Results 61 to 70 of about 385,645 (329)

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

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

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

Darboux class of cosmological fluids with time-dependent adiabatic indices

, 2000
A one-parameter family of time dependent adiabatic indices is introduced for any given type of cosmological fluid of constant adiabatic index by a mathematical method belonging to the class of Darboux transformations.
Dunne G., H. C. ROSU, Landau L. D., Perlmutter S., Rosu H., Rosu H. C., Rosu H. C., Witten E.   +7 more
core   +2 more sources

The problem of singularities and chaos in cosmology [PDF]

, 2010
We consider different aspects of the problem of cosmological singularity such as the BKL oscillatory approach to the singularity, the new features of the cosmological dynamics in the neighbourhood of the singularity in multidimensional and superstring ...
Kamenshchik, A. Yu.
core   +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

Phantom cosmologies

Physical Review D, 2004
12 pages, revtex, 3 figures, 1 table, references ...
openaire   +2 more sources

COSMOLOGICAL BACKREACTION [PDF]

The Twelfth Marcel Grossmann Meeting, 2012
15 pages, 3 figures; presented at the 12th Marcel Grossmann Meeting, Paris, July ...
openaire   +3 more sources