Predicting Lyα Emission from Galaxies via Empirical Markers of Production and Escape in the KBSS
Predicting Lyα Emission from Galaxies via Empirical Markers of Production and Escape in the KBSS
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通过 KBSS 中产生和逃逸的经验标记来预测星系的 Lyα 发射
DOI:
10.3847/1538-4357/ab4993
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Rachel L. Theios
中科院分区:
文献类型:
--
作者:
R. Trainor;A. Strom;C. Steidel;G. Rudie;Yuguang Chen;Rachel L. Theios
Lyα emission is widely used to detect and confirm high-redshift galaxies and characterize the evolution of the intergalactic medium (IGM). However, many galaxies do not display Lyα emission in typical spectroscopic observations, and intrinsic Lyα emitters represent a potentially biased set of high-redshift galaxies. In this work, we analyze a set of 703 galaxies at 2 ≲ z ≲ 3 with both Lyα spectroscopy and measurements of other rest-frame ultraviolet and optical properties in order to develop an empirical model for Lyα emission from galaxies and understand how the probability of Lyα emission depends on other observables. We consider several empirical proxies for the efficiency of Lyα photon production, as well as the subsequent escape of these photons through their local interstellar medium. We find that the equivalent width of metal-line absorption and the O3 ratio of rest-frame optical nebular lines are advantageous empirical proxies for Lyα escape and production, respectively. We develop a new quantity, , that combines these two properties into a single predictor of net Lyα emission, which we find describes ∼90% of the observed variance in Lyα equivalent width when accounting for our observational uncertainties. We also construct conditional probability distributions demonstrating that galaxy selection based on measurements of galaxy properties yield samples of galaxies with widely varying probabilities of net Lyα emission. The application of the empirical models and probability distributions described here may be used to infer the selection biases of current galaxy surveys and evaluate the significance of high-redshift Lyα (non)detections in studies of reionization and the IGM.
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DOI:
10.1088/0004-637x/782/1/6
发表时间:
2013-08
期刊:
The Astrophysical Journal
影响因子:
--
作者:
M. Hayes;M. Hayes;M. Hayes;G. Östlin;F. Duval;A. Sandberg;L. Guaita;J. Melinder;A. Adamo
通讯作者:
M. Hayes;M. Hayes;M. Hayes;G. Östlin;F. Duval;A. Sandberg;L. Guaita;J. Melinder;A. Adamo
DOI:
10.3847/1538-4357/ab1de7
发表时间:
2019-01
期刊:
The Astrophysical Journal
影响因子:
--
作者:
A. Hoag;M. Bradavc;K. Huang;C. Mason;T. Treu;K. Schmidt;M. Trenti;V. Strait;B. Lemaux;E. Finney;Maia Paddock
通讯作者:
A. Hoag;M. Bradavc;K. Huang;C. Mason;T. Treu;K. Schmidt;M. Trenti;V. Strait;B. Lemaux;E. Finney;Maia Paddock
DOI:
10.1088/0004-637x/723/1/104
发表时间:
2010
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Atek H
通讯作者:
Atek H
DOI:
10.1088/0004-637x/797/1/11
发表时间:
2014-09
期刊:
The Astrophysical Journal
影响因子:
--
作者:
G. Östlin;M. Hayes;F. Duval;A. Sandberg;T. Rivera-Thorsen;T. Marquart;T. Marquart;I. Orlitová;I. Orlitová;A. Adamo;J. Melinder;L. Guaita;H. Atek;J. Cannon;P. Gruyters;E. C. Herenz;D. Kunth;P. Laursen;J. Mas-Hesse;G. Micheva;G. Micheva;H. Otí-Floranes;S. Pardy;S. Pardy;M. Roth;D. Schaerer;A. Verhamme
通讯作者:
G. Östlin;M. Hayes;F. Duval;A. Sandberg;T. Rivera-Thorsen;T. Marquart;T. Marquart;I. Orlitová;I. Orlitová;A. Adamo;J. Melinder;L. Guaita;H. Atek;J. Cannon;P. Gruyters;E. C. Herenz;D. Kunth;P. Laursen;J. Mas-Hesse;G. Micheva;G. Micheva;H. Otí-Floranes;S. Pardy;S. Pardy;M. Roth;D. Schaerer;A. Verhamme