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.
Overdensity of SubMillimiter Galaxies in the GJ526 Field mapped with the NIKA2 Camera / Lestrade, J. -F.; Adam, R.; Ade, P.; Ajeddig, H.; André, P.; Artis, E.; Aussel, H.; Beelen, A.; Benoît, A.; Berta, S.; Bing, L.; Bourrion, O.; Calvo, M.; Catalano, A.; Coulais, A.; De Petris, M.; Désert, F. -X.; Doyle, S.; Driessen, E. F. C.; Gomez, A.; Goupy, J.; Kéruzoré, F.; Kramer, C.; Ladjelate, B.; Lagache, G.; Leclercq, S.; Macías-Pérez, J. - F.; Maury, A.; Mauskopf, P.; Mayet, F.; Monfardini, A.; Muñozecheverría, M.; Perotto, L.; Pisano, G.; Ponthieu, N.; Revéret, V.; Rigby, A. J.; Ritacco, A.; Romero, C.; Roussel, H.; Ruppin, F.; Schuster, K.; Shu, S.; Sievers, A.; Tucker, C.; Zylka, and R.. - In: EPJ WEB OF CONFERENCES. - ISSN 2101-6275. - 257:(2022). (Intervento presentato al convegno mm Universe @ NIKA2 - Observing the mm Universe with the NIKA2 camera tenutosi a Rome) [10.1051/epjconf/202225700027].
Overdensity of SubMillimiter Galaxies in the GJ526 Field mapped with the NIKA2 Camera
M. De Petris;G. Pisano;
2022
Abstract
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.| File | Dimensione | Formato | |
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Note: https://www.epj-conferences.org/articles/epjconf/abs/2022/01/epjconf_mmUniverse2021_00027/epjconf_mmUniverse2021_00027.html
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