Hostname: page-component-cd9895bd7-gbm5v Total loading time: 0 Render date: 2024-12-25T15:58:12.417Z Has data issue: false hasContentIssue false
  • English
  • Français

AGN and Megamasers

Published online by Cambridge University Press:  24 July 2012

Andrea Tarchi
Andrea Tarchi*
Affiliation:
INAF - Osservatorio Astronomico di Cagliari, Capoterra (CA), Italy email: [email protected]
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.

Luminous extragalactic masers are traditionally referred to as the ‘megamasers’. Those produced by water molecules are associated with accretion disks, radio jets, or outflows in the nuclear regions of active galactic nuclei (AGN). The majority of OH maser sources are instead driven by intense star formation in ultra-luminous infrared galaxies, although in a few cases the OH maser emission traces rotating (toroidal or disk) structures around the nuclear engines of AGN. Thus, detailed maser studies provide a fundamental contribution to our knowledge of the main nuclear components of AGN, constitute unique tools to measure geometric distances of host galaxies, and have a great impact on probing the, so far, paradigmatic Unified Model of AGN.

Keywords

MasersGalaxies: activeGalaxies: nucleiRadio lines: galaxies
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S287: Cosmic Masers - from OH to H0 , January 2012 , pp. 323 - 332
Copyright
Copyright © International Astronomical Union 2012

