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Merger in M31’s Bulge & 3-D Accretion – A BVRI CCD Study at Kiso –

Published online by Cambridge University Press:  12 April 2016

Yoshiaki Sofue
Yoshiaki Sofue*
Affiliation:
Institute of Astronomy, University of Tokyo, Mitaka, Takya 181, and Kiso Observatory, University of Tokyo, Kiso, Nagano 397-01 email:sofue@sof.mtk.ioa.s.u-tokyo.ac.jp

Abstract

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By contrast-enhancing and colour-excess analyses of BV RI CCD images of the central 12’.5 × 12’.5 region of M31 taken with the Kiso 105 cm Schmidt telescope, we found a “face-on” spiral feature of dark clouds, which are associated with Hα spirals. The feature can be understood as being due to accretion of gas clouds from companion galaxies and/or from a merger galaxy in the past 108–9 years.

Type
XI. Galaxies
Information
International Astronomical Union Colloquium , Volume 148: The Future Utilisation of Schmidt Telescopes , 1995 , pp. 409 - 414
Copyright
Copyright © Astronomical Society of the Pacific 1995

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