Results 31 to 40 of about 290,820 (278)

Parasite common envelope evolution by triple-star systems [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2021
ABSTRACT We study a scenario in which a giant wide tertiary star engulfs and forces a tight binary system of a white dwarf (WD) and a main-sequence (MS) star to enter a common envelope evolution (CEE) with each other, and then unbinds the WD–MS common envelope.
Noam Soker, Ealeal Bear
openaire   +2 more sources

Criteria for Dynamical Timescale Mass Transfer of Metal-poor Intermediate-mass Stars

open access: yesThe Astrophysical Journal, 2023
The stability criteria of rapid mass transfer and common-envelope evolution are fundamental in binary star evolution. They determine the mass, mass ratio, and orbital distribution of many important systems, such as X-ray binaries, type Ia supernovae, and
Hongwei Ge   +5 more
doaj   +1 more source

Low-Mass Binary Induced Outflows from Asymptotic Giant Branch Stars [PDF]

open access: yes, 2006
A significant fraction of planetary nebulae (PNe) and proto-planetary nebulae (PPNe) exhibit aspherical, axisymmetric structures, many of which are highly collimated.
Alexander   +71 more
core   +3 more sources

On the Formation and Evolution of Common Envelope Systems

open access: yes, 1995
We discuss the formation of a common envelope system following dynamically unstable mass transfer in a close binary, and the subsequent dynamical evolution and final fate of the envelope.
Livio, Mario, Rasio, Frederic A.
core   +2 more sources

Binarity as the solution to the stellar evolution enigma posed by NGC 6791 [PDF]

open access: yes, 2017
Binary evolution is investigated as the source for the extreme horizontal branch (EHB) stars in the old and metal rich open cluster NGC~6791. Employing an updated version of our binary stellar evolution code we demonstrate that EHB stars naturally emerge
Benvenuto, Omar G., Carraro, Giovanni
core   +2 more sources

Comments on the Final Orbital Separation in Common Envelope Evolution

open access: yes, 2002
I study some aspects of common envelope evolution, where a compact star enters the envelope of a giant star. I show that in some binary systems under a narrow range of parameters, a substantial fraction of the giant stellar envelope is lost before the ...
Soker, Noam
core   +2 more sources

Common Envelope Evolution through Planetary Nebula Eyes

open access: yesAIP Conference Proceedings, 2005
The common envelope interaction is responsible for evolved close binaries. Among them are a minority of central stars of planetary nebula (PN). