A dusty protocluster surrounding the binary galaxy HerBS-70 at z = 2.3
Artikel i vetenskaplig tidskrift, 2024
We report on deep SCUBA-2 observations at 850 μm and NOrthern Extended Millimetre Array (NOEMA) spectroscopic measurements at 2 mm of the environment surrounding the luminous, massive (M∗ ≈ 2 × 1011 M☉) Herschel-selected source HerBS-70. This source was revealed by previous NOEMA observations to be a binary system of dusty star-forming galaxies at z = 2.3, with the east component (HerBS-70E) hosting an active galactic nucleus. The SCUBA-2 observations detected, in addition to the binary system, 21 sources at >3.5σ over an area of ∼25 square comoving Mpc with a sensitivity of 1σ850 = 0.75 mJy. The surface density of continuum sources around HerBS-70 is three times higher than for field galaxies. The NOEMA spectroscopic measurements confirm the protocluster membership of three of the nine brightest sources through their CO(4–3) line emission, yielding a volume density 36 times higher than for field galaxies. All five confirmed sub-mm galaxies in the HerBS-70 system have relatively short gas depletion times (80−500 Myr), indicating the onset of quenching for this protocluster core due to the depletion of gas. The dark matter halo mass of the HerBS-70 system is estimated around 5 × 1013 M☉, with a projected current-day mass of 1015 M☉, similar to the local Virgo and Coma clusters. These observations support the claim that DSFGs, in particular the ones with observed multiplicity, can trace cosmic overdensities.
submillimetre: galaxies
galaxies: evolution
galaxies: high-redshift
galaxies: clusters: general
Författare
Tom Bakx
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
Nagoya University
National Astronomical Observatory of Japan
S. Berta
Institut de Radioastronomie Millimétrique (IRAM)
H. Dannerbauer
Instituto de Astrofísica de Canarias
Universidad de la Laguna
P. Cox
Institut d 'Astrophysique de Paris
K. M. Butler
Institut de Radioastronomie Millimétrique (IRAM)
Masato Hagimoto
Nagoya University
D. Hughes
Instituto Nacional de Astrofísica, Óptica y Electrońica
D. A. Riechers
Universität zu Köln
P. van der Werf
Universiteit Leiden
Chentao Yang
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
A. J. Baker
University of the Western Cape
Rutgers University
A. Beelen
Centre national de la recherche scientifique (CNRS)
G. J. Bendo
University of Manchester
E. Borsato
Università di Padova
V. Buat
Centre National d'Etudes Spatiales (CNES)
A. Cooray
University of California at Irvine (UCI)
L. Dunne
Cardiff University
S. Dye
University of Nottingham
S. Eales
Cardiff University
R. Gavazzi
University of Cambridge
Institut d 'Astrophysique de Paris
A. I. Harris
University of Maryland
D. Ismail
Centre National d'Etudes Spatiales (CNES)
R. J. Ivison
European Southern Observatory (ESO)
B. M. Jones
University of Manchester
M. Krips
Institut de Radioastronomie Millimétrique (IRAM)
M. Lehnert
École Normale Supérieure de Lyon
L. Marchetti
Istituto nazionale di astrofisica (INAF)
University of Cape Town
H. Messias
European Southern Observatory Santiago
Atacama Large Millimeter-submillimeter Array (ALMA)
M. Negrello
Cardiff University
R. Neri
Institut de Radioastronomie Millimétrique (IRAM)
A.A. Omont
Institut d 'Astrophysique de Paris
I. Perez-Fournon
Instituto de Astrofísica de Canarias
Universidad del Pais Vasco / Euskal Herriko Unibertsitatea
A. Nanni
Narodowe Centrum Badan Jadrowych
Istituto nazionale di astrofisica (INAF)
N. Chartab
University of California
Carnegie Observatories
Universiteit Leiden
S. Serjeant
Open University
F. Stanley
Institut de Radioastronomie Millimétrique (IRAM)
Y. Tamura
Nagoya University
S. Urquhart
Open University
C. Vlahakis
National Radio Astronomy Observatory
A. Weiß
Max-Planck-Gesellschaft
A. J. Young
Rutgers University
Monthly Notices of the Royal Astronomical Society
00358711 (ISSN) 13652966 (eISSN)
Vol. 530 4 4578-4596The Origin and Fate of Dust in Our Universe
Knut och Alice Wallenbergs Stiftelse (KAW 2020.0081), 2021-07-01 -- 2026-06-30.
Knut och Alice Wallenbergs Stiftelse (KAW 2019.0443), 2020-06-01 -- 2023-05-31.
Ämneskategorier
Astronomi, astrofysik och kosmologi
Atom- och molekylfysik och optik
DOI
10.1093/mnras/stae1155