References

Antonucci, R. 1993, ARAA, 31, 473CrossRefGoogle Scholar
Baan, W. A. 1985, Nature, 315, 26CrossRefGoogle Scholar
Baan, W. A. 1989, ApJ, 338, 804CrossRefGoogle Scholar
Barvainis, R. & Antonucci, R. 2005, ApJ, 628, L89CrossRefGoogle Scholar
Bennert, N., Barvainis, R., Henkel, C., & Antonucci, R. 2009, ApJ, 695, 276CrossRefGoogle Scholar
Braatz, J. A., Wilson, A. S., & Henkel, C. 1994, ApJ, 437, L99CrossRefGoogle Scholar
Castangia, P., Tilak, A., Kadler, M., Henkel, C., Greenhill, L., & Tueller, J. 2010, X-ray Astronomy 2009 Proc. AIPC, Vol. 1248, p. 347Google Scholar
Castangia, P., Impellizzeri, C. M. V., McKean, J. P., Henkel, C., Brunthaler, A., Roy, A. L., Wucknitz, O., Ott, J., & Momjian, E. 2011 A&A, 529, 150Google Scholar
Cernicharo, J., Pardo, J. R. & Weiß, A., 2006, ApJ, 646, L49CrossRefGoogle Scholar
Claussen, M. J., Diamond, P. J., Braatz, J. A., Wilson, A. S., & Henkel, C. 1998 ApJ, 500, L129CrossRefGoogle Scholar
Darling, J. & Giovanelli, R. 2002, ApJ, 572, 810CrossRefGoogle Scholar
Elitzur, M. 2012, ApJ, 747, L33CrossRefGoogle Scholar
Falcke, H., Henkel, C., Peck, A. B., Hagiwara, Y., Prieto, M. A., & Gallimore, J. F. 2000 A&A, 358, 17Google Scholar
Greene, J. E., Peng, C. Y., Kim, M., Kuo, C.-Y., et al. 2010, ApJ, 721, 26CrossRefGoogle Scholar
Greenhill, L. J., Booth, R. S., Ellingsen, S. P., et al. 2003, ApJ, 590, 162CrossRefGoogle Scholar
Greenhill, L. J., Tilak, A., & Madejski, G. 2008, ApJ, 686, L13CrossRefGoogle Scholar
Henkel, C., Wang, Y. P., Falcke, H., Wilson, A. S., & Braatz, J. A. 1998, A&A, 335, 463Google Scholar
Herrnstein, J. R., Moran, J. M., Greenhill, L. J., Diamond, P. J., Inoue, M., Nakai, N., Miyoshi, M., Henkel, C., & Riess, A. 1999, Nature, 400, 539CrossRefGoogle Scholar
Humphreys, E. M. L., Greenhill, L. J., Reid, M. J., Beuther, H., Moran, J. M., Gurwell, M., Wilner, D. J., & Kondratko, P. T. 2005, ApJ, 634, 133CrossRefGoogle Scholar
Impellizzeri, C. M. V., McKean, J. P., Castangia, P., Roy, A. L., Henkel, C., Brunthaler, A., & Wucknitz, O. 2008, Nature, 456, 927CrossRefGoogle Scholar
Klöckner, H.-R., Baan, W. A., & Garrett, M. A. 2003, Nature, 421, 821CrossRefGoogle Scholar
König, S., Eckart, A., Henkel, C., & García-Marín, M. 2012 MNRAS, 420, 2263CrossRefGoogle Scholar
Komossa, S. 2008, Rev. Mexicana AyA (Conference Series), vol. 32, 86Google Scholar
Kondratko, P. T., Greenhill, L. J. & Moran, J. M. 2006, ApJ, 652, 136CrossRefGoogle Scholar
Kuo, C. Y., Braatz, J. A., Condon, J. J., et al. 2011, ApJ, 727, 20CrossRefGoogle Scholar
Lo, K. Y. 2005, ARAA, 43, 625CrossRefGoogle Scholar
Lonsdale, C. J. 2002, Cosmic Masers: From Proto-Stars to Black Holes. Proc. IAU Symposium No. 206 (San Francisco: ASP), p. 413Google Scholar
McKean, J. P., Impellizzeri, C. M. V., Roy, A. L., Castangia, P., Samuel, F., Brunthaler, A., Henkel, C., & Wucknitz, O. 2011, MNRAS, 410, 2506CrossRefGoogle Scholar
Miyoshi, M., Moran, J., Herrnstein, J., Greenhill, L., Nakai, N., Diamond, P., & Inoue, M. 1995, Nature, 373, 127CrossRefGoogle Scholar
Nenkova, M., Sirocky, M. M., Nikutta, R., Ivezi, Z., & Elitzur, M., 2006, ApJ, 685, 160CrossRefGoogle Scholar
Osterbrock, D. E. 1989, Astrophysics of gaseous nebulae and active galactic nuclei, ed. University Science BooksCrossRefGoogle Scholar
Parra, R., Conway, J. E., Elitzur, M., & Pihlström, Y. M. 2005, A&A, 443, 383Google Scholar
Peck, A. B., Henkel, C., Ulvestad, J. S., Brunthaler, A., Falcke, H., Elitzur, M., Menten, K. M., & Gallimore, J. F. 2003, ApJ, 590, 149CrossRefGoogle Scholar
Pérez-Torres, M. A., Alberdi, A., Romero-Canizales, C., & Bondi, M. 2010, A&A, 519, L5Google Scholar
Pihlström, Y. M., Conway, J. E., Booth, R. S., Diamond, P. J., & Polatidis, A. G. 2001, A&A, 377, 413Google Scholar
Polatidis, A. G. & Aalto, S. 2001, Galaxies and their Constituents at the Highest Angular Resolutions. Proc. IAU Symposium No. 205 (San Francisco: ASP), p. 1Google Scholar
Ramolla, M., Haas, M., Bennert, V. N., & Chini, R. 2011, A&A, 530, 147Google Scholar
Sawada-Satoh, S., Kameno, S., Nakamura, K., Namikawa, D., Shibata, K. M., & Inoue, M. 2008, ApJ, 680, 191CrossRefGoogle Scholar
Surcis, G., Tarchi, A., Henkel, C., Ott, J., Lovell, J., & Castangia, P. 2009, A&A, 502, 529Google Scholar
Tarchi, A., Henkel, C., Chiaberge, M., & Menten, K. M. 2003, A&A, 407, L33Google Scholar
Tarchi, A., Castangia, P., Henkel, C., & Menten, K. M. 2007a, New Astron. Revs, 51, 67CrossRefGoogle Scholar
Tarchi, A., Brunthaler, A., Henkel, C., Menten, K. M., Braatz, J. & Weiß, A. 2007b, A&A, 475, 497Google Scholar
Tarchi, A., Castangia, P., Henkel, C., Surcis, G., & Menten, K. M. 2011a, A&A, 525, 91Google Scholar
Tarchi, A., Castangia, P., Columbano, A., Panessa, F., & Braatz, J. A. 2011b, A&A, 532, 125Google Scholar
Tristram, K. R. W., Meisenheimer, K., Jaffe, W., et al. 2007, A&A, 474, 837Google Scholar
Urry, C. M. & Padovani, P. 1995, PASP, 107, 803CrossRefGoogle Scholar
Véron-Cetty, M., Véron, P., & Gonçalves, A. C. 2001, A&A, 372, 730Google Scholar
Zhang, J. S., Henkel, C., Kadler, M., Greenhill, L. J., Nagar, N., Wilson, A. S., & Braatz, J. A. 2006, A&A, 450, 933Google Scholar
Zhang, J. S., Henkel, C., Guo, Q., Wang, H. G., & Fan, J. H. 2010, ApJ, 708, 1528CrossRefGoogle Scholar
Zhang, J. S., Henkel, C., Guo, Q., & Wang, J. 2012, A&A, 538, 152Google Scholar
Zhu, G., Zaw, I., Blanton, M. R., & Greenhill, L. J. 2011, ApJ, 742, 73CrossRefGoogle Scholar