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Stacked Rest-Frame UV Spectra of Ly$\alpha$-Emitting and Continuum-Selected Galaxies at 2<z<3.5 by Berry, Michael; Gawiser, Eric; Guaita, Lucia; Padilla, Nelson; Treister, Ezequiel; Blanc, Guillermo; Ciardullo, Robin; Francke, Harold; Gronwall, Caryl is a scholarly article available to read on EtoBox.

What is Stacked Rest-Frame UV Spectra of Ly$\alpha$-Emitting and Continuum-Selected Galaxies at 2<z<3.5 about?

We present properties of individual and composite rest-UV spectra of continuum- and narrowband-selected star-forming galaxies (SFGs) at a redshift of 2<z<3.5 discovered by the MUSYC collaboration in the ECDF-S. Among our sample of 81 UV-bright SFGs, 59 have R<25.5, of which 32 have rest-frame equivalent widths W_{Ly{\alpha}}>20 {\AA}, the canonical limit to be classified as a LAE. We divide our dataset into subsamples based on properties we are able to measure for each individual galaxy: Ly{\alpha} equivalent width, rest-frame UV colors, and redshift. Among our subsample of galaxies with R<25.5, those with rest-frame W_{Ly{\alpha}}>20 {\AA} have bluer UV continua, weaker low-ionization interstellar absorption lines, weaker C IV absorption, and stronger Si II* nebular emission than those with W_{Ly{\alpha}}<20 {\AA}. We measure a typical velocity offset of {\Delta}v~600 km s$^{-1}$ between Ly{\alpha} emission and low-ionization absorption among our subsamples. We find that the interstellar component, as opposed to the stellar component, dominates the high-ionization absorption line profiles. We find the low- and high-ionization Si ionization states have similar kinematic properties,

Author

Berry, Michael; Gawiser, Eric; Guaita, Lucia; Padilla, Nelson; Treister, Ezequiel; Blanc, Guillermo; Ciardullo, Robin; Francke, Harold; Gronwall, Caryl

Published

2012

Language

EN