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THE ALMA SPECTROSCOPIC SURVEY IN THE HUBBLE ULTRA DEEP FIELD: CONTINUUM NUMBER COUNTS, RESOLVED 1.2 mm EXTRAGALACTIC BACKGROUND, AND PROPERTIES OF THE FAINTEST DUSTY STAR-FORMING GALAXIES

Aravena, M. ; Decarli, R. ; Walter, F. ; Cunha, E. Da ; Bauer, F. E. ; Carilli, C. L. ; Daddi, E. ; Elbaz, D. ; Ivison, R. J. ; Riechers, D. A. ; Smail, I. ; Swinbank, A. M. ; Weiss, A. ; Anguita, T. ; Assef, R. J. ; Bell, E. ; Bertoldi, F. ; Bacon, R. ; Bouwens, R. ; Cortes, P. ; Cox, P. ; Gónzalez-López, J. ; Hodge, J. ; Ibar, E. ; Inami, H. ; Infante, L. ; Karim, A. ; Fèvre, O. Le Le ; Magnelli, B. ; Ota, K. ; Popping, G. ; Sheth, K. ; van der Werf, P. ; Wagg, J.

The Astrophysical journal, 2016-12, Vol.833 (1), p.68 [Periódico revisado por pares]

Philadelphia: The American Astronomical Society

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Título:
THE ALMA SPECTROSCOPIC SURVEY IN THE HUBBLE ULTRA DEEP FIELD: CONTINUUM NUMBER COUNTS, RESOLVED 1.2 mm EXTRAGALACTIC BACKGROUND, AND PROPERTIES OF THE FAINTEST DUSTY STAR-FORMING GALAXIES
Autor: Aravena, M. ; Decarli, R. ; Walter, F. ; Cunha, E. Da ; Bauer, F. E. ; Carilli, C. L. ; Daddi, E. ; Elbaz, D. ; Ivison, R. J. ; Riechers, D. A. ; Smail, I. ; Swinbank, A. M. ; Weiss, A. ; Anguita, T. ; Assef, R. J. ; Bell, E. ; Bertoldi, F. ; Bacon, R. ; Bouwens, R. ; Cortes, P. ; Cox, P. ; Gónzalez-López, J. ; Hodge, J. ; Ibar, E. ; Inami, H. ; Infante, L. ; Karim, A. ; Fèvre, O. Le Le ; Magnelli, B. ; Ota, K. ; Popping, G. ; Sheth, K. ; van der Werf, P. ; Wagg, J.
Assuntos: Astrophysics ; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ; CARBON MONOXIDE ; COSMIC DUST ; Depletion ; DETECTION ; Dust emission ; EMISSION ; FLUX DENSITY ; GALACTIC EVOLUTION ; GALAXIES ; galaxies: evolution ; galaxies: ISM ; galaxies: star formation ; galaxies: statistics ; Hubble deep field ; instrumentation: interferometers ; INTERFEROMETERS ; Interstellar matter ; Interstellar medium ; MASS ; Molecular gases ; Polls & surveys ; RED SHIFT ; Sciences of the Universe ; Spacecraft recovery ; Spectroscopy ; Star & galaxy formation ; STAR EVOLUTION ; Star formation ; STARS ; Stars & galaxies ; STATISTICS ; Stellar mass ; submillimeter: galaxies
É parte de: The Astrophysical journal, 2016-12, Vol.833 (1), p.68
Notas: Galaxies and Cosmology
AAS00893
Descrição: ABSTRACT We present an analysis of a deep (1 = 13 Jy) cosmological 1.2 mm continuum map based on ASPECS, the ALMA Spectroscopic Survey in the Hubble Ultra Deep Field. In the 1 arcmin2 covered by ASPECS we detect nine sources at significance at 1.2 mm. Our ALMA-selected sample has a median redshift of , with only one galaxy detected at z > 2 within the survey area. This value is significantly lower than that found in millimeter samples selected at a higher flux density cutoff and similar frequencies. Most galaxies have specific star formation rates (SFRs) similar to that of main-sequence galaxies at the same epoch, and we find median values of stellar mass and SFRs of and yr−1, respectively. Using the dust emission as a tracer for the interstellar medium (ISM) mass, we derive depletion times that are typically longer than 300 Myr, and we find molecular gas fractions ranging from ∼0.1 to 1.0. As noted by previous studies, these values are lower than those using CO-based ISM estimates by a factor of ∼2. The 1 mm number counts (corrected for fidelity and completeness) are in agreement with previous studies that were typically restricted to brighter sources. With our individual detections only, we recover 55% 4% of the extragalactic background light (EBL) at 1.2 mm measured by the Planck satellite, and we recover 80% 7% of this EBL if we include the bright end of the number counts and additional detections from stacking. The stacked contribution is dominated by galaxies at , with stellar masses of (1-3) × 1010 M . For the first time, we are able to characterize the population of galaxies that dominate the EBL at 1.2 mm.
Editor: Philadelphia: The American Astronomical Society
Idioma: Inglês

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THE ALMA SPECTROSCOPIC SURVEY IN THE HUBBLE ULTRA DEEP FIELD: CONTINUUM NUMBER COUNTS, RESOLVED 1.2 mm EXTRAGALACTIC BACKGROUND, AND PROPERTIES OF THE FAINTEST DUSTY STAR-FORMING GALAXIES

Philadelphia: The American Astronomical Society

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