WebNGC 4258 is a Seyfert galaxy in the constellation Ursa major. It is generally agreed to have at its heart a supermassive black hole some 39 million times more massive than the Sun. … WebWe determine the mass of the black hole at the center of the spiral galaxy NGC 4258 by constructing axisymmetric dynamical models of the galaxy. These models are …
[PDF] How active is NGC 4258? - ResearchGate
Web16 de mar. de 2015 · In this work we present a two-dimensional mapping of the stellar kinematics in the inner 3.0 x 3.0 arcsec = 100 x 100 pc of NGC 4258 using adaptative-optics observations obtained with the... Web7 de ago. de 2024 · Spiral galaxy NGC 4258 puts on galactic light show with a giant black hole, shock waves and vast reservoirs of gas. Spiral galaxy NGC 4258 puts on galactic ... After allowing for the large boost in infrared emission caused by the shocks, the researchers found that the gas mass is ten times smaller than had been previously estimated. clark science fiction writer
Spectroscopy of NGC 4258 Globular Cluster Candidates: …
Web1 de mar. de 2024 · A rotation-curve based on emission-line measures has been obtained for the Sb galaxy NGC 4258. This rotation-curve has been analyzed by the same method … WebWe present an analysis of polarimetric observations at 22 GHz of the water vapor masers in NGC 4258 obtained with the VLA and the GBT. We do not detect any circular … Web1 de mar. de 2024 · A rotation-curve based on emission-line measures has been obtained for the Sb galaxy NGC 4258. This rotation-curve has been analyzed by the same method that we have used throughout this series of papers, and the mass of the galaxy within a radius of about 7 kpc from the center is 8.2×10 10 M ☉, while the mass-to-light ratio … download cs2 photoshop free