Results 71 to 80 of about 2,272 (184)
AzTEC 1.1 mm observations of high-z protocluster environments : SMG overdensities and misalignment between AGN jets and SMG distribution [PDF]
, 2018 We present observations at 1.1 mm towards 16 powerful radio galaxies and a radio-quiet quasar at 0.5 > z > 6.3 acquired with the AzTEC camera mounted at the James Clerk Maxwell Telescope and Atacama Submillimeter Telescope Experiment to study the spatial
Aretxaga, I. +22 more
core +4 more sources
The Ages of Passive Galaxies in a z = 1.62 Protocluster [PDF]
The Astrophysical Journal, 2017 Abstract We present a study of the relation between galaxy stellar age and mass for 14 members of the z = 1.62 protocluster IRC 0218, using multiband imaging and HST G102 and G141 grism spectroscopy. Using UVJ colors to separate galaxies into star-forming and quiescent populations, we find that, at stellar masses
Donald B. Lee-Brown +11 more
openaire +2 more sources
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
doaj +1 more source
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
doaj +1 more source
Can Cosmological Simulations Reproduce the Spectroscopically Confirmed Galaxies Seen at z ≥ 10?
The Astrophysical Journal Letters, 2023 Recent photometric detections of extreme ( z > 10) redshift galaxies from the JWST have been shown to be in strong tension with existing simulation models for galaxy formation and in the most acute case, in tension with ΛCDM itself.
B. W. Keller +3 more
doaj +1 more source
Substructure within the SSA22 protocluster at $z\approx3.09$ [PDF]
, 2016 We present the results of a densely sampled spectroscopic survey of the SSA22 protocluster at $z\approx 3.09$. Our sample with Keck/LRIS spectroscopy includes 106 Ly$\alpha$ Emitters (LAEs) and 40 Lyman Break Galaxies (LBGs) at $z=3.05-3.12$.
Shapley, Alice E. +2 more
core +3 more sources
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
doaj +1 more source
MeerKAT observations of Herschel protocluster candidates
Monthly Notices of the Royal Astronomical SocietyABSTRACT High-redshift protoclusters consisting of dusty starbursts are thought to play an important role in galaxy evolution. Their dusty nature makes them bright in the far-infrared (FIR)/submm but difficult to find in optical/near-infrared (NIR) surveys.
Y Ding +11 more
openaire +2 more sources
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
doaj +1 more source
, 2009 We present new information on galaxies in the vicinity of luminous radio galaxies and quasars at z=4,5,6. These fields were previously found to contain overdensities of Lyman Break Galaxies (LBGs) or spectroscopic Lyman alpha emitters.
Adelberger +89 more
core +1 more source