Sheth, Kartik and Spalsbury, Lori and Scoville, Nick (2008) The Redshift Evolution of Bulges and Disks of Spiral Galaxies in COSMOS. In: Pathways Through an Eclectic Universe. ASP Conference Series. Vol.390. Astronomical Society of the Pacific , San Francisco, CA, pp. 426-430. ISBN 978-1-58381-650-9 http://resolver.caltech.edu/CaltechAUTHORS:20100730-094247493
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We present a preliminary analysis of the bulge and disk properties for a sample of over 4000 L* spiral galaxies at z < 0.84 from the COSMOS 2 square degree survey. We find that for early Hubble type spiral galaxies (Sa–Sb), the bulge-to-disk ratio is roughly constant over the last 7 Gyr of lookback time. This suggests that bulges of early type spirals were in place early on, consistent with other downsizing signatures. There is a monotonic increase in the bulge-to-disk ratios of late type spirals but that likely reflects the well-known decline in the star formation rate from z ~ 1 to the present. For this sample of L* spirals, we also find that the median exponential scale length of disks remains unchanged at 3.1 kpc from z = 0.0 to z = 0.84.
|Item Type:||Book Section|
|Additional Information:||© 2008 Astronomical Society of the Pacific.|
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|Deposited By:||Jason Perez|
|Deposited On:||02 Aug 2010 03:41|
|Last Modified:||07 Jul 2015 17:49|
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