Supermassive black hole or nuclear bar in M31?

Details Supermassive black hole or nuclear bar in M31? Supermassive black hole or nuclear bar in M31?

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.232p..13g&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 232, June 1, 1988, p. 13P-20P.

Astronomy and Astrophysics

Astronomy

22

Andromeda Galaxy, Black Holes (Astronomy), Galactic Nuclei, Mass To Light Ratios, Spiral Galaxies, Angular Velocity, High Resolution, Velocity Distribution

Scientific paper

On the basis of high-resolution kinematic observations it has recently been suggested that the nucleus of M31 is disc-like and contains a supermassive black hole. Here the author argues that the central kinematics in M31 can equally well be explained without black hole, if the observed nucleus is a rotating nuclear bar, seen end-on as implied by the Stratoscope II photometry. Then the large apparent rotation velocities are due to the large non-circular streaming velocities in the bar, and the required mass-to-light ratio is M/Lr ≅ 8 with no allowance yet made for dust absorption.

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