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Using Mg II Doublet to Predict the Lyman Continuum Escape Fraction from 14 HETDEX Galaxies

Name: Using Mg II Doublet to Predict the Lyman Continuum Escape Fraction from 14 HETDEX Galaxies
Keywords: Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, Astrophysics - Astrophysics of Galaxies

descriptionPublicationkeyboard_double_arrow_right Article , Preprint 01 Jan 2023Embargo end date: 01 Jan 2023Publisher:arXiv

Authors: Salazar, Victoria; Leclercq, Floriane; Chisholm, John; Hill, Gary J.; Zeimann, Gregory R.;

doi: 10.48550/arxiv.2311.18008

arXiv: http://arxiv.org/abs/2311.18008 , 2311.18008

Using Mg II Doublet to Predict the Lyman Continuum Escape Fraction from 14 HETDEX Galaxies

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Abstract

Indirect diagnostics of Lyman continuum (LyC) escape are needed to constrain which sources reionized the universe. We used Mg II to predict the LyC escape fraction (fesc(LyC)) in 14 galaxies selected from the Hobby-Eberly Telescope Dark Energy Experiment solely based upon their Mg II properties. Using the Low Resolution Spectrograph on HET, we identified 7 and 5 possible LyC leakers depending on the method, with fesc(LyC) ranging from 3 to 80%. Interestingly, our targets display diverse [O III]/[O II] ratios (O32), with strong inferred LyC candidates showing lower O32 values than previous confirmed LyC leaker samples. Additionally, a correlation between dust and fesc(LyC) was identified. Upcoming Hubble Space Telescope/Cosmic Origins Spectrograph LyC observations of our sample will test if Mg II and dust are predictors of fesc(LyC), providing insights for future JWST studies of high-redshift galaxies.

4 pages, 1 figure. Accepted to RNAAS

Related Organizations

The University of Texas at Austin
United States

Keywords

Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, Astrophysics - Astrophysics of Galaxies

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Using Mg II Doublet to Predict the Lyman Continuum Escape Fraction from 14 HETDEX Galaxies

Using Mg II Doublet to Predict the Lyman Continuum Escape Fraction from 14 HETDEX Galaxies

1 Research products, page 1 of 1

Panacea software on GitHub