Constraining C iii] Emission in a Sample of Five Luminous z = 5.7 Galaxies
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Author
Ding, Jiani
Cai, Zheng

Fan, Xiaohui

P. Stark, Daniel
Bian, Fuyan

Jiang, Linhua

McGreer, Ian D.

Robertson, Brant E.

Siana, Brian

Affiliation
Univ Arizona, Steward ObservIssue Date
2017-04-04
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IOP PUBLISHING LTDCitation
Constraining C iii] Emission in a Sample of Five Luminous z = 5.7 Galaxies 2017, 838 (2):L22 The Astrophysical JournalRights
© 2017. The American Astronomical Society. All rights reserved.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
Recent observations have suggested that the C III] lambda 1907/1909 emission lines could be alternative diagnostic lines for galaxies in the reionization epoch. We use the F128N narrowband filter on the Hubble Space Telescope's (HST) Wide Field Camera 3 (WFC3) to search for C III] emission in a sample of five galaxies at z = 5.7 in the Subaru Deep Field and the Subaru/XMM-Newton Deep Field. Using the F128N narrowband imaging, together with the broadband imaging, we do not detect C III] emission for the five galaxies with JAB ranging from 24.10 to 27.00 in our sample. For the brightest galaxy J132416.13+274411.6 in our sample (z = 5.70, J(AB) = 24.10), which has a significantly higher signal to noise, we report a C III] flux of 3.34 +/- 1.81 x 10(-18) erg s(-1)cm(-2), which places a stringent 3 sigma upper limit of 5.43 x 10(-18) erg s(-1)cm(-2) on C III] flux and 6.57 angstrom on the C III] equivalent width. Using the stacked image, we put a 3 sigma upper limit on the mean C III] flux of 2.55 x 10(-18) erg s(-1) cm(-2) and a 3 sigma upper limit on the mean C III] equivalent width of 4.20 angstrom for this sample of galaxies at z = 5.70. Combined with strong C III] detection reported among high-z galaxies in the literature, our observations suggest that the equivalent widths of C III] from galaxies at z > 5.70 exhibit a wide range of distribution. Our strong limits on C III] emission could be used as a guide for future observations in the reionization epoch.ISSN
2041-8213Version
Final published versionSponsors
NASA from the Space Telescope Science Institute [HST-GO13644, NAS 5-26555]; NASA through the Hubble Fellowship [HST-HF2-51370]; Space Telescope Science Institute; National Science Foundation [AST-1410155]Additional Links
http://stacks.iop.org/2041-8205/838/i=2/a=L22?key=crossref.761cbb09df61d093c3e804ccc5f9f3e1ae974a485f413a2113503eed53cd6c53
10.3847/2041-8213/aa6482