Mainzer, A. and Masiero, J. and Grav, T. and Bauer, J. and Tholen, D. J. and McMillan, R. S. and Wright, E. and Spahr, T. and Cutri, R. M. and Walker, R. and Mo, W. and Watkins, J. and Hand, E. and Maleszewski, C. (2012) NEOWISE Studies of Asteroids with Sloan Photometry: Preliminary Results. Astrophysical Journal, 745 (1). p. 7. ISSN 0004-637X http://resolver.caltech.edu/CaltechAUTHORS:20120412-151623193
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We have combined the NEOWISE and Sloan Digital Sky Survey data to study the albedos of 24,353 asteroids with candidate taxonomic classifications derived using Sloan photometry. We find a wide range of moderate to high albedos for candidate S-type asteroids that are analogous to the S complex defined by previous spectrophotometrically based taxonomic systems. The candidate C-type asteroids, while generally very dark, have a tail of higher albedos that overlaps the S types. The albedo distribution for asteroids with a photometrically derived Q classification is extremely similar to those of the S types. Asteroids with similar colors to (4) Vesta have higher albedos than the S types, and most have orbital elements similar to known Vesta family members. Finally, we show that the relative reflectance at 3.4 and 4.6 μm is higher for D-type asteroids and suggest that their red visible and near-infrared spectral slope extends out to these wavelengths. Understanding the relationship between size, albedo, and taxonomic classification is complicated by the fact that the objects with classifications were selected from the visible/near-infrared Sloan Moving Object Catalog, which is biased against fainter asteroids, including those with lower albedos.
|Additional Information:||© 2012 American Astronomical Society. Received 2011 July 14; accepted 2011 October 3; published 2011 December 27. This publication makes use of data products from the Widefield Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. This publication also makes use of data products from NEOWISE, which is a project of the Jet Propulsion Laboratory/California Institute of Technology, funded by the Planetary Science Division of the National Aeronautics and Space Administration. We thank our referee, Dr. Schelte J. Bus, for his comments, which have greatly improved this paper. We gratefully acknowledge the extraordinary services specific to NEOWISE contributed by the International Astronomical Union’s Minor Planet Center, operated by the Harvard-Smithsonian Center for Astrophysics, and the Central Bureau for Astronomical Telegrams, operated by Harvard University. This research has made use of the NASA/IPAC Infrared Science Archive, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.|
|Subject Keywords:||atlases; catalogs; infrared: general; minor planets, asteroids: general; surveys|
|Official Citation:||NEOWISE Studies of Asteroids with Sloan Photometry: Preliminary Results A. Mainzer et al. 2012 ApJ 745 7|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Jason Perez|
|Deposited On:||13 Apr 2012 18:02|
|Last Modified:||26 Dec 2012 15:03|
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