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1.19. Mass-to-light ratios of spiral bulges in near-infrared

Published online by Cambridge University Press:  25 May 2016

T. Ichikawa ,
N. Itoh ,
K. Yanagisawa  and
Y. Sofue
T. Ichikawa
Affiliation:
Astronomical Institute, Tohoku University, Aoba, Sendai 980-77, Japan
N. Itoh
Affiliation:
Kiso Observatory, The University of Tokyo Mitake-mura, Kiso-gun, Nagano 397-01, Japan
K. Yanagisawa
Affiliation:
Department of Astronomy, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo 113, Japan
Y. Sofue
Affiliation:
Institute of Astronomy, The University of Tokyo, Mitaka, Tokyo 181, Japan

Extract

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Sofue (1996, 1997) presented accurate rotation curves of nearby galaxies, which are almost completely sampled from the inner to outer regions. The conspicuous common feature of the rotation curves is a steep rise at the inner bulge. The rise suggests a compact massive concentration near the nucleus (Sofue 1996). The study of the light distribution at the inner bulge demands accurate surface photometry at near-infrared wavelengths, where dust extinction is much less effective than in the optical. Most of Sofue's samples are nearby large galaxies, so that observations with a wide field view is clue to constructing reliable light distribution models.

Type
Part I. Stellar Cluster, Star Formation
Information
Symposium - International Astronomical Union , Volume 184: The Central Regions of the Galaxy and Galaxies , 1998 , pp. 53 - 54
Copyright
Copyright © Kluwer 1998 

References

Sofue, Y. (1996) ApJ, 458, 120.CrossRefGoogle Scholar
Sofue, Y. (1987) PASJ, 49,17.Google Scholar
Jablonka, J. and Arimoto, N. (1992), A&Ap, 255, 63.Google Scholar