Black Hole Ejected from the Nucleus of Galaxy NGC 5236

DOTTORI, H..; DÍAZ, R.; ALBACETE COLOMBO, J. F.; MAST, D

INTERNATIONAL JOURNAL OF MODERN PHYSICS A

WORLD SCIENTIFIC PUBL CO PTE LTD

Lugar: Londres; Año: 2010 p. 1259 - 1264

0217-751X

The Fanaroff-Riley II-type radiosource J 133658.3-295105, which is also an X-ray source, appears to be projected onto the disc of the barred-spiral galaxy NGC 5236 (M 83) at about 1.2 kiloparsecs from the galaxy´s optical nucleus. J 133658.3-295105, its radio-lobes, and two other radiosources, neither of which are supernovae remnants or HII regions, are aligned with the optical nucleus of NGC 5236. Due to this peculiar on-the-sky projection, we studied J 133658.3-295105 using GEMINI+GMOS optical spectroscopy and also reanalyzed Chandra spectroscopy which was carried out in 2000. We marginally detected the Halpha emission line receding at 130 km/sec with respect to the optical nucleus. We also demostrate that J 133658.3-295105 presents the Fe-Kalpha emission line at a redshift z = 0.018+-0.01. Both, Halpha and Fe-Kalpha present redshifts that are compatible with the distance of NGC 5236. That findings reinforce the scenario of a local object for J 133658.3-295105, which could have been ejected from the nucleus of NGC 5236.