Ejection of Matter and Energy from NGC 4258

Open Access
Publisher Website
Google Scholar
Abstract
It has been claimed by Miyoshi and Greenhill that the megamaser observations of the nucleus of NGC 4258 show that a massive black hole is present in its center. We show that the evidence of ejection of gas, radio plasma, and X-ray-emitting QSOs from this nucleus proves that the ejection is coming from the center in a curving flow within a cone with angle ~40°, centered at P.A. 100°. This is close to the direction in which the velocities from the megamaser have been measured, so that the evidence taken as a whole suggests that the masering gas also is being ejected in the same direction at velocities ±900 km s-1 rather than rotating about a massive black hole. Thus the gas does not provide evidence for a black hole in the center.
All Related Versions

This publication has 13 references indexed in Scilit: