Hostname: page-component-78c5997874-ndw9j Total loading time: 0 Render date: 2024-11-12T21:51:16.471Z Has data issue: false hasContentIssue false
  • English
  • Français

Water maser emission in hard X-ray selected AGN

Published online by Cambridge University Press:  16 July 2018

Francesca Panessa ,
Paola Castangia ,
Andrea Tarchi ,
Loredana Bassani ,
Angela Malizia ,
Angela Bazzano  and
Pietro Ubertini
Francesca Panessa
Affiliation:
INAF - Istituto di Astrofisica e Planetologia Spaziali di Roma (IAPS), Via del Fosso del Cavaliere 100, 00133 Roma, Italy
Paola Castangia
Affiliation:
INAF-Osservatorio Astronomico di Cagliari (OAC-INAF), Via della Scienza 5,09047 Selargius (CA), Italy
Andrea Tarchi
Affiliation:
INAF-Osservatorio Astronomico di Cagliari (OAC-INAF), Via della Scienza 5,09047 Selargius (CA), Italy
Loredana Bassani
Affiliation:
Istituto di Astrofisica Spaziale e Fisica Cosmica (IASF-INAF), Via P. Gobetti 101, 40129 Bologna, Italy
Angela Malizia
Affiliation:
Istituto di Astrofisica Spaziale e Fisica Cosmica (IASF-INAF), Via P. Gobetti 101, 40129 Bologna, Italy
Angela Bazzano
Affiliation:
INAF - Istituto di Astrofisica e Planetologia Spaziali di Roma (IAPS), Via del Fosso del Cavaliere 100, 00133 Roma, Italy
Pietro Ubertini
Affiliation:
INAF - Istituto di Astrofisica e Planetologia Spaziali di Roma (IAPS), Via del Fosso del Cavaliere 100, 00133 Roma, Italy
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Water megamaser emission is powerful in tracing the inner region of active nuclei, mapping accretion disks and providing important clues on their absorption properties. From the X-ray spectra of AGN it is possible to estimate the intrinsic power of the central engine and the obscuring column density. The synergy between X-ray and water maser studies allows us to tackle the AGN inner physics from different perspectives. For a complete sample of AGN selected in the 20-40 keV energy range, we have investigated the presence of water maser emission and its connection to the X-ray emission, absorption and accretion rate. The hard X-ray selection of the sample results in a water maser detection rate much higher than those obtained from optically-selected samples.

Keywords

galaxies: activeradio lines: galaxiesX-rays: galaxies
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S336: Astrophysical Masers: Unlocking the Mysteries of the Universe , September 2017 , pp. 96 - 98
Copyright
Copyright © International Astronomical Union 2018 

References

Baumgartner, W. H., Tueller, J., Markwardt, C. B., et al. 2013, ApJS, 207, 19CrossRefGoogle Scholar
Bird, A. J., Bazzano, A., Malizia, A., et al. 2016, ApJS, 223, 15Google Scholar
Bird, A. J., Bazzano, A., Bassani, L., et al. 2010, ApJS, 186, 1Google Scholar
Braatz, J. A., Reid, M. J., Humphreys, E. M. L., et al. 2010, ApJ, 718, 657Google Scholar
Braatz, J., Kondratko, P., Greenhill, L., et al. 2007, Astrophysical Masers and their Environments, 242, 402Google Scholar
Castangia, P., Panessa, F., Henkel, C., Kadler, M., & Tarchi, A., 2013, MNRAS, 436, 3388CrossRefGoogle Scholar
Greenhill, L. J., Tilak, A., & Madejski, G. 2008, ApJL, 686, L13Google Scholar
Greenhill, L. J., Booth, R. S., Ellingsen, S. P., et al. 2003, ApJ, 590, 162Google Scholar
Kondratko, P. T., Greenhill, L. J., & Moran, J. M. 2006, ApJ, 652, 136Google Scholar
Malizia, A., Landi, R., Molina, M., et al. 2016, MNRAS, 460, 19CrossRefGoogle Scholar
Malizia, A., Bassani, L., Bazzano, A., et al. 2012, MNRAS, 426, 1750CrossRefGoogle Scholar
Malizia, A., Stephen, J. B., Bassani, L., et al. 2009, MNRAS, 399, 944Google Scholar
Panessa, F. & Giroletti, M., 2013, MNRAS, 432, 1138Google Scholar
Ramos Almeida, C. & Ricci, C., 2017, Nature Astronomy, 1, 679Google Scholar
Reid, M. J., Braatz, J. A., Condon, J. J., et al. 2009, ApJ, 695, 287Google Scholar