TY - JOUR
T1 - The HETDEX Survey
T2 - The Lyα Escape Fraction from 3D-HST Emission-Line Galaxies at z ∼ 2
AU - Weiss, Laurel H.
AU - Bowman, William P.
AU - Ciardullo, Robin
AU - Zeimann, Gregory R.
AU - Gronwall, Caryl
AU - Mentuch Cooper, Erin
AU - Gebhardt, Karl
AU - Hill, Gary J.
AU - Blanc, Guillermo A.
AU - Farrow, Daniel J.
AU - Finkelstein, Steven L.
AU - Gawiser, Eric
AU - Janowiecki, Steven
AU - Jogee, Shardha
AU - Schneider, Donald P.
AU - Wisotzki, Lutz
N1 - Publisher Copyright:
© 2021. The American Astronomical Society. All rights reserved..
PY - 2021/5/10
Y1 - 2021/5/10
N2 - In this work, we measure the Lyα escape fraction of 935 [O iii]-emitting galaxies between 1.9 < z < 2.35 by comparing stacked spectra from the Hubble Space Telescope/WFC3's near-IR grism to corresponding stacks from the Hobby-Eberly Telescope Dark Energy Experiment's Internal Data Release 2. By measuring the stacks' Hβ to Lyα ratios, we determine the Lyα escape fraction as a function of stellar mass, star-formation rate, internal reddening, size, and [O iii]/Hβ ratio. We show that the escape fraction of Lyα correlates with a number of parameters, such as galaxy size, star-formation rate, and nebular excitation. However, we also demonstrate that most of these relations are indirect, and that the primary variables controlling the escape of Lyα are likely to be stellar mass and internal extinction. Overall, the escape of Lyα declines from ⪆16% in galaxies with to ≲1% for systems with, with the sample's mean escape fraction being.
AB - In this work, we measure the Lyα escape fraction of 935 [O iii]-emitting galaxies between 1.9 < z < 2.35 by comparing stacked spectra from the Hubble Space Telescope/WFC3's near-IR grism to corresponding stacks from the Hobby-Eberly Telescope Dark Energy Experiment's Internal Data Release 2. By measuring the stacks' Hβ to Lyα ratios, we determine the Lyα escape fraction as a function of stellar mass, star-formation rate, internal reddening, size, and [O iii]/Hβ ratio. We show that the escape fraction of Lyα correlates with a number of parameters, such as galaxy size, star-formation rate, and nebular excitation. However, we also demonstrate that most of these relations are indirect, and that the primary variables controlling the escape of Lyα are likely to be stellar mass and internal extinction. Overall, the escape of Lyα declines from ⪆16% in galaxies with to ≲1% for systems with, with the sample's mean escape fraction being.
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U2 - 10.3847/1538-4357/abedb9
DO - 10.3847/1538-4357/abedb9
M3 - Article
AN - SCOPUS:85106034004
SN - 0004-637X
VL - 912
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 100
ER -