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Date and Time of the Query: 2019-06-18 T21:41:33 PDT
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For refcode 2006ApJ...650L..45B:
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2006ApJ...650L..45B Dusty Waves on a Starry Sea: The Mid-Infrared View of M31 P. Barmby, M. L. N. Ashby, L. Bianchi, C. W. Engelbracht, R. D. Gehrz, K. D. Gordon, J. L. Hinz, J. P. Huchra, R. M. Humphreys, M. A. Pahre, P. G. Perez-Gonzalez, E. F. Polomski, G. H. Rieke, D. A. Thilker, S. P. Willner, and C. E. Woodward Abstract. Mid-infrared observations of the Andromeda galaxy, M31, obtained with the Infrared Array Camera on board the Spitzer Space Telescope are presented. The image mosaics cover areas of approximately 3.7 deg x1.6 deg and include the satellite galaxies M32 and NGC 205. The appearance of M31 varies dramatically in the different mid-infrared bands, from the smooth bulge and disk of the old stellar population seen at 3.6 microns to the well-known "10 kpc ring" dominating the 8 microns image. The similarity of the 3.6 microns and optical isophotes and the nearly constant optical -- mid-infrared color over the inner 400" confirm that there is no significant extinction at optical wavelengths in M31's bulge. The nuclear colors indicate the presence of dust but not an infrared-bright active galactic nucleus. The integrated 8 microns nonstellar luminosity implies a star formation rate of 0.4 M_sun_ yr^-1^, consistent with other indicators that show M31 to be a quiescent galaxy. =========================================================================== 2007ApJ...655L..61B Erratum: "Dusty Waves on a Starry Sea: The Mid-Infrared View of M31" (ApJ 650, L45 [2006]) P. Barmby, M. L. N. Ashby, L. Bianchi, C. W. Engelbracht, R. D. Gehrz, K. D. Gordon, J. L. Hinz, J. P. Huchra, R. M. Humphreys, M. A. Pahre, P. G. Perez-Gonzalez, E. F. Polomski, G. H. Rieke, D. A. Thilker, S. P. Willner, and C. E. Woodward An incorrect value of the K-band mass-to-light ratio, MIL_K_, was used to compute the stellar mass of M31. Using the correct value of 0.80 derived from the fits in Table 1 of Bell & de Jong (2001), and assuming K - [3.6] = 0.3, the stellar mass implied by the extrapolated total magnitude ([3.6] = -0.34) is 1.1 10^11^ M{sun}. We thank F. Hammer for alerting us to this error. Key words: Galaxies: Individual: M31, Galaxies: ISM, Galaxies: Spiral, Galaxies: Stellar Content, Infrared: Galaxies ===========================================================================
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