The ALPINE-ALMA [CII] survey: Data processing, catalogs, and statistical source properties

Astronomy and Astrophysics, vol. 643, pp. A2

Abstract

The Atacama Large Millimeter Array (ALMA) Large Program to INvestigate [CII] at Early times (ALPINE) targets the [CII] 158 μ m line and the far-infrared continuum in 118 spectroscopically confirmed star-forming galaxies between z = 4.4 and z = 5.9. It represents the first large [CII] statistical sample built in this redshift range. We present details regarding the data processing and the construction of the catalogs. We detected 23 of our targets in the continuum. To derive accurate infrared luminosities and obscured star formation rates (SFRs), we measured the conversion factor from the ALMA 158 μ m rest-frame dust continuum luminosity to the total infrared luminosity ( L IR ) after constraining the dust spectral energy distribution by stacking a photometric sample similar to ALPINE in ancillary single-dish far-infrared data. We found that our continuum detections have a median L IR of 4.4 × 10 11 L ⊙ . We also detected 57 additional continuum sources in our ALMA pointings. They are at a lower redshift than the ALPINE targets, with a mean photometric redshift of 2.5 ± 0.2. We measured the 850 μ m number counts between 0.35 and 3.5 mJy, thus improving the current interferometric constraints in this flux density range. We found a slope break in the number counts around 3 mJy with a shallower slope below this value. More than 40% of the cosmic infrared background is emitted by sources brighter than 0.35 mJy. Finally, we detected the [CII] line in 75 of our targets. Their median [CII] luminosity is 4.8 × 10 8 L ⊙ and their median full width at half maximum is 252 km s −1 . After measuring the mean obscured SFR in various [CII] luminosity bins by stacking ALPINE continuum data, we find a good agreement between our data and the local and predicted SFR– L [CII] relations.

Authors 13

1. M. Ginolfi

   University of Geneva

   Affiliation as printed

   Département d’Astronomie, Université de Genève, 51 Ch. des Maillettes, 1290 Versoix, Switzerland

2. Andreas L. Faisst

   California Institute of Technology · Infrared Processing and Analysis Center

   Affiliation as printed

   IPAC, M/C 314-6, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USA

3. D. Schaerer

   University of Geneva · Centre National de la Recherche Scientifique · Université Toulouse III - Paul Sabatier · Institut de Recherche en Astrophysique et Planétologie · Université de Toulouse

   Affiliation as printed

   Département d’Astronomie, Université de Genève, 51 Ch. des Maillettes, 1290 Versoix, Switzerland

   Institut de Recherche en Astrophysique et Planétologie – IRAP, CNRS, Université de Toulouse, UPS-OMP, 14, Avenue E. Belin, 31400 Toulouse, France

4. R. Amorín

   University of La Serena

   Affiliation as printed

   Departamento de Astronomía, Universidad de La Serena, Av. Juan Cisternas 1200 Norte, La Serena, Chile

   Instituto de Investigación Multidisciplinar en Ciencia y Tecnología, Universidad de La Serena, Raúl Bitrán 1305, La Serena, Chile

5. S. Bardelli

   Osservatorio di Astrofisica e Scienza dello Spazio

   Affiliation as printed

   INAF – Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, Via Gobetti 93/3, 40129 Bologna, Italy

6. Médéric Boquien

   Universidad de Antofagasta

   Affiliation as printed

   Centro de Astronomía (CITEVA), Universidad de Antofagasta, Avenida Angamos 601, Antofagasta, Chile

7. Miroslava Dessauges-Zavadsky

   University of Geneva

   Affiliation as printed

   Département d’Astronomie, Université de Genève, 51 Ch. des Maillettes, 1290 Versoix, Switzerland

8. Nimish P. Hathi

   Space Telescope Science Institute

   Affiliation as printed

   Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA

9. Anton M. Koekemoer

   Space Telescope Science Institute

   Affiliation as printed

   Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA

10. Pascal A. Oesch

    University of Geneva · University of Copenhagen

    Affiliation as printed

    Département d’Astronomie, Université de Genève, 51 Ch. des Maillettes, 1290 Versoix, Switzerland

    The Cosmic Dawn Center (DAWN), University of Copenhagen, Vibenshuset, Lyngbyvej 2, 2100 Copenhagen, Denmark

11. Dominik A. Riechers

    Cornell University · Max Planck Institute for Astronomy

    Affiliation as printed

    Department of Astronomy, Cornell University, Space Sciences Building, Ithaca, NY 14853, USA

    Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany

12. Sune Toft

    University of Copenhagen

    Affiliation as printed

    Niels Bohr Institute, University of Copenhagen, Lyngbyvej 2, 2100 Copenhagen, Denmark

    The Cosmic Dawn Center (DAWN), University of Copenhagen, Vibenshuset, Lyngbyvej 2, 2100 Copenhagen, Denmark

13. Daniela Vergani

    Osservatorio di Astrofisica e Scienza dello Spazio

    Affiliation as printed

    INAF – Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, Via Gobetti 93/3, 40129 Bologna, Italy