The Ly-alpha Properties of Faint Galaxies at z2-3 with Systemic Redshifts and Velocity Dispersions from Keck-MOSFIRE
| Autor: | Alice E. Shapley, Nicholas P. Konidaris, Ian S. McLean, Allison L. Strom, Ryan F. Trainor, Charles C. Steidel, Daniel B. Nestor, Gregory N. Mace, Naveen A. Reddy, Gwen C. Rudie, Keith Matthews, Dawn K. Erb, Milan Bogosavljević, David R. Law, Max Pettini, Kristin R. Kulas |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Physics
Opacity Metallicity FOS: Physical sciences Astronomy and Astrophysics Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics - Astrophysics of Galaxies Galaxy Redshift Stars Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) Magnitude (astronomy) Emission spectrum Equivalent width Astrophysics::Galaxy Astrophysics |
| Popis: | We study the Lya profiles of 36 spectroscopically-detected Lya-emitters (LAEs) at z2-3, using Keck MOSFIRE to measure systemic redshifts and velocity dispersions from rest-frame optical nebular emission lines. The sample has a median optical magnitude R=26.0, and ranges from R23 to R>27, corresponding to rest-frame UV absolute magnitudes M_UV-22 to M_UV>-18.2. Dynamical masses range from M_dyn3 sigma significance: brighter galaxies with larger velocity dispersions tend to have larger values of dv_Lya. We also make use of a comparison sample of 122 UV-color-selected R Accepted for publication in ApJ. 20 pages, 9 figures |
| Databáze: | OpenAIRE |
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