We use a restricted sample of elliptical galaxies, whose kinematical parameters inside the semi-major axis were calculated correcting for the effect of the integration of the light along the line of sight, in order to analyze a possible relationship between the mass of a supermassive black hole (SMBH) and the kinetic energy of random motions in the host galaxy. We find MBH ∝ (MG σ2)α with 0.87 ≤ α ≤ 1 depending on the different fitting methods and samples used. This result could be interpreted as a new fundamental relationship or as a new way to explain the old MBH - σ law. In fact, the relations of the velocity dispersion both with the mass of the SMBH (MBH ∝ σ4.12) and with the mass of the host galaxy (MG ∝ σ2.16) induce us to infer an almost direct proportionality: MBH ∝ MGσ2. A similar relationship is found for the total kinetic energy involving the rotation velocity too.
IS THERE A RELATIONSHIP BETWEEN THE MASS OF A SMBH AND THE KINETIC ENERGY OF ITS HOST ELLIPTICAL GALAXY?
FEOLI A;
2005-01-01
Abstract
We use a restricted sample of elliptical galaxies, whose kinematical parameters inside the semi-major axis were calculated correcting for the effect of the integration of the light along the line of sight, in order to analyze a possible relationship between the mass of a supermassive black hole (SMBH) and the kinetic energy of random motions in the host galaxy. We find MBH ∝ (MG σ2)α with 0.87 ≤ α ≤ 1 depending on the different fitting methods and samples used. This result could be interpreted as a new fundamental relationship or as a new way to explain the old MBH - σ law. In fact, the relations of the velocity dispersion both with the mass of the SMBH (MBH ∝ σ4.12) and with the mass of the host galaxy (MG ∝ σ2.16) induce us to infer an almost direct proportionality: MBH ∝ MGσ2. A similar relationship is found for the total kinetic energy involving the rotation velocity too.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
