Results 121 to 130 of about 48,997 (217)

Nature of High Equivalent Width Emitters in the Epoch of Reionization Revealed by JWST Medium-band Imaging

The Astrophysical Journal
Extreme emission line galaxies (EELGs) at high redshifts are considered key contributors to cosmic reionization at z  > 6 due to their higher ionization efficiencies.
Kazuki Daikuhara, Takahiro Morishita, Tadayuki Kodama, Ranga-Ram Chary, Masayuki Akiyama, Jose. M. Pérez-Martínez   +5 more
doaj   +1 more source

A faint field-galaxy redshift survey in quasar fields [PDF]

Quasars serve as excellent markers for the identification of high-redshift galaxies and galaxy clusters. In past surveys, nearly 20 clusters of Abell richness class 1 or richer associated with quasars in the redshift range 0.2 less than z less than 0.8 ...
Ellingson, Erica, Yee, Howard K. C.
core   +1 more source

HST Grism Observations of a z ∼ 1.8 Cluster Candidate from the Clusters Occupied by Bent Radio AGN (COBRA) Survey

The Astrophysical Journal
We present new Hubble Space Telescope/Wide Field Camera 3 G141 grism observations for COBRA 1411+3415, originally identified as a high-redshift cluster candidate in the Clusters Occupied by Bent Radio AGN (COBRA) survey using radio, infrared, and optical
Courtney B. Watson, Elizabeth L. Blanton, Emmet Golden-Marx, Matthew L. N. Ashby, Scott W. Randall, J. D. Wing, E. M. Douglass   +6 more
doaj   +1 more source

Weak Lensing Observations of High-Redshift Clusters of Galaxies

, 1999
We present results of a weak gravitational lensing survey of six X-ray selected high-redshift clusters of galaxies. We find that the masses of the clusters derived from weak lensing are comparable to those derived from the X-ray observations. We show that many of the clusters have significant substructure not observed in the X-ray observations and that
Clowe, D., Luppino, G., Kaiser, N., Gioia, I.   +3 more
openaire   +2 more sources

Selecting Clusters and Protoclusters via Stellar Mass Density. II. Application to HSC-SSP Observations

The Astrophysical Journal
We present a selection of candidates of clusters and protoclusters of galaxies identified in the photometric data of the HSC-SSP Wide Public Data Release 3 (PDR3), spanning the redshift range 0.1 ≤ z ≤ 2. The selection method, detailed in Vicentin et al.,
Marcelo C. Vicentin, Laerte Sodré Jr., Michael A. Strauss, Erik V. R. de Lima, Pablo Araya-Araya   +4 more
doaj   +1 more source

A Galaxy Cluster Near NGC 720

, 2005
The galaxy cluster RXJ 0152.7-1357 is emitting X-rays at the high rate of 148 counts $ks^{-1}$. It would be one of the most luminous X-ray clusters known if it is at its redshift distance of z = .8325.
Arp, H.
core   +1 more source

Efficient Survey Design for Finding High-redshift Galaxies with JWST

The Astrophysical Journal
Several large JWST blank field observing programs have not yet discovered the first galaxies expected to form at 15 ≤ z ≤ 20. This has motivated the search for more effective survey strategies that will be able to effectively probe this redshift range ...
Luka Vujeva, Charles L. Steinhardt, Christian Kragh Jespersen, Brenda L. Frye, Anton M. Koekemoer, Priyamvada Natarajan, Andreas L. Faisst, Pascale Hibon, Lukas J. Furtak, Hakim Atek, Renyue Cen, Albert Sneppen   +11 more
doaj   +1 more source

The JWST Discovery of the Triply Imaged Type Ia “Supernova H0pe” and Observations of the Galaxy Cluster PLCK G165.7+67.0

The Astrophysical Journal
A Type Ia supernova (SN) at z = 1.78 was discovered in James Webb Space Telescope Near Infrared Camera imaging of the galaxy cluster PLCK G165.7+67.0 (G165; z = 0.35).
Brenda L. Frye, Massimo Pascale, Justin Pierel, Wenlei Chen, Nicholas Foo, Reagen Leimbach, Nikhil Garuda, Seth H. Cohen, Patrick S. Kamieneski, Rogier A. Windhorst, Anton M. Koekemoer, Pat Kelly, Jake Summers, Michael Engesser, Daizhong Liu, Lukas J. Furtak, Maria del Carmen Polletta, Kevin C. Harrington, S. P. Willner, Jose M. Diego, Rolf A. Jansen, Dan Coe, Christopher J. Conselice, Liang Dai, Hervé Dole, Jordan C. J. D’Silva, Simon P. Driver, Norman A. Grogin, Madeline A. Marshall, Ashish K. Meena, Mario Nonino, Rafael Ortiz III, Nor Pirzkal, Aaron Robotham, Russell E. Ryan Jr., Lou Strolger, Scott Tompkins, Christopher N. A. Willmer, Haojing Yan, Min S. Yun, Adi Zitrin   +40 more
doaj   +1 more source

The XMM-Newton $\Omega$ Project

, 2001
The abundance of high-redshift galaxy clusters depends sensitively on the matter density $\OmM$ and, to a lesser extent, on the cosmological constant $\Lambda$. Measurements of this abundance therefore constrain these fundamental cosmological parameters,
Adami, C., Aghanim, N., Arnaud, M., Bartlett, J. G., Bernard, J. -Ph., Blanchard, A., Boer, M., Burke, D. J., Collins, C. A., Giard, M., Lumb, D. H., Majerowicz, S., Marty, Ph., Neumann, D., Nevalainen, J., Nichol, R. C., Pichon, C., Romer, A. K., Sadat, R.   +18 more
core   +1 more source

Is Earendel a Star Cluster?: Metal-poor Globular Cluster Progenitors at z ∼ 6

The Astrophysical Journal Letters
The strongly lensed z  ∼ 6 Sunrise galaxy offers an incredible opportunity to investigate star formation in the early Universe on parsec or smaller scales.
Massimo Pascale, Liang Dai, Brenda L. Frye, Aliza G. Beverage   +3 more
doaj   +1 more source