A Ly{alpha} GALAXY AT REDSHIFT z = 6.944 IN THE COSMOS FIELD

Rhoads, James E; Hibon, Pascale; Malhotra, Sangeeta; Cooper, Michael; Weiner, Benjamin

doi:10.1088/2041-8205/752/2/L28

Title: A Ly{alpha} GALAXY AT REDSHIFT z = 6.944 IN THE COSMOS FIELD

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Abstract

Ly{alpha} emitting galaxies can be used to study cosmological reionization, because a neutral intergalactic medium (IGM) scatters Ly{alpha} photons into diffuse halos whose surface brightness falls below typical survey detection limits. Here, we present the Ly{alpha} emitting galaxy LAE J095950.99+021219.1, identified at redshift z = 6.944 in the COSMOS field using narrowband imaging and follow-up spectroscopy with the IMACS instrument on the Magellan I Baade telescope. With a single object spectroscopically confirmed so far, our survey remains consistent with a wide range of IGM neutral fraction at z Almost-Equal-To 7, but further observations are planned and will help clarify the situation. Meantime, the object we present here is only the third Ly{alpha}-selected galaxy to be spectroscopically confirmed at z {approx}> 7, and is {approx}2-3 times fainter than the previously confirmed z Almost-Equal-To 7 Ly{alpha} galaxies.

Authors:

Rhoads, James E; Hibon, Pascale; Malhotra, Sangeeta ^[1]; Cooper, Michael ^[2]; Weiner, Benjamin ^[3]

School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287 (United States)
Center for Galaxy Evolution, Department of Physics and Astronomy, University of California, Irvine, 4129 Frederick Reines Hall, Irvine, CA 92697 (United States)
Steward Observatory, University of Arizona, AZ (United States)

Publication Date:: Wed Jun 20 00:00:00 EDT 2012

OSTI Identifier:: 22047739

Resource Type:: Journal Article

Journal Name:: Astrophysical Journal Letters

Additional Journal Information:: Journal Volume: 752; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2041-8205

Country of Publication:: United States

Language:: English

Subject:: 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTRONOMY; ASTROPHYSICS; BRIGHTNESS; COSMIC PHOTONS; COSMOLOGY; EMISSION SPECTROSCOPY; GALAXIES; INTERGALACTIC SPACE; LYMAN LINES; RED SHIFT; SENSITIVITY; SPECTROSCOPY; STARS; SURFACES; TELESCOPES; UNIVERSE

Citation Formats


                    Rhoads, James E, Hibon, Pascale, Malhotra, Sangeeta, Cooper, Michael, and Weiner, Benjamin. A Ly{alpha} GALAXY AT REDSHIFT z = 6.944 IN THE COSMOS FIELD.  United States: N. p., 2012. 
        Web.  doi:10.1088/2041-8205/752/2/L28.

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                    Rhoads, James E, Hibon, Pascale, Malhotra, Sangeeta, Cooper, Michael, & Weiner, Benjamin. A Ly{alpha} GALAXY AT REDSHIFT z = 6.944 IN THE COSMOS FIELD.  United States.  https://doi.org/10.1088/2041-8205/752/2/L28

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                    Rhoads, James E, Hibon, Pascale, Malhotra, Sangeeta, Cooper, Michael, and Weiner, Benjamin. 2012.  
        "A Ly{alpha} GALAXY AT REDSHIFT z = 6.944 IN THE COSMOS FIELD".  United States.  https://doi.org/10.1088/2041-8205/752/2/L28.

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@article{osti_22047739,

  title        = {A Ly{alpha} GALAXY AT REDSHIFT z = 6.944 IN THE COSMOS FIELD},

  author       = {Rhoads, James E and Hibon, Pascale and Malhotra, Sangeeta and Cooper, Michael and Weiner, Benjamin},

  abstractNote = {Ly{alpha} emitting galaxies can be used to study cosmological reionization, because a neutral intergalactic medium (IGM) scatters Ly{alpha} photons into diffuse halos whose surface brightness falls below typical survey detection limits. Here, we present the Ly{alpha} emitting galaxy LAE J095950.99+021219.1, identified at redshift z = 6.944 in the COSMOS field using narrowband imaging and follow-up spectroscopy with the IMACS instrument on the Magellan I Baade telescope. With a single object spectroscopically confirmed so far, our survey remains consistent with a wide range of IGM neutral fraction at z Almost-Equal-To 7, but further observations are planned and will help clarify the situation. Meantime, the object we present here is only the third Ly{alpha}-selected galaxy to be spectroscopically confirmed at z {approx}> 7, and is {approx}2-3 times fainter than the previously confirmed z Almost-Equal-To 7 Ly{alpha} galaxies.},

  doi          = {10.1088/2041-8205/752/2/L28},

  url          = {https://www.osti.gov/biblio/22047739},
  journal      = {Astrophysical Journal Letters},

  issn         = {2041-8205},

  number       = 2,

  volume       = 752,

  place        = {United States},

  year         = {Wed Jun 20 00:00:00 EDT 2012},

  month        = {Wed Jun 20 00:00:00 EDT 2012}

}

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