Results 181 to 190 of about 238,114 (290)

JWST Imaging of the Closest Globular Clusters—VI. The Lowest‐Mass Objects in M 4 and the Galactic Bulge

open access: yesAstronomische Nachrichten, Volume 346, Issue 9, November 2025.
ABSTRACT We present James Webb Space Telescope observations of M 4—the closest globular cluster—that probe the lower Main Sequence down to the hydrogen‐burning limit. The unveiled stellar sequence reaches much fainter luminosities than previously possible, revealing a few extremely red objects that are consistent with brown dwarfs as cool as Teff∼1000K$
L. R. Bedin   +10 more
wiley   +1 more source

Effect of Background Magnetic Field on Ion Weibel Instability With High‐Intensity Short‐Pulse Lasers

open access: yesContributions to Plasma Physics, Volume 65, Issue 10, November 2025.
ABSTRACT The effect of finite background magnetic field on magnetic field amplification by Weibel instability using high‐intensity short‐pulse lasers is investigated. We consider Weibel instability for counter‐streaming sub‐relativistic plasma flows generated by shooting pure carbon targets with short‐pulse lasers.
Taiki Jikei   +3 more
wiley   +1 more source

Positron Beam Loading and Acceleration in the Blowout Regime of a Plasma Wakefield Accelerator. [PDF]

open access: yesResearch (Wash D C)
Zhou S   +8 more
europepmc   +1 more source

DIVISION XI: SPACE & HIGH-ENERGY ASTROPHYSICS [PDF]

open access: bronze, 2007
Haruyuki Okuda   +13 more
openalex   +1 more source

Electron Density Structure Measurements With Scattered Intense Laser Beam

open access: yesContributions to Plasma Physics, Volume 65, Issue 10, November 2025.
ABSTRACT Short‐pulse intense lasers have the potential to model extreme astrophysical environments in laboratories. Although there are diagnostics for energetic electrons and ions resulting from laser‐plasma interactions, the diagnostics to measure velocity distribution functions at the interaction region of the laser and plasma are limited.
K. Sakai   +25 more
wiley   +1 more source

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