Results 21 to 30 of about 108,328 (257)

A Plasma Instability Theory of Gamma-Ray Burst Emission [PDF]

open access: yes, 1999
A new theory for gamma-ray burst radiation is presented. In this theory, magnetic fields and relativistic electrons are created through plasma processes arising as a relativistic shell passes through the interstellar medium.
J. J. Brainerd, Rees M. J.
core   +3 more sources

Supernovae Origin for the Low-latitude Intermediate-velocity Arch and the North Celestial Pole Loop

open access: yesThe Astrophysical Journal, 2023
Supernova explosions attributed to the unseen companion in several binary systems identified by the Third Gaia Data Release (Gaia DR3) may be responsible for a number of well-known and well-studied features in the radio sky, including the low-latitude ...
J. T. Schmelz   +3 more
doaj   +1 more source

The galactic environment of the Sun [PDF]

open access: yes, 1999
The interstellar cloud surrounding the solar system regulates the galactic environment of the Sun and constrains the physical characteristics of the interplanetary medium.
Frisch, P. C.
core   +3 more sources

Supersonic turbulence and structure of interstellar molecular clouds [PDF]

open access: yes, 2002
The interstellar medium (ISM) provides a unique laboratory for highly supersonic, driven hydrodynamics turbulence. We present a theory of such turbulence, confirm it by numerical simulations, and use the results to explain observational properties of ...
B. Dubrulle   +28 more
core   +2 more sources

Search for thermonuclear burst oscillations in the Swift/BAT data set

open access: yesFrontiers in Astronomy and Space Sciences
This study comprehensively analyzes type I X-ray bursts observed by Swift/BAT from 2005 to April 2024 to search for X-ray burst oscillations (XBOs) in neutron star low-mass X-ray binaries.
Qing-Xin Li   +5 more
doaj   +1 more source

STELLA—Potential European contributions to a NASA-led interstellar probe

open access: yesFrontiers in Astronomy and Space Sciences, 2022
The discovery of a myriad of exoplanets in the past decades has revolutionized the understanding of our place in the Universe. How different are exoplants and do some of them harbor life, just like Earth? To do so, their parent stars must drive a stellar
Robert F. Wimmer-Schweingruber   +12 more
doaj   +1 more source

Discovery of a Long Thermonuclear X-Ray Burst from the Ultracompact Binary 4U 1850–087

open access: yesThe Astrophysical Journal
We report the detection of a long X-ray burst from the ultracompact binary 4U 1850–087. The type I X-ray burst was observed on MJD 60171.65 by the Monitor of All-sky X-ray Image and Neutron Star Interior Composition Explorer (NICER). We analyze the NICER
Yongqi Lu   +4 more
doaj   +1 more source

Variability of GRB Afterglows Due to Interstellar Turbulence [PDF]

open access: yes, 1999
Gamma-Ray Burst (GRB) afterglows are commonly interpreted as synchrotron emission from a relativistic blast wave produced by a point explosion in an ambient medium, plausibly the interstellar medium of galaxies.
Abraham Loeb   +3 more
core   +2 more sources

Charge State Influence on Stability and Isomerism in Dehydrogenated PAHs: Insights from Anthracene, Acridine, and Phenazine

open access: yesChemPhysChem, Volume 26, Issue 6, March 15, 2025.
The ionization of anthracene, acridine, and phenazine has been explored, along with the removal of one and two hydrogen atoms, to provide valuable information for astrochemists and to understand the behavior of the resulting structures and their electronic reorganization. Abstract In this study, we systematically explored the stability and isomerism of
Khaldia Zghida   +3 more
wiley   +1 more source

OO Leo: An Active Contact Binary with Possible Solar-like Differential Rotation

open access: yesThe Astrophysical Journal
With Transiting Exoplanet Survey Satellite (TESS) high-precision photometry and Large Sky Area Multi-object Fiber Spectroscopic Telescope medium-resolution spectra, we present the first light and radial velocity curve analyses for the eclipsing binary OO
Zi-Bin Meng   +4 more
doaj   +1 more source

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