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GOODS-ALMA: 1.1 mm galaxy survey - I. Source catalog and optically dark galaxies

Franco, M. and Chary, R. (2018) GOODS-ALMA: 1.1 mm galaxy survey - I. Source catalog and optically dark galaxies. Astronomy and Astrophysics, 620 . Art. No. A152. ISSN 0004-6361.

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Aims. We present a 69 arcmin^2 ALMA survey at 1.1 mm, GOODS-ALMA, matching the deepest HST-WFC3 H-band part of the GOODS-South field. Methods. We tapered the 0″24 original image with a homogeneous and circular synthesized beam of 0″60 to reduce the number of independent beams – thus reducing the number of purely statistical spurious detections – and optimize the sensitivity to point sources. We extracted a catalog of galaxies purely selected by ALMA and identified sources with and without HST counterparts down to a 5σ limiting depth of H = 28.2 AB (HST/WFC3 F160W). Results. ALMA detects 20 sources brighter than 0.7 mJy at 1.1 mm in the 0″60 tapered mosaic (rms sensitivity σ ≃ 0.18 mJy beam^(−1)) with a purity greater than 80%. Among these detections, we identify three sources with no HST nor Spitzer-IRAC counterpart, consistent with the expected number of spurious galaxies from the analysis of the inverted image; their definitive status will require additional investigation. We detect additional three sources with HST counterparts either at high significance in the higher resolution map, or with different detection-algorithm parameters ensuring a purity greater than 80%. Hence we identify in total 20 robust detections. Conclusions. Our wide contiguous survey allows us to push further in redshift the blind detection of massive galaxies with ALMA with a median redshift of z = 2.92 and a median stellar mass of M⋆ = 1.1 × 10^(11) M_⊙. Our sample includes 20% HST-dark galaxies (4 out of 20), all detected in the mid-infrared with Spitzer-IRAC. The near-infrared based photometric redshifts of two of them (z ∼ 4.3 and 4.8) suggest that these sources have redshifts z >  4. At least 40% of the ALMA sources host an X-ray AGN, compared to ∼14% for other galaxies of similar mass and redshift. The wide area of our ALMA survey provides lower values at the bright end of number counts than single-dish telescopes affected by confusion.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Franco, M.0000-0002-3560-8599
Chary, R.0000-0001-7583-0621
Alternate Title:GOODS-ALMA: 1.1 mm galaxy survey - I. Source catalogue and optically dark galaxies
Additional Information:© ESO 2018. Received 1 March 2018 / Accepted 30 July 2018. We wish to thank Ivo Labbé for sharing with us the IRAC/GREATS images and Bahram Mobasher for sharing the spectroscopic redshift of AGS4 with us. This paper makes use of the following ALMA data: ADS/JAO.ALMA#2015.1.00543.S. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada), MOST 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. RD and NN gratefully acknowledge the support provided by the BASAL Center for Astrophysics and Associated Technologies (CATA) through grant PFB-06 Etapa II. Support for BM was provided by the DFG priority program 1573 “The physics of the interstellar medium”. DMA thanks the Science and Technology Facilities Council (STFC) for support from grant ST/L00075X/1. WR is supported by JSPS KAKENHI Grant Number JP15K17604, Thailand Research Fund/Office of the Higher Education Commission Grant Number MRG6080294, and Chulalongkorn University’s CUniverse. NN acknowledges funding from Fondecyt 1171506.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Basal-CATAPFB-06 Etapa II
Deutsche Forschungsgemeinschaft (DFG)1573
Science and Technology Facilities Council (STFC)ST/L00075X/1
Japan Society for the Promotion of Science (JSPS)JP15K17604
Thailand Research FundMRG6080294
Chulalongkorn UniversityUNSPECIFIED
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)1171506
Subject Keywords:galaxies: high-redshift / galaxies: evolution / galaxies: star formation / galaxies: active / galaxies: photometry / submillimeter: galaxies
Record Number:CaltechAUTHORS:20190102-155139878
Persistent URL:
Official Citation:GOODS-ALMA: 1.1 mm galaxy survey - I. Source catalog and optically dark galaxies M. Franco, D. Elbaz, M. Béthermin, B. Magnelli, C. Schreiber, L. Ciesla, M. Dickinson, N. Nagar, J. Silverman, E. Daddi, D. M. Alexander, T. Wang, M. Pannella, E. Le Floc’h, A. Pope, M. Giavalisco, A. J. Maury, F. Bournaud, R. Chary, R. Demarco, H. Ferguson, S. L. Finkelstein, H. Inami, D. Iono, S. Juneau, G. Lagache, R. Leiton, L. Lin, G. Magdis, H. Messias, K. Motohara, J. Mullaney, K. Okumura, C. Papovich, J. Pforr, W. Rujopakarn, M. Sargent, X. Shu and L. Zhou A&A, 620 (2018) A152 DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:92018
Deposited By: George Porter
Deposited On:03 Jan 2019 19:56
Last Modified:03 Oct 2019 20:40

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