Overdensity of SubMillimiter Galaxies in the GJ526 Field mapped with the NIKA2 Camera

J.-F. Lestrade (1) , R. Adam (2) , P. Ade , H. Ajeddig (3) , P. Andre (3) , E. Artis (4) , H. Aussel (3) , A. Beelen (5) , A. Benoit (6) , S. Berta (7) , L. Bing (8) , O. Bourrion (4) , M. Calvo (9) , A. Catalano (4) , A. Coulais (1) , M. de Petris , F.-X. Desert (10) , S. Doyle , E.F.C. Driessen (7) , A. Gomez , J. Goupy (6) , F. Keruzore (4) , C. Kramer (11) , B. Ladjelate (7) , G. Lagache (8) , S. Leclercq (11) , J.-.F. Macias-Perez (4) , A. Maury (3) , P. Mauskopf , F. Mayet (4) , A. Monfardini (6) , M. Munoz-Echeverria (4) , L. Perotto (4) , G. Pisano (4) , N. Ponthieu (10) , V. Reveret (3) , A.J. Rigby , A. Ritacco (5, 12) , C. Romero , H. Roussel (13) , F. Ruppin , K. Schuster (7) , S. Shu , A. Sievers (11) , C. Tucker , R. Zylka (7)

1 LERMA - Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique et Atmosphères = Laboratory for Studies of Radiation and Matter in Astrophysics and Atmospheres
2 LLR - Laboratoire Leprince-Ringuet
3 AIM (UMR7158 / UMR_E_9005 / UM_112) - Astrophysique Interprétation Modélisation
4 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
5 IAS - Institut d'astrophysique spatiale
6 NEEL - HELFA - Hélium : du fondamental aux applications
7 IRAM - Institut de RadioAstronomie Millimétrique
8 LAM - Laboratoire d'Astrophysique de Marseille
9 NEEL - Cryo - Cryogénie
10 IPAG - Institut de Planétologie et d'Astrophysique de Grenoble
11 IRAM - Instituto de RadioAstronomía Milimétrica
12 Astrophysique
13 IAP - Institut d'Astrophysique de Paris

Using the NIKA2 dual band millimeter camera installed on the IRAM30m telescope, we have mapped a relatively large field (~ 70 arcmin2) in the direction of the star GJ526 to investigate the nature of the sources found with the MAMBO camera at 1.2 mm ten years earlier. We have found that they must be dust-obscured galaxies (SMGs) in the background beyond the star. The new NIKA2 map at 1.15 mm reveals additional sources and, in fact, an overdensity of SMGs predominantly distributed along a filament-like structure in projection on the sky across the whole observed field. We speculate this might be a cosmic filament at high redshift as revealed in cosmological hydrodynamical simulations. Measurement of spectroscopic redshifts of the SMGs in the candidate filament is required now for a definitive confirmation of the nature of the structure.

Domaines: Astrophysique [astro-ph]

J.-F. Lestrade, R. Adam, P. Ade, H. Ajeddig, P. Andre, et al.. Overdensity of SubMillimiter Galaxies in the GJ526 Field mapped with the NIKA2 Camera. mm Universe @ NIKA2 , Jun 2021, Online, Italy. pp.00027, ⟨10.1051/epjconf/202225700027⟩. ⟨hal-03436787⟩