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The Taurus, Perseus, and California cloud complexes

posted Sep 30, 2010, 8:07 AM by João Alves   [ updated Apr 26, 2011, 2:55 PM ]
This is paper III of the 2MASS wide field extinction maps series, this time mapping of a large region in the sky (~ 3500 deg2) towards the directions of Taurus, Perseus, and Aries. The map was constructed with the colors of ~23 million stars. We find a ~ 25° × 15° region close to the galactic plane (l ~ 135°, b ~ -14°) with small extinction (AK < 0.04 mag); we name this region the Perseus-Andromeda hole.  The maps have an amazing wealth of new information on molecular cloud structure, and are just gorgeous to look at.