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Herschel spectroscopic observations of Zw 049.057 and Arp 299a

Part of: IAU Issue 315 - From Interstellar Clouds...

Published online by Cambridge University Press:  12 September 2016

Niklas Falstad ,
Eduardo González-Alfonso  and
Susanne Aalto
Niklas Falstad
Affiliation:
Department of Earth and Space Sciences, Chalmers University of Technology, Onsala Space Observatory, 439 92 Onsala, Sweden email: [email protected]
Eduardo González-Alfonso
Affiliation:
Universidad de Alcalá de Henares, Departamento de Física, Campus Universitario, E-28871 Alcalá de Henares, Madrid, Spain
Susanne Aalto
Affiliation:
Department of Earth and Space Sciences, Chalmers University of Technology, Onsala Space Observatory, 439 92 Onsala, Sweden email: [email protected]
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Abstract

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The presence of compact obscured nuclei in luminous infrared galaxies (LIRGs) is very well probed by the detection of highly excited absorption lines of OH and H2O in the far-infrared (far-IR), which require warm and optically thick dust to pump the high-lying rotational levels. We are using a spherically symmetric radiative transfer code to model the H2O lines, OH lines and continuum from these objects. We discuss the results and analysis of Herschel observations of the compact obscured nucleus in the extremely H2O luminous LIRG Zw 049.057. In this galaxy we have found very high H2O abundances in a Compton thick compact core. Abundant 18O bearing species also suggest the presence of a relatively young starburst. We compare this to our observations and modeling of the luminous merger component Arp 299a, which is another source with prominent H2O and OH lines. Our preliminary results, however, suggest that its nuclear activity is in a different evolutionary state compared to Zw 049.057.

Keywords

ISM: molecules–Galaxies: ISM–Line: formation– Infrared: galaxies
Type
Poster Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S315: From Interstellar Clouds to Star-Forming Galaxies: Universal Processes? , August 2015 , E18
Copyright
Copyright © International Astronomical Union 2016 

References

Aalto, S., Muller, S., Sakamoto, K., et al. 2012, A&A, 546, A68 Google Scholar
Costagliola, F. & Aalto, S. 2010, A&A, 515, A71 Google Scholar
Costagliola, F., Aalto, S., Sakamoto, K., et al. 2013, A&A, 556, A66 Google Scholar
Falstad, N., González-Alfonso, E., Aalto, S. 2015, A&A, 580, A52 Google Scholar
González-Alfonso, E. & Cernicharo, J. 1999, A&A, 322, 938 Google Scholar
González-Alfonso, E. & Cernicharo, J. 1999, ApJ, 525, 845 Google Scholar
González-Alfonso, E., Fischer, J., Sturm, E., et al. 2015, ApJ, 800, 69 Google Scholar
Sakamoto, K., Aalto, S., Costagliola, F., et al. 2013, ApJ, 764, 42 Google Scholar