| タイトル | Extreme Emission Line Galaxies in CANDELS: Broad-Band Selected, Star-Bursting Dwarf Galaxies at Z greater than 1 |
| 本文（外部サイト） | http://hdl.handle.net/2060/20110022599 |
| 著者（英） | Lai, K.; Wuyts, S.; VanDerWel, A.; Faber, S. M.; Grogin, N. A.; Trump, J. R.; Kocevski, D. D.; Hathi, N. P.; Rodney, S. A.; Bell, E. F.; Finkelstein, S. L.; Koekemoer, A. M.; Ferguson, H. C.; Koo, D.; Rix, H.-W.; Weiner, B. J.; Lee, K.-S.; Straughn, A. N.; Newman, J. A.; Guo, Y.; Scarlata, C.; Dunlop, J. S. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2011-07-14 |
| 言語 | eng |
| 内容記述 | We identify an abundant population of extreme emission line galaxies at redshift z=1.6 - 1.8 in the Cosmic Assembly Near-IR Deep Extragalactic Legacy Survey (CANDELS) imaging from Hubble Space Telescope/Wide Field Camera 3 (HST/WFC3). 69 candidates are selected by the large contribution of exceptionally bright emission lines to their near-infrared, broad-band fluxes. Supported by spectroscopic confirmation of strong [OIII] emission lines - with equivalent widths approximately 1000A - in the four candidates that have HST/WFC3 grism observations, we conclude that these objects are dwarf galaxies with approximately 10(exp 8) solar mass in stellar mass, undergoing an enormous star-burst phase with M*/M* of only approximately 10 Myr. The star formation activity and the co-moving number density (3.7 x 10(exp -4) Mpc(exp -3)) imply that strong, short-lived bursts play a significant, perhaps even dominant role in the formation and evolution of dwarf galaxies at z greater than 1. The observed star formation activity can produce in less than 5 Gyr the same amount of stellar mass density as is presently contained in dwarf galaxies. Therefore, our observations provide a strong indication that the stellar populations of present-day dwarf galaxies formed mainly in strong, short-lived bursts, mostly at z greater than 1. |
| NASA分類 | Astronomy |
| レポートNO | GSFC.JA.5071.2011 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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