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The Rest-Frame Optical Spectroscopic Properties of Ly-Emitters at : The Physical Origins of Strong Ly Emission
Ryan F. Trainor, Allison L. Strom, Charles C. Steidel +1
We present rest-frame optical spectra of 60 faint (; ) Ly-selected galaxies (LAEs) at . The average LAE is consistent with the extreme…
Nebular Emission Line Ratios in z~2-3 Star-Forming Galaxies with KBSS-MOSFIRE: Exploring the Impact of Ionization, Excitation, and Nitrogen-to-Oxygen Ratio
Allison L. Strom, Charles C. Steidel, Gwen C. Rudie +3
We present a detailed study of the rest-optical (3600-7000 Angstrom) nebular spectra of ~380 star-forming galaxies at z~2-3 obtained with Keck/MOSFIRE as part of the Keck Baryonic…
Q1549-C25: A Clean Source of Lyman-Continuum Emission at
Alice E. Shapley, Charles C. Steidel, Allison L. Strom +5
We present observations of Q1549-C25, an ~L* star-forming galaxy at z=3.15 for which Lyman-continuum (LyC) radiation is significantly detected in deep Keck/LRIS spectroscopy. We fi…
A High Fraction of Ly-alpha-Emitters Among Galaxies with Extreme Emission Line Ratios at z ~ 2
Dawn K. Erb, Max Pettini, Charles C. Steidel +5
Star-forming galaxies form a sequence in the [OIII]/H-beta vs. [NII]/H-alpha diagnostic diagram, with low metallicity, highly ionized galaxies falling in the upper left corner. Dra…
Reconciling the Stellar and Nebular Spectra of High Redshift Galaxies
C. C. Steidel, A. L. Strom, M. Pettini +3
We present a combined analysis of rest-frame far-UV (1000-2000 A) and rest-frame optical (3600-7000 A) composite spectra formed from very deep observations of a sample of 30 star-f…
Binary Stars Can Provide the "Missing Photons" Needed for Reionization
Xiangcheng Ma, Philip F. Hopkins, Daniel Kasen +4
Empirical constraints on reionization require galactic ionizing photon escape fractions fesc>20%, but recent high-resolution radiation-hydrodynamic calculations have consistently f…