Supermassive black hole at the heart of the Milky Way is approaching the cosmic speed limit, dragging space-time along with it

[admin]

Supermassive black hole Sagittarius A* is spinning nearly as fast as it can, dragging the very fabric of space-time with it and shaping the heart of the Milky Way.

Supermassive black hole at the heart of the Milky Way is approaching the cosmic speed limit, dragging space-time along with it : Read more

 

[Steamdude]

As confounding as the physics of black holes is, it seems to me that you should still be able to define its rotation as a function of number of revolutions per interval of time, which would put it into a much more understandable frame of reference than a number between 0 and 1. Has the speed of Sag A been defined in such terms, and if so, it was an epic fail for the author not to mention that number in this article.

 

[Debed]

As confounding as the physics of black holes is, it seems to me that you should still be able to define its rotation as a function of number of revolutions per interval of time, which would put it into a much more understandable frame of reference than a number between 0 and 1. Has the speed of Sag A been defined in such terms, and if so, it was an epic fail for the author not to mention that number in this article.

As far as I am aware, there has not been any luck in seeing a wobble in Sag A, so there is no way of calculating the spin.

 

[Steamdude]

As far as I am aware, there has not been any luck in seeing a wobble in Sag A, so there is no way of calculating the spin.

Not sure why you'd need a wobble. Couldn't it be closely inferred by the rotation of the accretion disk?