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Title: HUBBLE SPACE TELESCOPE SPECTROSCOPY OF BROWN DWARFS DISCOVERED WITH THE WIDE-FIELD INFRARED SURVEY EXPLORER

Abstract

We present a sample of brown dwarfs identified with the Wide-field Infrared Survey Explorer (WISE) for which we have obtained Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) near-infrared grism spectroscopy. The sample (22 in total) was observed with the G141 grism covering 1.10–1.70 μm, while 15 were also observed with the G102 grism, which covers 0.90–1.10 μm. The additional wavelength coverage provided by the G102 grism allows us to (1) search for spectroscopic features predicted to emerge at low effective temperatures (e.g.,ammonia bands) and (2) construct a smooth spectral sequence across the T/Y boundary. We find no evidence of absorption due to ammonia in the G102 spectra. Six of these brown dwarfs are new discoveries, three of which are found to have spectral types of T8 or T9. The remaining three, WISE J082507.35+280548.5 (Y0.5), WISE J120604.38+840110.6 (Y0), and WISE J235402.77+024015.0 (Y1), are the 19th, 20th, and 21st spectroscopically confirmed Y dwarfs to date. We also present HST grism spectroscopy and reevaluate the spectral types of five brown dwarfs for which spectral types have been determined previously using other instruments.

Authors:
;  [1]; ;  [2]; ;  [3];  [4];  [5];  [6];  [7]
  1. Department of Physics and Astronomy, University of Toledo, 2801 W. Bancroft St., Toledo, OH 43606 (United States)
  2. Infrared Processing and Analysis Center, MS 100-22, California Institute of Technology, Pasadena, CA 91125 (United States)
  3. Department of Physics and Astronomy, UCLA, 430 Portola Plaza, Box 951547, Los Angeles, CA 90095-1547 (United States)
  4. Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109 (United States)
  5. Department of Astronomy, University of Virginia, 530 McCormick Road, Charlottesville, VA 22904 (United States)
  6. Department of Astronomy and Astrophysics, 525 Davey Lab, The Pennsylvania State University, University Park, PA 16802 (United States)
  7. School of Physics and Astronomy, Cardiff University, Cardiff CF24 3AA (United Kingdom)
Publication Date:
OSTI Identifier:
22522449
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 804; 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; ABSORPTION SPECTROSCOPY; AMMONIA; CAMERAS; DWARF STARS; INFRARED SURVEYS; MASS; NEAR INFRARED RADIATION; SPACE; TELESCOPES

Citation Formats

Schneider, Adam C., Cushing, Michael C., Kirkpatrick, J. Davy, Gelino, Christopher R., Mace, Gregory N., Wright, Edward L., Eisenhardt, Peter R., Skrutskie, M. F., Griffith, Roger L., and Marsh, Kenneth A., E-mail: Adam.Schneider@Utoledo.edu. HUBBLE SPACE TELESCOPE SPECTROSCOPY OF BROWN DWARFS DISCOVERED WITH THE WIDE-FIELD INFRARED SURVEY EXPLORER. United States: N. p., 2015. Web. doi:10.1088/0004-637X/804/2/92.
Schneider, Adam C., Cushing, Michael C., Kirkpatrick, J. Davy, Gelino, Christopher R., Mace, Gregory N., Wright, Edward L., Eisenhardt, Peter R., Skrutskie, M. F., Griffith, Roger L., & Marsh, Kenneth A., E-mail: Adam.Schneider@Utoledo.edu. HUBBLE SPACE TELESCOPE SPECTROSCOPY OF BROWN DWARFS DISCOVERED WITH THE WIDE-FIELD INFRARED SURVEY EXPLORER. United States. doi:10.1088/0004-637X/804/2/92.
Schneider, Adam C., Cushing, Michael C., Kirkpatrick, J. Davy, Gelino, Christopher R., Mace, Gregory N., Wright, Edward L., Eisenhardt, Peter R., Skrutskie, M. F., Griffith, Roger L., and Marsh, Kenneth A., E-mail: Adam.Schneider@Utoledo.edu. Sun . "HUBBLE SPACE TELESCOPE SPECTROSCOPY OF BROWN DWARFS DISCOVERED WITH THE WIDE-FIELD INFRARED SURVEY EXPLORER". United States. doi:10.1088/0004-637X/804/2/92.
@article{osti_22522449,
title = {HUBBLE SPACE TELESCOPE SPECTROSCOPY OF BROWN DWARFS DISCOVERED WITH THE WIDE-FIELD INFRARED SURVEY EXPLORER},
author = {Schneider, Adam C. and Cushing, Michael C. and Kirkpatrick, J. Davy and Gelino, Christopher R. and Mace, Gregory N. and Wright, Edward L. and Eisenhardt, Peter R. and Skrutskie, M. F. and Griffith, Roger L. and Marsh, Kenneth A., E-mail: Adam.Schneider@Utoledo.edu},
abstractNote = {We present a sample of brown dwarfs identified with the Wide-field Infrared Survey Explorer (WISE) for which we have obtained Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) near-infrared grism spectroscopy. The sample (22 in total) was observed with the G141 grism covering 1.10–1.70 μm, while 15 were also observed with the G102 grism, which covers 0.90–1.10 μm. The additional wavelength coverage provided by the G102 grism allows us to (1) search for spectroscopic features predicted to emerge at low effective temperatures (e.g.,ammonia bands) and (2) construct a smooth spectral sequence across the T/Y boundary. We find no evidence of absorption due to ammonia in the G102 spectra. Six of these brown dwarfs are new discoveries, three of which are found to have spectral types of T8 or T9. The remaining three, WISE J082507.35+280548.5 (Y0.5), WISE J120604.38+840110.6 (Y0), and WISE J235402.77+024015.0 (Y1), are the 19th, 20th, and 21st spectroscopically confirmed Y dwarfs to date. We also present HST grism spectroscopy and reevaluate the spectral types of five brown dwarfs for which spectral types have been determined previously using other instruments.},
doi = {10.1088/0004-637X/804/2/92},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 804,
place = {United States},
year = {2015},
month = {5}
}