CaltechAUTHORS
Published January 10, 2017 | Version Published + Submitted
Journal Article Open

ALMA Reveals Strong [C II] Emission in a Galaxy Embedded in a Giant Lyα Blob at z = 3.1

Creators

  • 1. ROR icon The Open University of Japan
  • 2. ROR icon University of Tokyo
  • 3. ROR icon National Astronomical Observatory of Japan
  • 4. ROR icon The Graduate University for Advanced Studies, SOKENDAI
  • 5. ROR icon Durham University
  • 6. ROR icon European Southern Observatory
  • 7. ROR icon University of Edinburgh
  • 8. ROR icon California Institute of Technology
  • 9. ROR icon Dalhousie University
  • 10. ROR icon University of Hertfordshire
  • 11. ROR icon Stockholm University
  • 12. ROR icon Ehime University
  • 13. ROR icon University of Massachusetts Amherst
  • 14. ROR icon University of Hyogo
  • 15. ROR icon University of Groningen
  • 16. ROR icon University of Tsukuba

Abstract

We report the result from observations conducted with the Atacama Large Millimeter/submillimeter Array (ALMA) to detect [C ii] 158 μm fine structure line emission from galaxies embedded in one of the most spectacular Lyα blobs (LABs) at z = 3.1, SSA22-LAB1. Of three dusty star-forming galaxies previously discovered by ALMA 860 μm dust continuum survey toward SSA22-LAB1, we detected the [C ii] line from one, LAB1-ALMA3 at z = 3.0993 ± 0.0004. No line emission was detected, associated with the other ALMA continuum sources or from three rest-frame UV/optical selected z_(spec) ≃ 3.1 galaxies within the field of view. For LAB1-ALMA3, we find relatively bright [C ii] emission compared to the infrared luminosity (L_([C ii])/L_(IR) ≈ 0.01) and an extremely high [C ii] 158 μm and [N ii] 205 μm emission line ratio (L_([C ii])/L_([N ii]) > 55). The relatively strong [C ii] emission may be caused by abundant photodissociation regions and sub-solar metallicity, or by shock heating. The origin of the unusually strong [C ii] emission could be causally related to the location within the giant LAB, although the relationship between extended Lyα emission and interstellar medium conditions of associated galaxies is yet to be understand.

Additional Information

© 2017. The American Astronomical Society. Received 2016 December 2. Accepted 2016 December 27. Published 2017 January 12. We greatly appreciate the anonymous referee for a helpful report. H.U. is supported by the ALMA Japan Research Grant of NAOJ Chile Observatory, NAOJ-ALMA-0071, 0131, 140, and 0152. H.U. is supported by JSPS Grant-in-Aid for Research Activity Start-up (16H06713). H.U. is thankful for the support from JSPS KAKENHI No. 16H02166 (PI: Y. Taniguchi). Y.T. is supported by JSPS KAKENHI No. 25102073. R.J.I. acknowledges support from ERC in the form of the Advanced Investigator Programme, 321302, COSMICISM. I.R.S. acknowledges support from STFC (ST/L00075X/1). I.R.S. acknowledges support from the ERC Advanced Investigator program DUSTYGAL 321334, and a Royal Society/Wolfson Merit Award. M.H. acknowledges the support of the Swedish Research Council, Vetenskapsrådet and the Swedish National Space Board (SNSB), and is Fellow of the Knut and Alice Wallenberg Foundation. This Letter makes use of the following ALMA data: ADS/JAO.ALMA#2013.1.00159.S, ADS/JAO.ALMA#2013.1.00704.S. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada) and NSC and ASIAA (Taiwan) and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO and NAOJ. Facility: ALMA.

Attached Files

Published - Umehata_2017_ApJL_834_L16.pdf

Submitted - 1701.00043v1.pdf

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1701.00043v1.pdf

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Additional details

Identifiers

Eprint ID
73590
Resolver ID
CaltechAUTHORS:20170120-133954598

Related works

Describes
https://arxiv.org/abs/1701.00043 (URL)

Funding

National Astronomical Observatory of Japan
NAOJ-ALMA-0071
National Astronomical Observatory of Japan
NAOJ-ALMA-0131
National Astronomical Observatory of Japan
NAOJ-ALMA-140
National Astronomical Observatory of Japan
NAOJ-ALMA-0152
Japan Society for the Promotion of Science (JSPS)
16H06713
Japan Society for the Promotion of Science (JSPS)
16H02166
Japan Society for the Promotion of Science (JSPS)
25102073
European Research Council (ERC)
321302
Science and Technology Facilities Council (STFC)
ST/L00075X/1
European Research Council (ERC)
DUSTYGAL 321334
Royal Society
Swedish Research Council
Swedish National Space Board (SNSB)
Knut and Alice Wallenberg Foundation

Dates

Created
2017-01-22
Created from EPrint's datestamp field
Updated
2022-05-06
Created from EPrint's last_modified field

Caltech Custom Metadata

Caltech groups
Infrared Processing and Analysis Center (IPAC) , Astronomy Department