Results 61 to 70 of about 310,031 (299)

Solar System-scale Interferometry on Fast Radio Bursts Could Measure Cosmic Distances with Subpercent Precision

The Astrophysical Journal Letters, 2023
The light from an extragalactic source at a distance d will arrive at detectors separated by 100 au at times that differ by as much as 120( d /100 Mpc) ^−1 nanoseconds because of the curvature of the wave front. At gigahertz frequencies, the arrival time
Kyle Boone, Matthew McQuinn
doaj   +1 more source

Cosmological constant, violation of cosmological isotropy and CMB

, 2009
We suggest that the solution to the cosmological vacuum energy puzzle does not require any new field beyond the standard model, but rather can be explained as a result of the interaction of the infrared sector of the effective theory of gravity with ...
, A.A. Starobinsky, Ariel R Zhitnitsky, C.J. Copi, E.C. Thomas, F.K. Hansen, F.R. Klinkhamer, F.R. Urban, F.R. Urban, Federico R Urban, J. Bjorken, J.D. Bjorken, N.J. Cornish, Supernova Cosmology Project collaboration, Supernova Search Team collaboration, WMAP collaboration, Y.B. Zeldovich, Y.B. Zeldovich   +17 more
core   +1 more source

The Layout and Size of an Early Pre‐Pottery Neolithic B Small Settlement Revealed by Geophysical Prospection at Harbetsuvan Tepesi in Southeastern Anatolia

Archaeological Prospection, EarlyView.
ABSTRACT In Upper Mesopotamia, the transition from the Pre‐Pottery Neolithic A (PPNA) to Pre‐Pottery Neolithic B (PPNB) period, ca. 10 800–10 600 cal. BP, is marked by a series of changes in chipped stone industries, architectural forms, symbolic objects, regional distribution of settlements and long‐distance exchange networks among others.
Toshihiro Tada, Ryota Moriwaki, Kazuya Shimogama, Kenta Suzuki, Wataru Satake, Nurcan Küçükarslan, Celal Uludağ, Yoshihiro Nishiaki   +7 more
wiley   +1 more source

Non-minimal coupling influence on the deviation from de Sitter cosmological expansion

, 2018
We investigate the models of cosmological inflation in generalized scalar-tensor gravity, which we consider as a source of deviation from de Sitter dynamics in the case of GR.
Chervon, Sergey V., Fomin, Igor V.
core   +1 more source

Cosmological parameters [PDF]

Second international workshop on particle physics and the early universe (COSMO-98), 1999
The discussion of cosmological parameters used to be a source of embarrassment to cosmologists. Today, measurements of the cosmological parameters are leading the way into the era of precision cosmology. The CMB temperature is measured to four significant figures, T_0=2.7277+/-0.002 K; the Hubble constant is now determined with a reliable error ...
openaire   +2 more sources

Opposing consensus science through scholarly practices: The role of claims maintenance

Journal of the Association for Information Science and Technology, EarlyView.
Abstract This study examines how three US‐based communities who oppose consensus science produce and disseminate scholarly‐like artifacts: pro‐life activists, Young Earth Creationists, and Anthropogenic Climate Crisis skeptics. Prior research shows that industry‐ or church‐backed advocacy campaigns often generate claims supported by these communities ...
Irene V. Pasquetto, Morgan Wofford, Claire Jordan, Andrea Thomer   +3 more
wiley   +1 more source

Crescendo beyond the horizon: more gravitational waves from domain walls bounded by inflated cosmic strings

Journal of High Energy Physics
Gravitational-wave (GW) signals offer a unique window into the dynamics of the early universe. GWs may be generated by the topological defects produced in the early universe, which contain information on the symmetry of UV physics.
Yunjia Bao, Keisuke Harigaya, Lian-Tao Wang   +2 more
doaj   +1 more source

Thermodynamics of Bardeen black holes in restricted phase space

Physics Letters B
In this paper, we investigate the thermodynamics of Bardeen black holes within the framework of Restricted Phase Space (RPS) thermodynamics. Building upon the holographic interpretation of black hole thermodynamics, we derive key thermodynamic quantities,
Yahya Ladghami, Brahim Asfour, Amine Bouali, Ahmed Errahmani, Taoufik Ouali   +4 more
doaj   +1 more source

The THESEUS Space Mission and the Infrared Telescope Calibration Unit

Astronomische Nachrichten, EarlyView.
ABSTRACT The Transient High‐Energy Sky and Early Universe Surveyor (THESEUS) is an ESA M7 mission concept currently in Phase A, designed to exploit gamma‐ray bursts to probe the early Universe while advancing multi‐messenger and time‐domain astrophysics. To achieve its ambitious goals, THESEUS will combine wide‐band x‐ray and gamma‐ray monitors with an
András Péter Joó, Rebeka Gyöngyi Kiss, Lorenzo Amati, Bendegúz Koncz, Örs Detre, Gyula Zilizi, Zsolt Bagoly, István I. Rácz, Sándor Pintér, L. Viktor Tóth   +9 more
wiley   +1 more source

Explicit construction of Penrose diagrams for black hole to white hole transition with spacelike thin shells

Scientific Reports
In this article, we explicitly construct the coordinates associated with the Penrose diagram in spacetimes connected via a spacelike thin shell in the following two examples: the generalized black-to-white hole bounce with mass difference and the ...
Wei-Chen Lin, Dejan Stojkovic, Dong-han Yeom   +2 more
doaj   +1 more source