Hostname: page-component-8448b6f56d-cfpbc Total loading time: 0 Render date: 2024-04-20T11:45:31.343Z Has data issue: false hasContentIssue false
  • English
  • Français

Spitzer Observations of Tidal Dwarf Galaxies

Published online by Cambridge University Press:  01 June 2007

Sarah J. U. Higdon  and
James L. Higdon
Sarah J. U. Higdon
Affiliation:
Physics Department, Georgia Southern University, Statesboro, GA 30460 Astronomy Department, Cornell University, Ithaca, NY 14853 email: shigdon@georgiasouthern.edu
James L. Higdon
Affiliation:
Physics Department, Georgia Southern University, Statesboro, GA 30460
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.

We present Spitzer observations of Tidal Dwarf Galaxies (TDGs) in three interacting systems: NGC 5291, Arp 105 & Stephan's Quintet. The spectra show bright emission from polyaromatic hydrocarbons (PAHs), nebular lines and warm molecular hydrogen, characteristic of recent episodes of star formation. The PAH emission that falls in the IRAC 8.0 μm band leads to the TDGs having an extremely red IRAC color, with [4.5] − [8.0] > 3. The emission from PAHs is characterized by a model with mainly neutral 100-C PAH atoms.

Keywords

galaxies: dwarfgalaxies: evolutiongalaxies: formationinfrared: galaxies
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S244: Dark Galaxies and Lost Baryons , June 2007 , pp. 356 - 357
Copyright
Copyright © International Astronomical Union 2008

References

Draine, B. T., & Li, A. 2001, ApJ, 551, 807CrossRefGoogle Scholar
Helou, G., Lu, N. Y., Werner, M. W., Malhotra, S., & Silbermann, N. 2000 ApJ, 532, L21CrossRefGoogle Scholar
Higdon, S. J. U. et al. 2004 PASP, 116, 975CrossRefGoogle Scholar
Higdon, S. J. U., Higdon, J. L., & Marshall, J. 2006, ApJ, 640, 768CrossRefGoogle Scholar
Higdon, S. J. U., Higdon, J. L. 2007 in prep.Google Scholar
Hunsberger, S. D., Charlton, J., & Zaritsky, D. 1996 ApJ, 462, 50CrossRefGoogle Scholar
Pahre, M. A., Ashby, M. L., Fazio, G. G., & Willner, S. P. 2004 ApJS, 154, 235CrossRefGoogle Scholar
Smith, J. D. T., & Draine, B. T., et al. , 2007, ApJ, 656, 770CrossRefGoogle Scholar
Toomre, A. & Toomre, J. 1972, ApJ, 178, 623CrossRefGoogle Scholar