive, ejected from the Galactic disk almost at the escape velocity from the Milky Way.

  Researchers now believe there is only one likely culprit - a mid-mass black hole.

  The team needed spectral data of the star, but its distance and position in the sky made W. M. Keck Observatory’s Echellette Spectrograph and Imager (ESI) the only tool for the job.

  In the northern hemisphere, only the combination of Keck Observatory and ESI gave us what we needed.

  The collecting area of Keck allowed us to gather enough photons for our object and ESI has exactly the right resolution, which is high enough to resolve all the spectral features,