N_{H}-N_{HI} correlation in gigahertz-peaked-spectrum galaxies

doi:10.1002/asna.201512284

N_{H}-N_{HI} correlation in gigahertz-peaked-spectrum ...

Bibliographic description

punktacja MNiSW [2016 A]: 20

title:	N_{H}-N_{HI} correlation in gigahertz-peaked-spectrum galaxies
author:	Ostorero L., Morganti R., Diaferio A., Siemiginowska A., Stawarz Łukasz , Moderski R., Labiano A.
Journal title:	Astronomische Nachrichten = Astronomical Notes
volume:	337
issue:	1-2
date of publication:	2016
pages:	148-153
ISSN:	0004-6337
eISSN:	1521-3994
DOI:	10.1002/asna.201512284
language:	English
Journal language:	English
abstract in english:	With the Westerbork Synthesis Radio Telescope, we performed H I observations of a sample of known X-ray emitting Gigahertz-peaked-spectrum galaxies with compact-symmetric-object morphology (GPS/CSOs) that lacked an H I absorption detection. We combined radio and X-ray data of the full sample of X-ray emitting GPS/CSOs and found a significant, positive correlation between the column densities of the total and neutral hydrogen (N_{H} and N_{HI}, respectively). Using a Bayesian approach, we simultaneously quantified the parameters of the N_{H}-N_{HI} relation and the intrinsic spread of the data set. For a specific subset of our sample, we found N_{H} \infty N_{HI^{b}}, with b = 0.93^{+0.49}_{-0.33}, and \omega _{int}(N_{H}) = 1.27^{+1.30} _{-0.40}. The N_{H}-N_{HI} correlation suggests a connection between the physical properties of the radio and X-ray absorbing gas.
keywords in english:	galaxies: active − galaxies: ISM − ISM: clouds − radio lines: galaxies − X-rays: galaxies
affiliation:	Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut – Obserwatorium Astronomiczne
type:	journal article
subtype:	academic paper