TY - JOUR
T1 - The intense starburst HDF850.1 in a galaxy overdensity at z≈5.2 in the Hubble Deep Field
AU - Walter, Fabian
AU - Decarli, Roberto
AU - Carilli, Chris
AU - Bertoldi, Frank
AU - Cox, Pierre
AU - Da Cunha, Elisabete
AU - Daddi, Emanuele
AU - Dickinson, Mark
AU - Downes, Dennis
AU - Elbaz, David
AU - Ellis, Richard
AU - Hodge, Jacqueline
AU - Neri, Roberto
AU - Riechers, Dominik A.
AU - Weiss, Axel
AU - Bell, Eric
AU - Dannerbauer, Helmut
AU - Krips, Melanie
AU - Krumholz, Mark
AU - Lentati, Lindley
AU - Maiolino, Roberto
AU - Menten, Karl
AU - Rix, Hans Walter
AU - Robertson, Brant
AU - Spinrad, Hyron
AU - Stark, Dan P.
AU - Stern, Daniel
PY - 2012/6/14
Y1 - 2012/6/14
N2 - The Hubble Deep Field provides one of the deepest multiwavelength views of the distant Universe and has led to the detection of thousands of galaxies seen throughout cosmic time. An early map of the Hubble Deep Field at a wavelength of 850micrometres, which is sensitive to dust emission powered by star formation, revealed the brightest source in the field, dubbed HDF850.1 (ref. 2). For more than a decade, and despite significant efforts, no counterpart was found at shorter wavelengths, and it was not possible to determine its redshift, size or mass. Here we report a redshift of z = 5.183 for HDF850.1, from a millimetre-wave molecular line scan. This places HDF850.1 in a galaxy overdensity at z≈5.2, corresponding to a cosmic age of only 1.1billion years after the Big Bang. This redshift is significantly higher than earlier estimates and higher than those of most of the hundreds of submillimetre-bright galaxies identified so far. The source has a star-formation rate of 850 solar masses per year and is spatially resolved on scales of 5 kiloparsecs, with an implied dynamical mass of about 1.3×10 11 solar masses, a significant fraction of which is present in the form of molecular gas. Despite our accurate determination of redshift and position, a counterpart emitting starlight remains elusive.
AB - The Hubble Deep Field provides one of the deepest multiwavelength views of the distant Universe and has led to the detection of thousands of galaxies seen throughout cosmic time. An early map of the Hubble Deep Field at a wavelength of 850micrometres, which is sensitive to dust emission powered by star formation, revealed the brightest source in the field, dubbed HDF850.1 (ref. 2). For more than a decade, and despite significant efforts, no counterpart was found at shorter wavelengths, and it was not possible to determine its redshift, size or mass. Here we report a redshift of z = 5.183 for HDF850.1, from a millimetre-wave molecular line scan. This places HDF850.1 in a galaxy overdensity at z≈5.2, corresponding to a cosmic age of only 1.1billion years after the Big Bang. This redshift is significantly higher than earlier estimates and higher than those of most of the hundreds of submillimetre-bright galaxies identified so far. The source has a star-formation rate of 850 solar masses per year and is spatially resolved on scales of 5 kiloparsecs, with an implied dynamical mass of about 1.3×10 11 solar masses, a significant fraction of which is present in the form of molecular gas. Despite our accurate determination of redshift and position, a counterpart emitting starlight remains elusive.
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U2 - 10.1038/nature11073
DO - 10.1038/nature11073
M3 - Article
C2 - 22699613
AN - SCOPUS:84862272163
SN - 0028-0836
VL - 486
SP - 233
EP - 236
JO - Nature
JF - Nature
IS - 7402
ER -