A Caltech Library Service

The ALMA Spectroscopic Survey in the HUDF: A Search for [C II] Emitters at 6 ≤ z ≤ 8

Uzgil, Bade D. and Oesch, Pascal A. and Walter, Fabian and Aravena, Manuel and Boogaard, Leindert and Carilli, Chris and Decarli, Roberto and Díaz-Santos, Tanio and Fudamoto, Yoshi and Inami, Hanae and Bouwens, Rychard and Cortes, Paulo C. and Cox, Pierre and Daddi, Emmanuele and González-López, Jorge and Labbé, Ivo and Popping, Gergö and Riechers, Dominik and Stefanon, Mauro and van der Werf, Paul and Weiss, Axel (2021) The ALMA Spectroscopic Survey in the HUDF: A Search for [C II] Emitters at 6 ≤ z ≤ 8. Astrophysical Journal, 912 (1). Art. No. 67. ISSN 1538-4357. doi:10.3847/1538-4357/abe86b.

[img] PDF - Published Version
See Usage Policy.

[img] PDF - Submitted Version
Creative Commons Attribution.


Use this Persistent URL to link to this item:


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 × 10⁸ L_⊙, 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 × 10⁸ L_⊙ (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.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Uzgil, Bade D.0000-0001-8526-3464
Oesch, Pascal A.0000-0001-5851-6649
Walter, Fabian0000-0003-4793-7880
Aravena, Manuel0000-0002-6290-3198
Boogaard, Leindert0000-0002-3952-8588
Carilli, Chris0000-0001-6647-3861
Decarli, Roberto0000-0002-2662-8803
Díaz-Santos, Tanio0000-0003-0699-6083
Fudamoto, Yoshi0000-0001-7440-8832
Inami, Hanae0000-0003-4268-0393
Bouwens, Rychard0000-0002-4989-2471
Cortes, Paulo C.0000-0002-3583-780X
Cox, Pierre0000-0003-2027-8221
Daddi, Emmanuele0000-0002-3331-9590
González-López, Jorge0000-0003-3926-1411
Labbé, Ivo0000-0002-2057-5376
Popping, Gergö0000-0003-1151-4659
Riechers, Dominik0000-0001-9585-1462
Stefanon, Mauro0000-0001-7768-5309
van der Werf, Paul0000-0001-5434-5942
Weiss, Axel0000-0003-4678-3939
Additional Information:© 2021. The American Astronomical Society. Received 2020 October 9; revised 2021 February 18; accepted 2021 February 20; published 2021 May 5. The authors thank the anonymous referee for a constructive report. We thank Takuya Hashimoto for sharing equivalent-width data for the MUSE LAEs in ASPECS. B.D.U. would like to thank Andrea Ferrara and the cosmology group at Scuola Normale Superiore, where part of this work was done, for their hospitality and useful discussions. D.R. acknowledges support from the National Science Foundation under grant Nos. AST-1614213 and AST-1910107. D.R. also acknowledges support from the Alexander von Humboldt Foundation through a Humboldt Research Fellowship for Experienced Researchers. T.D.-S. acknowledges support from the CASSACA and CONICYT fund CAS-CONICYT Call 2018. H.I. acknowledges support from JSPS KAKENHI grant No. JP19K23462. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada), 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. Facilities: ALMA data: 2016.1.00324.L - . -
Funding AgencyGrant Number
Alexander von Humboldt FoundationUNSPECIFIED
Chinese Academy of Sciences South America Center for Astronomy (CASSACA)UNSPECIFIED
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)UNSPECIFIED
Japan Society for the Promotion of Science (JSPS)JP19K23462
Subject Keywords:High-redshift galaxies; Interstellar medium
Issue or Number:1
Classification Code:Unified Astronomy Thesaurus concepts: High-redshift galaxies (734); Interstellar medium (847)
Record Number:CaltechAUTHORS:20210504-130021660
Persistent URL:
Official Citation:Bade D. Uzgil et al 2021 ApJ 912 67
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108968
Deposited By: Tony Diaz
Deposited On:05 May 2021 18:19
Last Modified:05 May 2021 21:26

Repository Staff Only: item control page