| Autor: |
Uzgil, Bade D., Oesch, Pascal A., Walter, Fabian, Aravena, Manuel, Boogaard, Leindert, Carilli, Chris, Decarli, Roberto, Díaz-Santos, Tanio, Fudamoto, Yoshi, Inami, Hanae, Bouwens, Rychard, Cortes, Paulo C., Cox, Pierre, Daddi, Emmanuele, González-López, Jorge, Labbe, Ivo, Popping, Gergö, Riechers, Dominik, Stefanon, Mauro, Van der Werf, Paul |
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| Zdroj: |
Astrophysical Journal; 5/1/2021, Vol. 912 Issue 1, p1-12, 12p |
| Abstrakt: |
The Atacama Large Millimeter/submillimeter Array (ALMA) Spectroscopic Survey in the Hubble Ultra Deep Field (ASPECS) Band 6 scan (212–272 GHz) covers potential [C ii ] emission in galaxies at 6 ≤ z ≤ 8 throughout a 2.9 arcmin2 area. By selecting on known Lyα emitters (LAEs) and photometric dropout galaxies in the field, we perform targeted searches down to a 5σ [C ii ] luminosity depth L[C II ] ∼ 2.0 × 108L⊙, corresponding roughly to star formation rates (SFRs) of 10–20 M⊙ yr−1 when applying a locally calibrated conversion for star-forming galaxies, yielding zero detections. While the majority of galaxies in this sample are characterized by lower SFRs, the resulting upper limits on [C ii ] luminosity in these sources are consistent with the current literature sample of targeted ALMA observations of z = 6–7 LAEs and Lyman-break galaxies (LBGs), as well as the locally calibrated relations between L[C ii ] and SFR—with the exception of a single [C ii ]-deficient, UV-luminous LBG. We also perform a blind search for [C ii ]-bright galaxies that may have been missed by optical selections, resulting in an upper limit on the cumulative number density of [C ii ] sources with L[C II ] > 2.0 × 108L⊙ (5σ) to be less than 1.8 × 10−4 Mpc−3 (90% confidence level). At this luminosity depth and volume coverage, we present an observed evolution of the [C ii ] luminosity function from z = 6–8 to z ∼ 0 by comparing the ASPECS measurement to literature results at lower redshift. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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