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12 papers · 2 filters
Flashlights: An Off-Caustic Lensed Star at Redshift = 1.26 in Abell 370
Ashish Kumar Meena, Wenlei Chen, Adi Zitrin +10
We report the discovery of a transient seen in a strongly lensed arc at redshift in \emph{Hubble Space Telescope} imaging of the Abell 370 galaxy cluster. The tr…
Constraining Cosmological Parameters using the Cluster Mass-Richness Relation
Mohamed H. Abdullah, Gillian Wilson, Anatoly Klypin +1
The cluster mass-richness relation (MRR) is an observationally efficient and potentially powerful cosmological tool for constraining the mean matter density of the universe and the…
A close quasar pair in a disk-disk galaxy merger at z = 2.17
Yu-Ching Chen, Xin Liu, Adi Foord +7
Galaxy mergers produce pairs of supermassive black holes (SMBHs), which may be witnessed as dual quasars if both SMBHs are rapidly accreting. The kiloparsec (kpc)-scale separation…
Galaxy clusters at z~1 imaged by ALMA with the Sunyaev-Zel'dovich effect
T. Kitayama, S. Ueda, N. Okabe +15
We present high angular-resolution measurements of the thermal Sunyaev-Zel'dovich effect (SZE) toward two galaxy clusters, RCS J2319+0038 at z=0.9 and HSC J0947-0119 at z=1.1, by t…
Perturbation Theory Remixed: Improved Nonlinearity Modeling beyond Standard Perturbation Theory
Zhenyuan Wang, Donghui Jeong, Atsushi Taruya +2
We present a novel EPT (th-order Eulerian Perturbation Theory) scheme to model the nonlinear density field by the summation up to th-order density fields in perturbation t…
Revealing Dark Matter Dress of Primordial Black Holes by Cosmological Lensing
Masamune Oguri, Volodymyr Takhistov, Kazunori Kohri
Stellar-mass primordial black holes (PBHs) from the early Universe can directly contribute to the gravitational wave (GW) events observed by LIGO, but can only comprise a subdomina…