학술논문
The Luminosity Function of Early-Type Galaxies at z~0.75
Document Type
Working Paper
Author
Cross, N. J. G.; Bouwens, R.; Benitez, N.; Blakeslee, J. P.; Menanteau, F.; Ford, H. C.; Goto, T.; Holden, B.; Martel, A. R.; Overzier, R.; Gronwall, C.; Homeier, N.; Ardila, D. R.; Bartko, F.; Broadhurst, T. J.; Brown, R. A.; Burrows, C. J.; Cheng, E. S.; Clampin, M.; Feldman, P. D.; Franx, M.; Golimowski, D. A.; Hartig, G. F.; Illingworth, G. D.; Infante, L.; Kimble, R. A.; Krist, J. E.; Lesser, M. P.; Meurer, G. R.; Miley, G. K.; Postman, M.; Rosati, P.; Sirianni, M.; Sparks, W. B.; Tran, H. D.; Tsvetanov, Z. I.; White, R. L.; Zheng, W.
Source
Subject
Language
Abstract
We measure the luminosity function of morphologically selected E/S0 galaxies from $z=0.5$ to $z=1.0$ using deep high resolution Advanced Camera for Surveys imaging data. Our analysis covers an area of $48\Box\arcmin$ (8$\times$ the area of the HDF-N) and extends 2 magnitudes deeper ($I\sim24$ mag) than was possible in the Deep Groth Strip Survey (DGSS). At $0.51.7$, E/S0 galaxies at brighter luminosities ($M_B<-20.1$), but are increasingly different at fainter magnitudes where `blue' galaxies are both smaller and have lower Sersic parameters. Fits of the colors to stellar population models suggest that most E/S0 galaxies have short star-formation time scales ($\tau<1$ Gyr), and that galaxies have formed at an increasing rate from $z\sim8$ until $z\sim2$ after which there has been a gradual decline.
Comment: 39 pages, 21 figures, accepted in AJ
Comment: 39 pages, 21 figures, accepted in AJ