Planetary camera observations of the double nucleus of M31

Details Planetary camera observations of the double nucleus of M31 Planetary camera observations of the double nucleus of M31

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....106.1436l&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 106, no. 4, p. 1436-1447, 1710-1712.

Astronomy and Astrophysics

Astronomy

163

Galactic Structure, Spiral Galaxies, Star Clusters, Stellar Luminosity, Astronomical Photometry, Black Holes (Astronomy), Isophotes, Star Distribution

Scientific paper

HST Planetary Camera images obtained in the V and I band for M31 show its inner nucleus to consist of two components that are separated by 0.49 arcsec. The nuclear component with lower surface brightness closely coincides with the bulge photocenter and is argued to be at the kinematic center of the galaxy. It is surmised that, if dust absorption generates the asymmetric nuclear morphology observed, the dust grain size must either be exceptionally large, or the dust optical depth must be extremely high; the higher surface-brightness and off-center nuclear component may alternatively be a separate stellar system.

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