X-ray cavities in the G50 bright group-centered galaxy NGC 5846

Abstract

We present results based on analysis of the currently available 29.86 ks Chandra data on the Bright Group-Centered Galaxy (BGG) NGC 5846 of G50 group. A pair of X-ray cavities have been detected within a radius ≤ 1 kpc along the North-East and South-West directions. The analysis yielded the average cavity energy, ages and mechanical power equal to ~ 3:1 x 1048 erg, 0:61 x 107 yr and, 3:78 x 1041 erg s-1, respectively. The luminosity of X-ray emitting gas within the cooling radius (20 kpc) was found to be 2.4 x 1041 erg s􀀀1, in agreement with the mechanical cavity power. The ratio of radio luminosity to mechanical cavity power is found to be 10􀀀4. The Bondi accretion rate of the central supermassive black hole (SMBH) is ~ 5:95 x 10-5 M⊙ yr-1 and the black-hole mass derived using the Bondi-accretion rate was found to be ~ 3:74 x 108 M⊙.

Keywords

• galaxies: active
• galaxies: general
• galaxies: clusters: individual: ngc 5846
• inter-galactic medium