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- Title
N<sub>H</sub>- N<sub>HI</sub> correlation in gigahertz-peaked-spectrum galaxies.
- Authors
Ostorero, L.; Morganti, R.; Diaferio, A.; Siemiginowska, A.; Stawarz, Ł.; Moderski, R.; Labiano, A.
- Abstract
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 ( NH and NHI, respectively). Using a Bayesian approach, we simultaneously quantified the parameters of the NH- NHI relation and the intrinsic spread of the data set. For a specific subset of our sample, we found NH ∝ N, with b = 0.93+0.49-0.33, and ωint( NH) = 1.27+1.30-0.40. The NH- NHI correlation suggests a connection between the physical properties of the radio and X-ray absorbing gas. (© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
- Subjects
RADIO telescopes; H I regions (Astrophysics); RADIO galaxies; HYDROGEN; MORPHOLOGY; INTERSTELLAR medium; BAYESIAN analysis
- Publication
Astronomische Nachrichten, 2016, Vol 337, Issue 1/2, p148
- ISSN
0004-6337
- Publication type
Article
- DOI
10.1002/asna.201512284