# A 1.4 deg2 blind survey for C II], C III] and C IV at z ∼ 0.7–1.5:II. Luminosity functions and cosmic average line ratios

Stroe, Andra and Sobral, David and Matthee, Jorryt and Calhau, João and Oteo, Ivan (2017) A 1.4 deg2 blind survey for C II], C III] and C IV at z ∼ 0.7–1.5:II. Luminosity functions and cosmic average line ratios. Monthly Notices of the Royal Astronomical Society, 471 (3). pp. 2575-2586. ISSN 0035-8711

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## Abstract

Recently, the CIII] and CIV emission lines have been observed in galaxies in the early Universe ($z>5$), providing new ways to measure their redshift and study their stellar populations and AGN. We explore the first blind CII], CIII] and CIV survey ($z\sim0.68, 1.05, 1.53$, respectively) presented in Stroe et al. (2017). We derive luminosity functions (LF) and study properties of CII], CIII] and CIV line emitters through comparisons to the LFs of H$\alpha$ and Ly$\alpha$ emitters, UV selected star forming (SF) galaxies and quasars at similar redshifts. The CII] LF at $z\sim0.68$ is equally well described by a Schechter or a power-law LF, characteristic of a mixture of SF and AGN activity. The CIII] LF ($z\sim1.05$) is consistent to a scaled down version of the Schechter H$\alpha$ and Ly$\alpha$ LF at their redshift, indicating a SF origin. In stark contrast, the CIV LF at $z\sim1.53$ is well fit by a power-law, quasar-like LF. We find that the brightest UV sources (\$M_{UV}

Item Type:
Journal Article
Journal or Publication Title:
Monthly Notices of the Royal Astronomical Society
This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The definitive publisher-authenticated version Andra Stroe, David Sobral, Jorryt Matthee, João Calhau, Ivan Oteo; A 1.4 deg2 blind survey for C II], C III] and C IV at z ∼ 0.7–1.5 – II. Luminosity functions and cosmic average line ratios, Monthly Notices of the Royal Astronomical Society, Volume 471, Issue 3, 1 November 2017, Pages 2575–2586, https://doi.org/10.1093/mnras/stx1713 is available online at: https://academic.oup.com/mnras/article/471/3/2575/3950256/A-14-deg2-blind-survey-for-C-II-C-III-and-C-IV-at
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1900/1912
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ID Code:
86988
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Deposited On:
07 Jul 2017 08:36
Refereed?:
Yes
Published?:
Published