Hostname: page-component-586b7cd67f-t7fkt Total loading time: 0 Render date: 2024-11-27T00:30:44.075Z Has data issue: false hasContentIssue false
  • English
  • Français

A New MIR/submm Diagnostic for Dust-Enshrouded AGN

Published online by Cambridge University Press:  12 April 2016

Martin Haas
Martin Haas*
Affiliation:
Max-Planck-Institut für Astronomie, D-69117 Heidelberg, Germany

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 show that the PAH 7.7μm to continuum 850μm flux ratio can be used to reveal high mid-infrared extinction in ultraluminous infrared galaxies (ULIRGs). While the submm radiation is optically thin and represents the emission from essentially all dust grains, the PAH strength (measured by the peak height of the Polycyclic Aromatic Hydocarbonates at 7.7μm) is sensitive to dust extinction in the mid-infrared (MIR). As an application of the new diagnostic, after dereddening of the central MIR continuum and with the assumption of a disk-like dust distribution seen under a tilted angle, we find increasing evidence for a hidden quasar in the archetypal ULIRG Arp220.

Type
Part 2. Infrared and Submillimeter Surveys for AGN
Information
International Astronomical Union Colloquium , Volume 184: AGN Surveys , 2002 , pp. 205 - 212
Copyright
Copyright © Astronomical Society of the Pacific 2002

References

Depoy, D.L., Becklin, E.E., Geballe, T.R., 1987, ApJ, 316, L63 CrossRefGoogle Scholar
Downes, D., Solomon, P.M., 1998, ApJ, 507, 615 CrossRefGoogle Scholar
Dunne, L., Eales, St., Edmunds, M., et al., 2000, MNRAS, 315, 115 CrossRefGoogle Scholar
Genzel, R., Lutz, D., Sturm, E., et al., 1998, ApJ, 498, 579 CrossRefGoogle Scholar
Haas, M., 2001, Habilitationsschrift at Universität HeidelbergGoogle Scholar
Haas, M., Klaas, U., Müller, S.A.H., Chini, R, Coulson, I., 2001, A&A, 367, L9 Google Scholar
Klaas, U., Haas, M., Müller, S.A.H., et al., 2001, A&A, submittedGoogle Scholar
Krügel, E., Siebenmorgen, R., 1994, A&A, 288 929 Google Scholar
Lisenfeld, U., Isaak, K.G., Hills, R., 2000, MNRAS, 312, 433 CrossRefGoogle Scholar
Mathis, J.S., Mezger, P.G., Panagia, N., 1983, A&A, 128, 212 Google Scholar
Rigopoulou, D., Lawrence, A., Rowan-Robinson, M., 1996, MNRAS, 278, 1049 CrossRefGoogle Scholar
Rigopoulou, D., Spoon, H.W., Genzel, R., et al., 1999, AJ, 118, 2625 CrossRefGoogle Scholar
Sakamoto, K., Scoville, N.Z., Yun, M.S., et al., 1999, ApJ, 514, 68 CrossRefGoogle Scholar
Scoville, N.Z., Evans, A.S., Dinshaw, N., et al., 1998, ApJ, 492, L107 CrossRefGoogle Scholar
Smith, H.E., Lonsdale, C.J., Lonsdale, C.J., Diamond, P.J, 1998, ApJ, 493, L21 CrossRefGoogle Scholar
Soifer, B.T., Neugebauer, G., Matthews, K. et al., 1999, ApJ, 513, 207 CrossRefGoogle Scholar