Mark Hammergren, Michael Solontoi, Geza Gyuk, Andrew Puckett
We present the spectra of 60 asteroids, including 47 V-types observed during
the first phase of the Adler V-Type Asteroid (AVAST) Survey. SDSS photometry
was used to select candidate V-type asteroids for follow up by nature of their
very blue i - z color. 47 of the 61 observed candidates were positively
classified as V-type asteroids, while an additional six show indications of a
0.9 {\mu}m feature consistent with V-type spectra, but not sufficient for
formal classification. Four asteroids were found to be S-type, all of which had
i - z values very near the adopted AVAST selection criteria of i - z \leq -0.2,
including one candidate observed well outside the cut (at a mean i - z of
-0.11). Three A-type asteroids were also identified. Six V-type asteroids were
identified beyond the 3:1 mean motion resonance with Jupiter, and six more were
found with low (< 5 deg) inclination, placing these asteroids outside of the
normal dynamical range of classic Vestoids, and are suggestive of a non-Vesta
origin for at least some of the population.
View original:
http://arxiv.org/abs/1202.4424
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