J/A+A/676/A51ivo://CDS.VizieR/J/A+A/676/A51doi:10.26093/cds/vizier.36760051CDSArrigoni Battaia F.Obreja A.Chen C.-C.Nowotka M.Fumagalli M.,Prochaska J.X.Yang Y.Cai Z.Munoz-Elgueta N.Fossati M.2024-11-06T20:05:29Z2023-08-08T08:26:18ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frgalaxy-clustersmillimeter-astronomysubmillimeter-astronomyquasarsWe conducted a systematic survey of the environment of high-redshift quasars at submillimeter wavelengths to unveil and characterize the surrounding distribution of dusty submillimeter galaxies (SMGs). We took sensitive observations with the SCUBA-2 instrument on the James Clerk Maxwell Telescope for 3 Enormous Lyman-Alpha Nebulae (ELANe) and 17 quasar fields in the redshift range 2<z<4.2 selected from recent Lyman-{alpha} (Ly{alpha}) surveys. These observations uncovered 523 and 102 sources at 850{mu}m and 450{mu}m, respectively, with signal-to-noise S/N>4 or detected in both bands at S/N>3. We run self-consistent Monte-Carlo simulations to construct 850{mu}m number counts and unveil an excess of sources in 75% of the targeted fields. Overall, regions around ELANe and quasars are overabundant with respect to blank fields by a factor of (weighted averages) 3.4+/-0.4 and 2.5+/-0.2, respectively. Therefore, the excess of submillimeter sources is likely part of the Mpc-scale environment around these systems. By combining all fields and repeating the counts analysis in radial apertures, we find (at high significance >~5{sigma}) a decrease of the overdensity factor from >3 within ~2cMpc to ~2 in the annulus at the edge of the surveyed field (~10cMpc), suggesting that the physical extent of the overdensities is larger than our maps. We computed preferred directions for the overdensities of SMGs from the positions of the sources, and used them to orient and create stacked maps of source densities for the quasars' environment. This stacking unveils an elongated structure reminiscent of a large-scale filament with a scale width of ~=3cMpc. Finally, the directions of the overdensities are roughly aligned with the major axis of the Ly{alpha} nebulae, suggesting that the latter trace, on hundreds of kpc, the central regions of the projected large-scale structure described by the SMGs on Mpc scales. Confirming member associations of the SMGs is required to further characterize their spatial and kinematic distribution around ELANe and quasars.2023A&A...676A..51Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/676/A51CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/676/A51https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/676/A51http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/676/A51https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/676/A51https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/676/A51http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/676/A51GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/676/A51/tab_450u (SCUBA-2 450um detected sources within the assumed effective area in 20 quasar fields)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/676/A51/tab_450u?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/676/A51/tab_450u?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/676/A51/tab_450u?GETtext/xml+votable180.050000true130.49416739.3636110.005555555555555556Cone search capability for table J/A+A/676/A51/tab_850u (SCUBA-2 850um detected sources within the assumed effective area in 20 quasar fields)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/676/A51/tab_850u?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/676/A51/tab_850u?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/676/A51/tab_850u?GETtext/xml+votable180.050000true220.37083340.0213890.005555555555555556Cone search capability for table J/A+A/676/A51/list (List of fits files)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/676/A51/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/676/A51/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/676/A51/list?GETtext/xml+votable180.050000true155.0338910.676940.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/676/A516/6471 8477 8842 10573 17317 17735 17805 17816 17895 18466 18521 19458 21020 21022 22013 23099 26882 26888 27429 27431 27549 27759 27845 29795 35737 35740 485032.3390025583187276e-22 4.414320791325542e-22https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/676/A51?format=asciiMillimeterdefaultJ/A+A/676/A51/tab_450uSCUBA-2 450um detected sources within the assumed effective area in 20 quasar fieldsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldTable number (F1-F40 even numbers) (1)obs.fieldcharName450Source name at 450ummeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainS/NSignal-to-noise ratiostat.snrfloatF450Flux density at 450ummJyphot.flux.density;em.mm.400-750GHzinte_F450Error on flux density at 450ummJystat.errorintF450DDeboosted flux density at 450ummJyphot.flux.density;em.mm.400-750GHzinte_F450DError on Deboosted flux density at 450ummJystat.errorintePosError on positionarcsecstat.error;posfloatName850Counterpart name at 850ummeta.idcharS/N850Signal-to-noise ratio at 850umstat.snrfloatF850Flux density at 850ummJyphot.flux.density;em.mm.200-400GHzfloate_F850Error on flux density at 850ummJystat.errorfloatF850D? Deboosted flux density at 850ummJyphot.flux.density;em.mm.200-400GHzfloatnullablee_F850D? Error on Deboosted flux density at 850ummJystat.errorfloatnullableDist? Distance between 850um and 850um detectionsarcsecpos.angDistancefloatnullableJ/A+A/676/A51/tab_850uSCUBA-2 850um detected sources within the assumed effective area in 20 quasar fieldsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldTable number (F1-F40 odd numbers) (1)obs.fieldcharName850Source name at 850ummeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainS/NSignal-to-noise ratiostat.snrfloatF850Flux density at 850ummJyphot.flux.density;em.mm.200-400GHzfloate_F850Error on flux density at 850ummJystat.errorfloatF850DDeboosted flux density at 850ummJyphot.flux.density;em.mm.200-400GHzfloate_F850DError on Deboosted flux density at 850ummJystat.errorfloatePosError on positionarcsecstat.error;posfloatName450Counterpart name at 450ummeta.idcharS/N450Signal-to-noise ratio at 450umstat.snrfloatF450Flux density at 450ummJyphot.flux.density;em.mm.400-750GHzinte_F450Error on flux density at 450ummJystat.errorintF450D? Deboosted flux density at 450ummJyphot.flux.density;em.mm.400-750GHzintnullablee_F450D? Error on Deboosted flux density at 450ummJystat.errorintnullableDist? Distance between 850um and 450um detectionsarcsecpos.angDistancefloatnullableJ/A+A/676/A51/listList of fits filesFieldFieldmeta.id;obs.fieldcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintObs.dateObservation datestime.epoch;obsnullablelambdaWavelengthmem.wldoublesizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitschar