Some Features of the X-Ray and Radio Emission from OH Megamaser Galaxies

Abstract

The properties of OH megamaser galaxies in the x-ray and radio ranges are discussed. Based on a sample of OH megamaser galaxies it is shown that the x-ray emission and the width of the OH radio line are closely related. The line width is also related to the radio emission from megamasers, but it depends only weakly on the infrared emission and this relationship is statistically less significant. The OH line width and the radio and x-ray emissions depend on the central mass of megamasers. There is a weak correlation between the radio and x-ray emissions owing to multiple scattering of synchrotron photons and bursts from the galactic nucleus. These results indicate that an active nucleus can be dominant in OH megamaser galaxies.

Galaxies Correlating With Ultra-High Energy Cosmic Rays

“…We can determine the bolometric luminosities of 23 out of the remaining 24. In 18 cases we use the measured 2-10 keV X-ray luminosities (Ho et al 2001;Terashima et al 2002;Satyapal et al 2005;González-Martín et al 2006;Panessa et al 2006;Horst et al 2008;Kandalyan 2005), and for the five for which X-ray luminosities are not available we use the measured [OIII] flux (Shields et al 2007;Ho et al 1997a). There is some evidence that the [OIII] to bolometric luminosity conversion depends on luminosity or Eddington ratio (e.g., Netzer et al (2006)).…”

“…References 2008), (h) Kewley et al (2001), (i) Kandalyan (2005) C. NOTES ON THE AGNS FROM THE NASA EXTRAGALACTIC DATABASE Moskalenko et al (2008) lists eight additional AGNs within 3.2 • of the Auger CRs with z ≤ 0.018, based on the classifications in the NASA Extragalactic Database. Some of them were determined to be AGNs after the publications of the VCV 12th Edition.…”