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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28632
Title: The Atacama Large Millimeter/submillimeter Array Spectroscopic Survey in the Hubble Ultra Deep Field: CO Emission Lines and 3 mm Continuum Sources
Authors: González-López, Jorge
DECARLI, ROBERTO 
Pavesi, Riccardo
Walter, Fabian
Aravena, Manuel
Carilli, Chris
Boogaard, Leindert
Popping, Gergö
Weiss, Axel
Assef, Roberto J.
Bauer, Franz Erik
Bertoldi, Frank
Bouwens, Richard
Contini, Thierry
Cortes, Paulo C.
Cox, Pierre
da Cunha, Elisabete
Daddi, Emanuele
Díaz-Santos, Tanio
Inami, Hanae
Hodge, Jacqueline
Ivison, Rob
Le Fèvre, Olivier
Magnelli, Benjamin
Oesch, Pascal
Riechers, Dominik
Rix, Hans-Walter
Smail, Ian
Swinbank, A. M.
Somerville, Rachel S.
Uzgil, Bade
van der Werf, Paul
Issue Date: 2019
Journal: THE ASTROPHYSICAL JOURNAL 
Number: 882
Issue: 2
First Page: 139
Abstract: The Atacama Large Millimeter/submillimeter Array (ALMA) SPECtroscopic Survey in the Hubble Ultra Deep Field (HUDF) is an ALMA large program that obtained a frequency scan in the 3 mm band to detect emission lines from the molecular gas in distant galaxies. Here we present our search strategy for emission lines and continuum sources in the HUDF. We compare several line search algorithms used in the literature, and critically account for the line widths of the emission line candidates when assessing significance. We identify 16 emission lines at high fidelity in our search. Comparing these sources to multiwavelength data we find that all sources have optical/infrared counterparts. Our search also recovers candidates of lower significance that can be used statistically to derive, e.g., the CO luminosity function. We apply the same detection algorithm to obtain a sample of six 3 mm continuum sources. All of these are also detected in the 1.2 mm continuum with optical/near-infrared counterparts. We use the continuum sources to compute 3 mm number counts in the sub-millijansky regime, and find them to be higher by an order of magnitude than expected for synchrotron-dominated sources. However, the number counts are consistent with those derived at shorter wavelengths (0.85-1.3 mm) once extrapolating to 3 mm with a dust emissivity index of β = 1.5, dust temperature of 35 K, and an average redshift of z = 2.5. These results represent the best constraints to date on the faint end of the 3 mm number counts.
URI: http://hdl.handle.net/20.500.12386/28632
URL: https://iopscience.iop.org/article/10.3847/1538-4357/ab3105
ISSN: 0004-637X
DOI: 10.3847/1538-4357/ab3105
Bibcode ADS: 2019ApJ...882..139G
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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