2020ApJ...905..147Y


Query : 2020ApJ...905..147Y

2020ApJ...905..147Y - Astrophys. J., 905, 147-147 (2020/December-3)

The ALPINE-ALMA [C II] survey: [C II] 158 µm emission line luminosity functions at z ∼ 4-6.

YAN L., SAJINA A., LOIACONO F., LAGACHE G., BETHERMIN M., FAISST A., GINOLFI M., LE FEVRE O., GRUPPIONI C., CAPAK P.L., CASSATA P., SCHAERER D., SILVERMAN J.D., BARDELLI S., DESSAUGES-ZAVADSKY M., CIMATTI A., HATHI N.P., LEMAUX B.C., IBAR E., JONES G.C., KOEKEMOER A.M., OESCH P.A., TALIA M., POZZI F., RIECHERS D.A., TASCA L.A.M., TOFT S., VALLINI L., VERGANI D., ZAMORANI G. and ZUCCA E.

Abstract (from CDS):

We present the [C II] 158 µm line luminosity functions (LFs) at z ∼ 4-6 using the ALMA observations of 118 sources, which are selected to have UV luminosity M1500Å < -20.2 and optical spectroscopic redshifts in COSMOS and ECDF-S. Of the 118 targets, 75 have significant [C II] detections and 43 are upper limits. This is by far the largest sample of [C II] detections, which allows us to set constraints on the volume density of [C II] emitters at z ∼ 4-6. But because this is a UV-selected sample, we are missing [C II]-bright but UV-faint sources, making our constraints strict lower limits. Our derived LFs are statistically consistent with the z ∼ 0 [C II] LF at 108.25-109.75L. We compare our results with the upper limits of the [C II] LF derived from serendipitous sources in the ALPINE maps. We also infer the [C II] LFs based on published far-IR and CO LFs at z ∼ 4-6. Combining our robust lower limits with these additional estimates, we set further constraints on the true number density of [C II] emitters at z ∼ 4-6. These additional LF estimates are largely above our LF at L[CII] > 109L, suggesting that UV-faint but [C II]-bright sources likely make significant contributions to the [C II] emitter volume density. When we include all the LF estimates, we find that available model predictions underestimate the number densities of [C II] emitters at z ∼ 4-6. Finally, we set a constraint on the molecular gas mass density at z ∼ 4-6, with ρmol ∼ (2-7) x 107M Mpc–3. This is broadly consistent with previous studies.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): High-redshift galaxies - Emission line galaxies - Luminosity function - Warm ionized medium - Warm neutral medium - Molecular gas

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 NAME GOODS Southern Field reg 03 32 28.0 -27 48 30           ~ 1318 1
2 NAME Extended Chandra Deep Field South reg 03 32 30.0 -27 48 20           ~ 757 0
3 COSMOS2015 873756 AGN 10 00 02.710 +02 37 40.30           ~ 16 0
4 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 2912 0

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