Hostname: page-component-77c89778f8-7drxs Total loading time: 0 Render date: 2024-07-23T08:23:06.880Z Has data issue: false hasContentIssue false
  • English
  • Français

Photometric studies of PAH emission from distant infrared galaxies

Published online by Cambridge University Press:  17 August 2012

Toshinobu Takagi ,
Hideo Matsuhara ,
Takehiko Wada  and
Youichi Ohyama
Toshinobu Takagi
Affiliation:
Institute of Space and Astronautical Science, JAXA, Sagamihara, Kanagawa 229-8510, Japan
Hideo Matsuhara
Affiliation:
Institute of Space and Astronautical Science, JAXA, Sagamihara, Kanagawa 229-8510, Japan
Takehiko Wada
Affiliation:
Institute of Space and Astronautical Science, JAXA, Sagamihara, Kanagawa 229-8510, Japan
Youichi Ohyama
Affiliation:
Academia Sinica, Institute of Astronomy and Astrophysics, Taiwan email: takagi@ir.isas.jaxa.jp
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.

Using extensive mid-IR datasets from AKARI, i.e. 9 band photometry covering the wavelength range from 2 μm to 24 μm and the unbiased spectroscopic survey for sources with Sν (9μm)>0.3 mJy, we investigated the PAHs emission features in distant starburst galaxies. PAH-selected galaxies, selected with an extremely red mid-IR colour due to PAHs, are found to have a peculiar rest-frame 11-to-8 μm flux ratio, which is systematically smaller than nearby starburst/AGN spectral templates. This may indicate a systematic difference in the physical condition of the ISM between nearby and distant starburst galaxies.

Keywords

infrared: galaxiesgalaxies: starburstISM: evolutiondust
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S284: The Spectral Energy Distribution of Galaxies , September 2011 , pp. 456 - 459
Copyright
Copyright © International Astronomical Union 2012

References

Li, A. & Draine, B. T. 2001, ApJ, 554, 778CrossRefGoogle Scholar
Spoon, H. W. W., Marshall, J. A., Houck, J. R., et al. 2007, ApJ, 654, L49.CrossRefGoogle Scholar
Takagi, T., Matsuhara, H., Wada, T., et al. 2007, PASJ, 59, 557CrossRefGoogle Scholar
Takagi, T., Arimoto, N., & Hanami, H. 2003, MNRAS, 340, 813CrossRefGoogle Scholar
Takagi, T., Ohyama, Y., Goto, T., et al. 2010, A&A 514 A5+Google Scholar
Wada, T., Matsuhara, H., Oyabu, S., et al. 2008, PASJ, 60, 517CrossRefGoogle Scholar