Results 31 to 40 of about 41,311 (309)

Massive first star binaries as new tools for Galactic archaeology [PDF]

EPJ Web of Conferences, 2022
Binary systems are important probes of the origin of stars with peculiar chemical features through the interactions between two stars. We have studied the evolution of a metal-free massive binary after the collision of the supernova ejecta with a low ...
Suda Takuma, Saitoh Takayuki R., Moritani Yuki, Matsuno Tadafumi, Shigeyama Toshikazu   +4 more
doaj   +1 more source

Stellar Collisions in the Galactic Center: Massive Stars, Collision Remnants, and Missing Red Giants

The Astrophysical Journal, 2023
Like most galaxies, the Milky Way harbors a supermassive black hole (SMBH) at its center, surrounded by a nuclear star cluster. In this dense star cluster, direct collisions can occur between stars before they evolve off the main sequence.
Sanaea C. Rose, Smadar Naoz, Re’em Sari, Itai Linial   +3 more
doaj   +1 more source

The rate of WD-WD head-on collisions in isolated triples is too low to explain standard type Ia supernovae

, 2017
Type Ia supernovae (Ia-SNe) are thought to arise from the thermonuclear explosions of white dwarfs (WDs). The progenitors of such explosions are still highly debated; in particular the conditions leading to detonations in WDs are not well understood in ...
Hamers, A. S., Perets, H. B., Toonen, S.
core   +4 more sources

Wave Conversion, Decay, and Heating in a Partially Ionized Two-fluid Magneto-atmosphere

The Astrophysical Journal, 2023
A ray-theoretic phase-space description of linear waves in a two-fluid (charges and neutrals) magnetized plasma is used to calculate analytic decay rates and mode transmission and conversion coefficients between fast and slow waves in two dimensions due ...
Paul S. Cally, M. M. Gómez-Míguez
doaj   +1 more source

Modelling Collision Products of Triple-Star Mergers

, 2003
In dense stellar clusters, binary-single and binary-binary encounters can ultimately lead to collisions involving two or more stars. A comprehensive survey of multi-star collisions would need to explore an enormous amount of parameter space, but here we ...
A. P. Thrall, Aarseth, Bacon, Bailyn, Balsara, Baumgardt, Benz, Cleary, Clement, Clement, Davies, Eriguchi, Freitag, Freitag, Gerssen, Gerssen, Giersz, Giersz, Gingold, Goodman, Heggie, Heggie, Hockney, Hurley, Hurley, Hurley, Hurley, Hut, Hut, J. C. Lombardi, J. S. Deneva, Joshi, Joshi, Lai, Lombardi, Lombardi, Lombardi, Lucy, McMillan, Meylan, Monaghan, Ostriker, Ouellette, P. E. Grabowski, Portegies Zwart, Portegies Zwart, Portegies Zwart, Portegies Zwart, Portegies Zwart, Portegies Zwart, Quinlan, Rasio, Rasio, Rasio, Rasio, Rasio, Rasio, Rubenstein, S. W. Fleming, Sandquist, Sandquist, Sandquist, Shara, Shara, Sills, Sills, Sills, Sills, Sills, Springel, Spurzem, Takahashi, Terman, Terman, Uryu, Vesperini, Watters   +76 more
core   +1 more source

The triple evolution dynamical instability: Stellar collisions in the field and the formation of exotic binaries

, 2012
Physical collisions and close approaches between stars play an important role in the formation of exotic stellar systems. Standard theories suggest that collisions are rare, occurring only via random encounters between stars in dense clusters. We present
Kratter, Kaitlin M., Perets, Hagai B.
core   +1 more source

Simulations of two-planet systems through all phases of stellar evolution: implications for the instability boundary and white dwarf pollution [PDF]

, 2013
Exoplanets have been observed at many stages of their host star's life, including the main sequence (MS), subgiant and red giant branch stages. Also, polluted white dwarfs (WDs) likely represent dynamically active systems at late times.
Bonsor, Amy, Mustill, Alexander J., Veras, Dimitri, Wyatt, Mark C.   +3 more
core   +2 more sources

Star−Disk Collisions: Implications for Quasi-periodic Eruptions and Other Transients near Supermassive Black Holes

The Astrophysical Journal
We use Athena++ to study the hydrodynamics of repeated star−accretion disk collisions close to supermassive black holes, and we discuss their implications for the origin of quasi-periodic eruptions (QPEs) and other repeating nuclear transients.
Philippe Z. Yao, Eliot Quataert, Yan-Fei Jiang, Wenbin Lu, Christopher J. White   +4 more
doaj   +1 more source

Towards the Provision of Accurate Atomic Data for Neutral Iron

Galaxies, 2018
The rich emission and absorption line spectra of Fe I may be used to extract crucial information on astrophysical plasmas, such as stellar metallicities.
Andrew Conroy, Catherine Ramsbottom, Connor Ballance, Francis Keenan   +3 more
doaj   +1 more source

Types of Gaseous Envelopes of "Hot Jupiter" Exoplanets

, 2013
As a rule, the orbital velocities of "hot Jupiters," i.e., exoplanets with masses comparable to the mass of Jupiter and orbital semi-major axes less than 0.1 AU, are supersonic relative to the stellar wind, resulting in the formation of a bow shock.
Bisikalo, D. V., Ionov, D. E., Kaigorodov, P. V., Shematovich, V. I   +3 more
core   +1 more source