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New Infrared Diffuse Interstellar Bands in the Galactic Center and Elsewhere

Published online by Cambridge University Press:  21 February 2014

T. R. Geballe
T. R. Geballe*
Affiliation:
Gemini Observstory, 670 N. A'ohoku Place, Hilo, HI 96720U.S.A. email: tgeballe@gemini.edu
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Abstract

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This paper updates the recent discovery of over a dozen new diffuse interstellar bands (DIBs), first in H-band spectra of stars in the Galactic center (GC) and toward stars in the Cygnus OB2 Association. The H-band DIBs, which currently number 15, are the longest wavelength DIBs reported to date and are the first found on sightlines toward the Galactic center. K-band (2.0-2.5 μm) spectra of the GC stars do not reveal additional DIBs. Comparison of the velocity profile of the strongest of the new DIBs in the sightline toward GCS3-2 (in the GC) with that toward Cygnus OB2 No. 9 and also with the broad velocity profiles of H3+ lines toward GCS3-2 confirm that a significant fraction of the diffuse material producing the DIB absorptions on sightlines to the GC is located within the central few hundred parsecs of the Galaxy.

Keywords

astrochemistryISM: lines and bandsGalaxy: center
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S297: The Diffuse Interstellar Bands , May 2013 , pp. 64 - 67
Copyright
Copyright © International Astronomical Union 2014 

References

Figer, D. F., McLean, I. S., & Morris, M. 1999, ApJ, 514, 202Google Scholar
Geballe, T. R., Najarro, F., Figer, D. F., Schlegelmilch, B. W., & de la Fuente, D. 2011, Nature, 479, 200Google Scholar
Joblin, C., Maillard, J. P., d'Hendecourt, L., & Leger, A. 1990, Nature, 346, 729Google Scholar
McCall, B. J., Hinkle, K. H., Geballe, T. R., et al. 2002 ApJ, 567, 391Google Scholar
Moneti, A., Glass, I. S., & Moorwood, A. 1994, MNRAS, 268, 194Google Scholar
Nagata, T., Woodward, C. E., Shure, M., Pipher, J. L., & Okuda, H. 1990, ApJ, 351, 83Google Scholar
Oka, T., Geballe, T. R., Goto, M., Usuda, T., & McCall, B. J. 2005, ApJ, 632, 882Google Scholar
Okuda, H.et al. 1990 ApJ, 351, 89Google Scholar
Sodroski, T. J., Odegard, N., Dwek, E., et al. 1995 ApJ. 452, 262Google Scholar
Whittet, D. C. B., Boogert, A. C. A., Gerakines, P. A., et al. 1997, ApJ, 490, 729Google Scholar