Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-27T12:08:28.450Z Has data issue: false hasContentIssue false
  • English
  • Français

Nobeyama millimeter array observationsof luminous infrared galaxies

Published online by Cambridge University Press:  04 October 2008

C. Kramer ,
S. Aalto ,
R. Simon  and
M. Imanishi
M. Imanishi*
Affiliation:
National Astronomical Observatory of Japan, 2-21-1, Osawa, Mitaka, Tokyo 181-8588, Japan Department of Astronomy, School of Science, Graduate University for Advanced Studies, Mitaka, Tokyo 181-8588, Japan
Get access

Abstract

We present the results of systematic millimeter interferometricobservations of luminous infrared galaxies (LIRGs), using the NobeyamaMillimeter Array.We observed HCN (J = 1–0) and HCO+ (J = 1–0) emission linessimultaneously, and derived their brightness-temperature ratios, toinvestigate whether the observed ratios are similar to those found inAGN-dominated nuclei or starburst galaxies. LIRGs with (without) luminous buried AGN signatures in our infraredspectra tend to show high (low) HCN (J = 1–0) to HCO+ (J = 1–0)brightness-temperature ratios as seen in galaxy nuclei dominated by AGNs (starbursts). The high ratios in buried AGN candidates could be explained by theenhanced HCN abundance, and/or infrared radiative pumping of the HCNmolecule, in the close vicinity of an AGN.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 31: Far-Infrared Workshop 2007 , 2008 , pp. 93 - 96
Copyright
© EAS, EDP Sciences, 2008

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Imanishi, M., et al., 2004, AJ, 128, 2037 CrossRef
Imanishi, M., Nakanishi, K., & Kohno, K., 2006, AJ, 131, 2888 CrossRef
Imanishi, M., & Nakanishi, K., 2006, PASJ, 58, 813 CrossRef
Imanishi, M., et al., 2007, AJ, 134, 2366 CrossRef
Kohno, K., 2005 [astro-ph/0508420]