A star trail may just be a galaxy viewed on its edge, not a stellar wake left by a runaway supermassive black hole.
A trail of starlight thought to possibly indicate a runaway supermassive black hole may be something much more mundane: a spiral galaxy seen edge on, a new study finds.
But other researchers have been skeptical of this interpretation, with some suggesting that the scenario is too complex to explain the linear feature. In the new study, “we decided to explore what we thought was the most simple explanation,” says astronomer Ignacio Trujillo of the Instituto de Astrofísica de Canarias in Tenerife, Spain.
So he and his colleagues compared characteristics of the linear feature with those of a well-studied spiral galaxy called IC 5249, which astronomers know we see edge on from Earth. The team looked at the objects’ masses, surface brightnesses and general motions of stars. Theand was also submitted April 24 at arXiv.org.
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