Jorge González-López
The ALMA Spectroscopic Survey in the HUDF: Deep 1.2 mm Continuum Number Counts
González-López, Jorge; Novak, Mladen; Decarli, Roberto; Walter, Fabian; Aravena, Manuel; Carilli, Chris; Boogaard, Leindert; Popping, Gergö; Weiss, Axel; Assef, Roberto J.; Bauer, Franz Erik; Bouwens, Rychard; Cortes, Paulo C.; Cox, Pierre; Daddi, Emanuele; Cunha, Elisabete da; Díaz-Santos, Tanio; Ivison, Rob; Magnelli, Benjamin; Riechers, Dominik; Smail, Ian; Werf, Paul van der; Wagg, Jeff
Authors
Mladen Novak
Roberto Decarli
Fabian Walter
Manuel Aravena
Chris Carilli
Leindert Boogaard
Gergö Popping
Axel Weiss
Roberto J. Assef
Franz Erik Bauer
Rychard Bouwens
Paulo C. Cortes
Pierre Cox
Emanuele Daddi
Elisabete da Cunha
Tanio Díaz-Santos
Rob Ivison
Benjamin Magnelli
Dominik Riechers
Professor Ian Smail ian.smail@durham.ac.uk
Emeritus Professor
Paul van der Werf
Jeff Wagg
Abstract
We present the results from the 1.2 mm continuum image obtained as part of the Atacama Large Millimeter/ submillimeter Array Spectroscopic Survey in the Hubble Ultra Deep Field. The 1.2 mm continuum image has a size of 2.9 (4.2) arcmin2 within a primary beam response of 50% (10%) and an rms value of m - 9.3 Jy beam 1. We detect 35 sources at high significance (Fidelity 0.5); 32 have well-characterized near-infrared Hubble Space Telescope counterparts. We estimate the 1.2 mm number counts to flux levels of <30 Jy m in two different ways: we first use the detected sources to constrain the number counts and find a significant flattening of the counts below Sν ∼ 0.1 mJy. In a second approach, we constrain the number counts using a probability of deflection statistics (P(D)) analysis. For this latter approach, we describe new methods to accurately measure the noise in interferometric imaging (employing jackknifing in the cube and in the visibility plane). This independent measurement confirms the flattening of the number counts. Our analysis of the differential number counts shows that we are detecting ∼93% (∼100% if we include the lower fidelity detections) of the total continuum dust emission associated with galaxies in the Hubble Ultra Deep Field. The ancillary data allow us to study the dependence of the 1.2 mm number counts on redshift (z = 0−4), galaxy dust mass (M M dust = 10 10 – 7 9 ), stellar mass (M M = 10 10 – 9 12* ), and star formation rate ( = - M - SFR 1 1000 yr 1). In an accompanying paper we show that the number counts are crucial to constrain galaxy evolution models and the understanding of star-forming galaxies at high redshift.
Citation
González-López, J., Novak, M., Decarli, R., Walter, F., Aravena, M., Carilli, C., …Wagg, J. (2020). The ALMA Spectroscopic Survey in the HUDF: Deep 1.2 mm Continuum Number Counts. Astrophysical Journal, 897(1), Article 897. https://doi.org/10.3847/1538-4357/ab765b
Journal Article Type | Article |
---|---|
Acceptance Date | Feb 11, 2020 |
Online Publication Date | Jul 6, 2020 |
Publication Date | 2020-07 |
Deposit Date | Jul 29, 2020 |
Publicly Available Date | Jul 29, 2020 |
Journal | Astrophysical Journal |
Print ISSN | 0004-637X |
Publisher | American Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 897 |
Issue | 1 |
Article Number | 897 |
DOI | https://doi.org/10.3847/1538-4357/ab765b |
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Copyright Statement
© 2020. The American Astronomical Society. All rights reserved.
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