MAMMOTH: Confirmation of two massive galaxy overdensities at z = 2.24 with Hα emitters

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dc.contributor.authorAn, F.X
dc.contributor.authorZheng, X.Z
dc.contributor.authorCai, Z
dc.date.accessioned2021-06-03T10:17:38Z
dc.date.available2021-06-03T10:17:38Z
dc.date.issued2021
dc.description.abstractMassive galaxy overdensities at the peak epoch of cosmic star formation provide ideal testbeds for the formation theories of galaxies and large-scale structure. We report the confirmation of two massive galaxy overdensities at z = 2.24, BOSS1244 and BOSS1542, selected from the Mapping the Most Massive Overdensities Through Hydrogen (MAMMOTH) project using Lyα absorption from the intergalactic medium over the scales of 15-30 h-1 Mpc imprinted on the quasar spectra. We use Hα emitters (HAEs) as the density tracer and identify them using deep narrow-band H2S(1) and broad-band Ks imaging data obtained with the wide-field infrared camera (WIRCam) at the Canada-France-Hawaii Telescope. In total, 244 and 223 line emitters are detected in these two fields, and 196 ± 2 and 175 ± 2 are expected to be HAEs with an Hα flux of >2.5 × 10-17 erg s-1 cm-2 (corresponding to a star formation rate of >5 M· yr-1). The detection rate of HAE candidates suggests an overdensity factor of δgal = 5.6 ± 0.3 and 4.9 ± 0.3 over the volume of 54 × 32 × 32 co-moving Mpc3.en_US
dc.identifier.citationAn, F.X. et al. (2021). MAMMOTH: Confirmation of two massive galaxy overdensities at z = 2.24 with Hα emitters. Monthly Notices of the Royal Astronomical Society, 500(4), 4354-4364en_US
dc.identifier.issn00358711
dc.identifier.uri10.1093/mnras/staa2882
dc.identifier.urihttp://hdl.handle.net/10566/6255
dc.language.isoenen_US
dc.publisherOxford University Pressen_US
dc.subjectGalaxies: clustersen_US
dc.subjectGalaxies: star formationen_US
dc.subjectGalaxies: high-redshiften_US
dc.subjectQuasars: absorption linesen_US
dc.subjectBOSS1244en_US
dc.titleMAMMOTH: Confirmation of two massive galaxy overdensities at z = 2.24 with Hα emittersen_US
dc.typeArticleen_US

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