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Intensity ratios for XDR/PDR identification

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

Published online by Cambridge University Press:  12 September 2016

C.-E. Green ,
M. R. Cunningham ,
J. A. Green ,
J. R. Dawson ,
P. A. Jones ,
Á. R. López-Sánchez ,
L. Verdes-Montenegro ,
C. Henkel ,
W. A. Baan  and
S. Martín
C.-E. Green
Affiliation:
School of Physics, University of New South Wales, Sydney, NSW, 2052, Australia Email: claire.elise.green@gmail.com CSIRO Astronomy & Space Science, Australia Telescope National Facility, PO Box 76, Epping, NSW 1710, Australia
M. R. Cunningham
Affiliation:
School of Physics, University of New South Wales, Sydney, NSW, 2052, Australia Email: claire.elise.green@gmail.com
J. A. Green
Affiliation:
CSIRO Astronomy & Space Science, Australia Telescope National Facility, PO Box 76, Epping, NSW 1710, Australia SKA Organisation, Jodrell Bank Observatory, Lower Withington, Macclesfield SK11 9DL, UK
J. R. Dawson
Affiliation:
CSIRO Astronomy & Space Science, Australia Telescope National Facility, PO Box 76, Epping, NSW 1710, Australia Department of Physics and Astronomy and MQ Research Centre in Astronomy, Astrophysics and Astrophotonics, Macquarie University, NSW 2109, Australia
P. A. Jones
Affiliation:
School of Physics, University of New South Wales, Sydney, NSW, 2052, Australia Email: claire.elise.green@gmail.com
Á. R. López-Sánchez
Affiliation:
Australian Astronomical Observatory, PO Box 915, North Ryde, NSW 1670, Australia Department of Physics and Astronomy and MQ Research Centre in Astronomy, Astrophysics and Astrophotonics, Macquarie University, NSW 2109, Australia
L. Verdes-Montenegro
Affiliation:
Instituto de Astrofísica de Andalucía (CSIC), Glorieta de la Astronomía, s/n. E-18008, Granada, Spain
C. Henkel
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany Astronomy Department, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
W. A. Baan
Affiliation:
Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Lu, Xuhui, Shanghai 200030, P.R. China Netherlands Institute for Radio Astronomy, ASTRON, Oude Hoogeveensedijk 4, 7991 PD Dwingeloo, The Netherlands
S. Martín
Affiliation:
Institut de Radio Astronomie Millimétrique, 300 rue de la Piscine, Dom. Univ., 38406, St. Martin d'Hères, France
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Abstract

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The intensity ratios of HCO+/HCN and HNC/HCN (1-0) reveal the relative influence of star formation and active galactic nuclei (AGN) or black holes on the circum-nuclear gas of a galaxy, allowing the identification of X-ray dominated regions (XDRs) and Photon-dominated regions (PDRs). It is not always clear in the literature how this intensity ratio calculation has been, or should be performed. This paper discusses ratio calculation methods for interferometric data.

Keywords

astrochemistrygalaxies: activegalaxies: ISMISM: moleculesstars: formation
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 , E30
Copyright
Copyright © International Astronomical Union 2016 

References

Baan, W. A., Henkel, C., Loenen, A. F., Baudry, A., Wiklind, T., 2008, A&A, 477, 747 Google Scholar
Loenen, A. F., Spaans, M., Baan, W. A., Meijerink, R., 2008, A&A, 488, L5 Google Scholar
Martín, S., et al., 2015, A&A, 573, A116 Google Scholar
Meijerink, R., Spaans, S., Israel, F. P., 2007, A&A, 461, 793 Google Scholar