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GOODS-ALMA 2.0: Source catalog, number counts, and prevailing compact sizes in 1.1 mm galaxies

Gómez-Guijarro, C. and Elbaz, D. and Xiao, M. and Béthermin, M. and Franco, M. and Magnelli, B. and Daddi, E. and Dickinson, M. and Demarco, R. and Inami, H. and Rujopakarn, W. and Magdis, G. E. and Shu, X. and Chary, R. and Zhou, L. and Alexander, D. M. and Bournaud, F. and Ciesla, L. and Ferguson, H. C. and Finkelstein, S. L. and Giavalisco, M. and Iono, D. and Juneau, S. and Kartaltepe, J. S. and Lagache, G. and Le Floc'h, E. and Leiton, R. and Lin, L. and Motohara, K. and Mullaney, J. and Okumura, K. and Pannella, M. and Papovich, C. and Pope, A. and Sargent, M. T. and Silverman, J. D. and Treister, E. and Wang, T. (2022) GOODS-ALMA 2.0: Source catalog, number counts, and prevailing compact sizes in 1.1 mm galaxies. Astronomy and Astrophysics, 658 . Art. No. A43. ISSN 0004-6361. doi:10.1051/0004-6361/202141615.

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Submillimeter/millimeter observations of dusty star-forming galaxies with the Atacama Large Millimeter/submillimeter Array (ALMA) have shown that dust continuum emission generally occurs in compact regions smaller than the stellar distribution. However, it remains to be understood how systematic these findings are. Studies often lack homogeneity in the sample selection, target discontinuous areas with inhomogeneous sensitivities, and suffer from modest uv coverage coming from single array configurations. GOODS-ALMA is a 1.1 mm galaxy survey over a continuous area of 72.42 arcmin² at a homogeneous sensitivity. In this version 2.0, we present a new low resolution dataset and its combination with the previous high resolution dataset from the survey, improving the uv coverage and sensitivity reaching an average of σ = 68.4 μJy beam⁻¹. A total of 88 galaxies are detected in a blind search (compared to 35 in the high resolution dataset alone), 50% at S/N^(peak) ≥ 5 and 50% at 3.5 ≤ S/N^(peak) ≤ 5 aided by priors. Among them, 13 out of the 88 are optically dark or faint sources (H- or K-band dropouts). The sample dust continuum sizes at 1.1 mm are generally compact, with a median effective radius of Rₑ = 0.″10 ± 0.″05 (a physical size of Re = 0.73 ± 0.29 kpc at the redshift of each source). Dust continuum sizes evolve with redshift and stellar mass resembling the trends of the stellar sizes measured at optical wavelengths, albeit a lower normalization compared to those of late-type galaxies. We conclude that for sources with flux densities S_(1.1 mm) >  1 mJy, compact dust continuum emission at 1.1 mm prevails, and sizes as extended as typical star-forming stellar disks are rare. The S_(1.1 mm) <  1 mJy sources appear slightly more extended at 1.1 mm, although they are still generally compact below the sizes of typical star-forming stellar disks.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Gómez-Guijarro, C.0000-0002-4085-9165
Elbaz, D.0000-0002-7631-647X
Xiao, M.0000-0003-1207-5344
Béthermin, M.0000-0002-3915-2015
Franco, M.0000-0002-3560-8599
Magnelli, B.0000-0002-6777-6490
Daddi, E.0000-0002-3331-9590
Dickinson, M.0000-0001-5414-5131
Demarco, R.0000-0003-3921-2177
Inami, H.0000-0003-4268-0393
Rujopakarn, W.0000-0002-0303-499X
Magdis, G. E.0000-0002-4872-2294
Shu, X.0000-0002-7020-4290
Chary, R.0000-0001-7583-0621
Zhou, L.0000-0003-1687-9665
Alexander, D. M.0000-0002-5896-6313
Bournaud, F.0000-0002-5743-0250
Ciesla, L.0000-0003-0541-2891
Ferguson, H. C.0000-0001-7113-2738
Finkelstein, S. L.0000-0001-8519-1130
Giavalisco, M.0000-0002-7831-8751
Iono, D.0000-0002-2364-0823
Juneau, S.0000-0002-0000-2394
Kartaltepe, J. S.0000-0001-9187-3605
Lagache, G.0000-0003-1492-2519
Motohara, K.0000-0002-0724-9146
Mullaney, J.0000-0002-3126-6712
Okumura, K.0000-0001-9033-0334
Pannella, M.0000-0003-3738-3976
Papovich, C.0000-0001-7503-8482
Pope, A.0000-0001-8592-2706
Sargent, M. T.0000-0003-1033-9684
Silverman, J. D.0000-0002-0000-6977
Treister, E.0000-0001-7568-6412
Wang, T.0000-0002-2504-2421
Additional Information:© C. Gómez-Guijarro et al. 2022. Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Received 23 June 2021 / Accepted 16 November 2021. We thank G. Pöpping, C. del P. Lagos, and J. A. Zavala for providing the predicted number counts from their models plotted in Fig. 11. M.F. acknowledges the support from STFC (grant number ST/R000905/1). G.E.M. acknowledges the Villum Fonden research grant 13160 ‘Gas to stars, stars to dust: tracing star formation across cosmic time’ and the Cosmic Dawn Center of Excellence funded by the Danish National Research Foundation under the grant No. 140. H.I. acknowledges support from JSPS KAKENHI Grant Number JP19K23462 and JP21H01129. M.T.S. acknowledges support from a Scientific Exchanges visitor fellowship (IZSEZO_202357) from the Swiss National Science Foundation. This paper makes use of the following ALMA data: ADS/JAO.ALMA#2015.1.00543.S and ADS/JAO.ALMA#2017.1.00755.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. We are grateful to the anonymous referee, whose comments have been very useful to improving our work.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Science and Technology Facilities Council (STFC)ST/R000905/1
Villum Foundation13160
Danish National Research Foundation140
Japan Society for the Promotion of Science (JSPS)JP19K23462
Japan Society for the Promotion of Science (JSPS)JP21H01129
Swiss National Science Foundation (SNSF)IZSEZO_202357
Subject Keywords:galaxies: evolution / galaxies: high-redshift / galaxies: photometry / galaxies: star formation / galaxies: structure / submillimeter: galaxies
Record Number:CaltechAUTHORS:20220204-679843000
Persistent URL:
Official Citation:GOODS-ALMA 2.0: Source catalog, number counts, and prevailing compact sizes in 1.1 mm galaxies C. Gómez-Guijarro, D. Elbaz, M. Xiao, M. Béthermin, M. Franco, B. Magnelli, E. Daddi, M. Dickinson, R. Demarco, H. Inami, W. Rujopakarn, G. E. Magdis, X. Shu, R. Chary, L. Zhou, D. M. Alexander, F. Bournaud, L. Ciesla, H. C. Ferguson, S. L. Finkelstein, M. Giavalisco, D. Iono, S. Juneau, J. S. Kartaltepe, G. Lagache, E. Le Floc’h, R. Leiton, L. Lin, K. Motohara, J. Mullaney, K. Okumura, M. Pannella, C. Papovich, A. Pope, M. T. Sargent, J. D. Silverman, E. Treister and T. Wang A&A, 658 (2022) A43 DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:113289
Deposited By: George Porter
Deposited On:07 Feb 2022 20:37
Last Modified:07 Feb 2022 20:37

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