z ∼ 1 Lyα emitters. I. The luminosity function , , ,

Wold, Isak G. B.; Barger, Amy J.

doi:10.1088/0004-637X/783/2/119

Title: z ∼ 1 Lyα emitters. I. The luminosity function , , ,

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Abstract

We construct a flux-limited sample of 135 candidate z ∼ 1 Lyα emitters (LAEs) from Galaxy Evolution Explorer (GALEX) grism data using a new data cube search method. These LAEs have luminosities comparable to those at high redshifts and lie within a 7 Gyr gap present in existing LAE samples. We use archival and newly obtained optical spectra to verify the UV redshifts of these LAEs. We use the combination of the GALEX UV spectra, optical spectra, and X-ray imaging data to estimate the active galactic nucleus (AGN) fraction and its dependence on Lyα luminosity. We remove the AGNs and compute the luminosity function (LF) from 60 z ∼ 1 LAE galaxies. We find that the best-fit LF implies a luminosity density increase by a factor of ∼1.5 from z ∼ 0.3 to z ∼ 1 and ∼20 from z ∼ 1 to z ∼ 2. We find a z ∼ 1 volumetric Lyα escape fraction of 0.7% ± 0.4%.

Authors:

Wold, Isak G. B.; Barger, Amy J. ^[1]

Department of Astronomy, University of Wisconsin-Madison, 475 North Charter Street, Madison, WI 53706 (United States)

Publication Date:: Mon Mar 10 00:00:00 EDT 2014

OSTI Identifier:: 22351579

Resource Type:: Journal Article

Journal Name:: Astrophysical Journal

Additional Journal Information:: Journal Volume: 783; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X

Country of Publication:: United States

Language:: English

Subject:: 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COMPARATIVE EVALUATIONS; COSMOLOGY; DENSITY; DISTANCE; EVOLUTION; GALAXIES; GALAXY NUCLEI; LUMINOSITY; RED SHIFT; ULTRAVIOLET SPECTRA; X RADIATION

Citation Formats


                    Wold, Isak G. B., Barger, Amy J., and Cowie, Lennox L., E-mail: wold@astro.wisc.edu, E-mail: barger@astro.wisc.edu. z ∼ 1 Lyα emitters. I. The luminosity function , , ,.  United States: N. p., 2014. 
        Web.  doi:10.1088/0004-637X/783/2/119.

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                    Wold, Isak G. B., Barger, Amy J., & Cowie, Lennox L., E-mail: wold@astro.wisc.edu, E-mail: barger@astro.wisc.edu. z ∼ 1 Lyα emitters. I. The luminosity function , , ,.  United States.  https://doi.org/10.1088/0004-637X/783/2/119

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                    Wold, Isak G. B., Barger, Amy J., and Cowie, Lennox L., E-mail: wold@astro.wisc.edu, E-mail: barger@astro.wisc.edu. 2014.  
        "z ∼ 1 Lyα emitters. I. The luminosity function , , ,".  United States.  https://doi.org/10.1088/0004-637X/783/2/119.

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@article{osti_22351579,

  title        = {z ∼ 1 Lyα emitters. I. The luminosity function , , ,},

  author       = {Wold, Isak G. B. and Barger, Amy J. and Cowie, Lennox L., E-mail: wold@astro.wisc.edu, E-mail: barger@astro.wisc.edu},

  abstractNote = {We construct a flux-limited sample of 135 candidate z ∼ 1 Lyα emitters (LAEs) from Galaxy Evolution Explorer (GALEX) grism data using a new data cube search method. These LAEs have luminosities comparable to those at high redshifts and lie within a 7 Gyr gap present in existing LAE samples. We use archival and newly obtained optical spectra to verify the UV redshifts of these LAEs. We use the combination of the GALEX UV spectra, optical spectra, and X-ray imaging data to estimate the active galactic nucleus (AGN) fraction and its dependence on Lyα luminosity. We remove the AGNs and compute the luminosity function (LF) from 60 z ∼ 1 LAE galaxies. We find that the best-fit LF implies a luminosity density increase by a factor of ∼1.5 from z ∼ 0.3 to z ∼ 1 and ∼20 from z ∼ 1 to z ∼ 2. We find a z ∼ 1 volumetric Lyα escape fraction of 0.7% ± 0.4%.},

  doi          = {10.1088/0004-637X/783/2/119},

  url          = {https://www.osti.gov/biblio/22351579},
  journal      = {Astrophysical Journal},

  issn         = {0004-637X},

  number       = 2,

  volume       = 783,

  place        = {United States},

  year         = {Mon Mar 10 00:00:00 EDT 2014},

  month        = {Mon Mar 10 00:00:00 EDT 2014}

}

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