Results 11 to 20 of about 899 (78)

Astrophysical uncertainties on stellar microlensing constraints on multisolar mass primordial black hole dark matter [PDF]

Physical Review D, 2017
There has recently been interest in multi-Solar mass Primordial Black Holes (PBHs) as a dark matter (DM) candidate. There are various microlensing, dynamical and accretion constraints on the abundance of PBHs in this mass range. Taken at face value these constraints exclude multi-Solar mass PBHs making up all of the DM for both delta-function and ...
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Solar, Stellar and Galactic Connections Between Particle Physics and Astrophysics [PDF]

, 2007
The very small and the very large are intimately connected in Nature. Particle physics and astrophysics meet in fundamental questions: the structure and evolution of stars; their end and how this is manifested; how we think galaxies are created from matter we have yet to discover and why we believe the most energetic particles cannot come from the ...
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Plasma Astrophysics: Kinetic Processes in Solar and Stellar Coronae, Second Edition

Eos, Transactions American Geophysical Union, 2003
A collision‐less plasma is an ionized fluid that is so hot and tenuous that interactions between individual particles are unimportant. In such a plasma, electric and magnetic fields mediate interactions among particles, and fundamental physics is addressed by kinetic theories that describe not only the spatial and temporal variations of the medium, but
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PUH Stellar Planck Core Observational Lead Note — Ten Lines of Anomalous Astrophysical Evidence Unified by the Planck Core Hypothesis: From Solar Polar Features to JWST Little Red Dots to VASCO Disappearances, with T213 Equal-Rate Geometry as the Unifying Mechanism

PUH Stellar Planck Core Observational Lead Note. Identifies ten lines of anomalous astrophysical evidence collectively unified by the PUH Planck core hypothesis. The unifying mechanism is T213 Equal-Rate Theorem (folding = unfolding per unit surface area, single substrate rate R_sub) combined with T210 rate-limit framework (gravitational infall is ...
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Linear astrophysical dynamos in rotating spheres Differential rotation, anisotropic turbulent magnetic diffusivity, and solar-stellar cycle magnetic parity

The Astrophysical Journal, 1984
H. Yoshimura, Z. Wang, F. Wu
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Linear Astrophysical Dynamos in Rotating Spheres - Solar and Stellar Cycle North-South Hemispheric Parity Selection Mechanism and Turbulent Magnetic Diffusivity

The Astrophysical Journal, 1984
H. Yoshimura, F. Wu, Z. Z. Wang
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Deep learning-enabled size estimation of comets indicates a more dynamic early solar system. [PDF]

Nat Commun
Zhao S, Shi X, Lei H, Hui MT, Shi J.
europepmc   +1 more source

Overmassive black holes and little red dots naturally form in simulations. [PDF]

Nature
Chon S, Hirano S, Ishiyama T, Chang SJ, Springel V.   +4 more
europepmc   +1 more source

A Large and Precise All-Sky Photometric Standard Star Dataset Across More Than 200 Passbands. [PDF]

Sci Data
Xiao K, Huang Y, Yuan H, Huang B, Fan D, Beers TC, Li Z, Han H, Zhang Q, Wang T, Ma M, Wang Y, Xu S, Yang L, Liu J.   +14 more
europepmc   +1 more source

PEPSI Investigation, Retrieval, and Atlas of Numerous Giant Atmospheres (PIRANGA). IV. High-resolution Phased-resolved Spectroscopy of the Ultra-hot-Jupiter KELT-20 b. [PDF]

Astron J
Bonidie V, Johnson MC, Wang J, Petz S, Kamen J, Lenhart C, Duck A, Badenes C, Strassmeier K, Ilyin I.   +9 more
europepmc   +1 more source