Results 21 to 30 of about 726,750 (238)

Dynamics of Stellar Systems with Collisions: Eigenvalues and Eigenfunctions in Nearly Collisionless Limit [PDF]

open access: goldThe Astronomical Journal
We examine the decay of perturbations in an infinite homogeneous self-gravitating model with a Maxwellian distribution function (DF) when weak collisions are present.
Evgeny V. Polyachenko, Ilia G. Shukhman
doaj   +3 more sources

Binary Stars Approaching Supermassive Black Holes: Hydrodynamics of Stellar Collisions, Mass Fallback, and Partial Tidal Disruption Events [PDF]

open access: goldThe Astrophysical Journal
When binaries are injected into low-angular-momentum orbits around a central supermassive black hole (SMBH), various outcomes can occur, including binary tidal breakup, double stellar disruptions, and stellar collision.
Fangyuan Yu, Dong Lai
doaj   +2 more sources

Stellar Collisions and Mergers in the Galactic Center

open access: green, 2000
Stars are most likely to merge or collide in regions of the highest stellar densities, and our own Galactic Center contains many stars packed into a relatively small volume -- even the ambient stellar number density in the central 50 pc is quite high, ~10^3 stars pc^{-3}.
Figer, Donald F., Kim, Sungsoo S.
openaire   +4 more sources

The Evolution of Blue Stragglers Formed Via Stellar Collisions [PDF]

open access: yesThe Astronomical Journal, 1998
We have used the results of recent smoothed particle hydrodynamic simulations of colliding stars to create models appropriate for input into a stellar evolution code.
C. J. Pritchet   +10 more
core   +7 more sources

Evolution of Stellar Collision Products in Globular Clusters. I. Head‐on Collisions [PDF]

open access: yesThe Astrophysical Journal, 1997
We explore the evolution of collisionally merged stars in the blue straggler region of the HR diagram. The starting models for our stellar evolution calculations are the results of the smoothed particle hydrodynamics (SPH) simulations of parabolic collisions between main sequence stars performed by Lombardi, Rasio and Shapiro (1996).
Alison Sills   +5 more
openaire   +5 more sources

Gamma-Ray Bursts from Stellar Collisions [PDF]

open access: greenThe Astrophysical Journal, 1998
Latex, 15 pages, and 2 postscript figures.
Brad M. S. Hansen, Chigurupati Murali
openaire   +4 more sources

Magnetic Field Amplification during Stellar Collisions between Low-mass Stars

open access: goldThe Astrophysical Journal Letters
Blue straggler stars in stellar clusters appear younger and bluer than other cluster members, offering a unique opportunity to understand the stellar dynamics and populations within their hosts.
Taeho Ryu   +4 more
doaj   +2 more sources

Accretion flares from stellar collisions in galactic nuclei [PDF]

open access: yesAstronomy & Astrophysics
Context. The strong tidal force in a supermassive black hole’s (SMBH) vicinity, coupled with a higher stellar density at the center of a galaxy, make it an ideal location to study the interaction between stars and black holes. Two stars moving near the SMBH could collide at a very high speed, which can result in a high energy flare.
B. X. Hu, A. Loeb
openaire   +3 more sources

Two-Dimensional Stellar Collisions

open access: bronzeThe Astrophysical Journal, 1968
Head-on collision between two solar type stars, discussing shock front propagation, mass flow and relativistic ...
David S. Deyoung
openaire   +3 more sources

Testing the Bullet Dwarf Collision Scenario in the NGC 1052 Group through Morphologies and Stellar Populations

open access: goldThe Astrophysical Journal
NGC 1052-DF2 and -DF4 are two ultradiffuse galaxies that have been reported as deficient in dark matter and associated with the same galaxy group. Recent findings suggest that DF2 and DF4 are part of a large linear substructure of dwarf galaxies that ...
Yimeng Tang   +10 more
doaj   +2 more sources

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