Results 51 to 60 of about 188 (137)
Mining for Protoclusters at z ∼ 4 from Photometric Data Sets with Deep Learning
The Astrophysical JournalProtoclusters are high- z overdense regions that will evolve into clusters of galaxies by z = 0, making them ideal for studying galaxy evolution expected to be accelerated by environmental effects.
Yoshihiro Takeda +11 more
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Protoclusters traced by high-redshift quasars
, 2021 Luminous z~4 quasars (QSOs) are the most strongly clustered population known in the early universe, and they should thus reside in massive dark matter halos surrounded by large overdensities of galaxies. Most QSO environment studies at z>~4 have been aimed at detecting overdensities of optical-selected galaxies around QSOs, but to-date such ...
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Narrowband Imaging of a z = 3.24 Protocluster: Insights from [O iii]-emitting Galaxies
The Astrophysical JournalWe present narrowband imaging of a spectroscopically confirmed protocluster “D4UD01” at z = 3.24 using CFHT/WIRCam. We identify a sample of 24 [O iii ] emission-line galaxies in the field, which forms a large overdensity in the protocluster region.
Ke Shi +4 more
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The Astrophysical Journal Supplement SeriesWe use the H41 α recombination line to create templates of the millimeter free–free emission in the ALMA-IMF continuum maps, which allows us to separate it from dust emission.
Roberto Galván-Madrid +27 more
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The Astrophysical Journal, 2023 We present a catalog of 315 protostellar outflow candidates detected in SiO J = 5 − 4 in the ALMA-IMF Large Program, observed with ∼2000 au spatial resolution, 0.339 km s ^−1 velocity resolution, and 2–12 mJy beam ^−1 (0.18–0.8 K) sensitivity.
A. P. M. Towner +26 more
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How Massive Star Clusters Form and Evolve: A Near-IR Survey of the W51 Complex
The Astronomical JournalWe present near-infrared JHK _s and narrowband H _2 (1–0) photometric observations of the W51A region, obtained with GTC EMIR, aiming to characterize its young stellar population, and provide mass estimates for individual cluster members and the ...
Aden Dawson +2 more
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High Redshift Clusters and Protoclusters
, 1999 Our understanding of the cosmic history of galaxy clusters has recently been enhanced due to an extensive series of observations including faint spectroscopic data (especially those obtained at the Keck Observatory), deep optical and NIR imaging from the ground and in space, morphological data from HST, and new constraints on the evolution of the ...
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SPECTROSCOPIC CONFIRMATION OF A PROTOCLUSTER AT z ≈ 3.786 [PDF]
The Astrophysical Journal, 2016 ABSTRACT We present new observations of the field containing the z = 3.786 protocluster PC 217.96+32.3. We confirm that it is one of the largest known and most overdense high-redshift structures. Such structures are rare even in the largest cosmological simulations. We used the Mayall/MOSAIC1.1 imaging camera to image a 1.°2 × 0.°6 area (
Arjun Dey +7 more
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The Astrophysical JournalWe study the luminosity function (LF) and clustering properties of 888 H α emitters (HAEs) at 3.75
Xiaojing Lin +22 more
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LATIS: A Sample of IGM-selected Protoclusters and Protogroups at z ∼ 2.5
The Astrophysical JournalThe Ly α Tomography IMACS Survey (LATIS) has produced large 3D maps of the intergalactic medium (IGM), providing a new window on the cosmic web at z ∼ 2.5.
Andrew B. Newman +13 more
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