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Candidate cosmic filament in the GJ526 field, mapped with the NIKA2 camera

Lestrade, J.-F. and Désert, F.-X. and Lagache, G. and Adam, R. and Ade, P. and Ajeddig, H. and André, P. and Artis, E. and Aussel, H. and Beelen, A. and Benoît, A. and Berta, S. and Béthermin, M. and Bing, L. and Bourrion, O. and Calvo, M. and Catalano, A. and Coulais, A. and De Petris, M. and Doyle, S. and Driessen, E. F. C. and Gomez, A. and Goupy, J. and Kéruzoré, F. and Kramer, C. and Ladjelate, B. and Leclercq, S. and Macías-Pérez, J. F. and Maury, A. and Mauskopf, P. and Mayet, F. and Monfardini, A. and Muñoz-Echeverría, M. and Perotto, L. and Pisano, G. and Ponthieu, N. and Revéret, V. and Rigby, A. J. and Ritacco, A. and Romero, C. and Roussel, H. and Ruppin, F. and Schuster, K. and Shu, S. and Sievers, A. and Tucker, C. and Zylka, R. (2022) Candidate cosmic filament in the GJ526 field, mapped with the NIKA2 camera. Astronomy and Astrophysics, 667 . Art. No. A23. ISSN 0004-6361. doi:10.1051/0004-6361/202244036.

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Distinctive large-scale structures have been identified in the spatial distribution of optical galaxies up to redshift z ∼ 1. In the more distant universe, the relationship between the dust-obscured population of star-forming galaxies observed at millimetre wavelengths and the network of cosmic filaments of dark matter apparent in all cosmological hydrodynamical simulations is still under study. Using the NIKA2 dual-band millimetre camera, we mapped a field of ∼90 arcmin² in the direction of the star GJ526 simultaneously in its 1.15-mm and 2.0-mm continuum wavebands to investigate the nature of the quasi-alignment of five sources found ten years earlier with the MAMBO camera at 1.2 mm. We find that these sources are not clumps of a circumstellar debris disc around this star as initially hypothesized. Rather, they must be dust-obscured star-forming galaxies, or sub-millimetre galaxies (SMGs), in the distant background. The new NIKA2 map at 1.15 mm reveals a total of seven SMGs distributed in projection on the sky along a filament-like structure crossing the whole observed field. Furthermore, we show that the NIKA2 and supplemental Herschel photometric data are compatible with a model of the spectral energy distributions (SEDs) of these sources when a common redshift of 2.5 and typical values of the dust parameters for SMGs are adopted. Hence, we speculate that these SMGs might be located in a filament of the distant ‘cosmic web’. The length of this candidate cosmic filament crossing the whole map is at least 4 cMpc (comoving), and the separations between sources are between 0.25 cMpc and 1.25 cMpc at this redshift, in line with expectations from cosmological simulations. Nonetheless, further observations to determine the precise spectroscopic redshifts of these sources are required to definitively support this hypothesis of SMGs embedded in a cosmic filament of dark matter.

Item Type:Article
Related URLs:
URLURL TypeDescription
Désert, F.-X.0000-0001-6478-7883
Lagache, G.0000-0003-1492-2519
Ade, P.0000-0002-5127-0401
Aussel, H.0000-0002-1371-5705
Berta, S.0000-0002-0320-1532
Béthermin, M.0000-0002-3915-2015
Catalano, A.0000-0002-7679-6274
De Petris, M.0000-0001-7859-2139
Driessen, E. F. C.0000-0002-7540-1103
Kramer, C.0000-0002-4908-4925
Mauskopf, P.0000-0001-6397-5516
Monfardini, A.0000-0001-5337-5533
Perotto, L.0000-0001-6937-5052
Rigby, A. J.0000-0002-3351-2200
Ritacco, A.0000-0003-0162-8206
Roussel, H.0000-0001-5617-7129
Ruppin, F.0000-0002-0955-8954
Shu, S.0000-0002-6370-2101
Tucker, C.0000-0002-1851-3918
Additional Information:This work is based on observations carried out under project number 133-17 with the IRAM 30 m telescope. IRAM is supported by INSU/CNRS (France), MPG (Germany) and IGN (Spain). We would like to thank the IRAM staff for their support during the campaigns. The NIKA2 dilution cryostat has been designed and built at the Institut Néel. In particular, we acknowledge the crucial contribution of the Cryogenics Group, and in particular Gregory Garde, Henri Rodenas, Jean Paul Leggeri, Philippe Camus. This work has been partially funded by the Foundation Nanoscience Grenoble and the LabEx FOCUS ANR-11-LABX-0013. This work is supported by the French National Research Agency under the contracts “MKIDS”, “NIKA” and ANR-15-CE31-0017 and in the framework of the “Investissements d’avenir” program (ANR-15-IDEX-02). This work has benefited from the support of the European Research Council Advanced Grant ORISTARS under the European Union’s Seventh Framework Program (Grant Agreement no. 291294). This research has made use of Herschel data; Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France. This research has made use of the NASA/IPAC Extragalactic Database (NED), which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Institut national des sciences de l'Univers (INSU)UNSPECIFIED
Centre National de la Recherche Scientifique (CNRS)UNSPECIFIED
Instituto Geográfico Nacional (IGN)UNSPECIFIED
Foundation Nanoscience GrenobleUNSPECIFIED
Agence Nationale pour la Recherche (ANR)ANR-11-LABX-0013
Agence Nationale pour la Recherche (ANR)ANR-15-CE31-0017
Agence Nationale pour la Recherche (ANR)ANR-15-IDEX-02
European Research Council (ERC)291294
Record Number:CaltechAUTHORS:20221205-666301600.22
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ID Code:118245
Deposited By: Research Services Depository
Deposited On:06 Jan 2023 23:05
Last Modified:06 Jan 2023 23:05

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