Infrared photometry of the semistellar nucleus of M31
New broad-band infrared JHK data and narrow-band CO and H_2O indices for the semistellar nucleus of M31 are presented. The data were obtained specifically to test a prediction of a recent synthesis model by Faber and French in which the ratio of dwarf-to-giant light increases strongly in going from the bulge to the nucleus of M31. The new infrared data do not support such a model. Some alternative explanations for the behavior of the various indices are given, but the apparent conflict between the Faber-French interpretation of the strength of the Na i λ8190 feature and our data is not satisfactorily resolved.
Additional Information© American Astronomical Society • Provided by the NASA Astrophysics Data System. Received 1980 February 25; accepted 1980 March 25. Cerro Tololo Inter-American Observatory, which is supported by the National Science Foundation under contract no. AST 78-27879. This work was supported in part by NSF grant AST 77-20516 and NASA grant NGL 05-002-207.
Published - 1980ApJ___240__779P.pdf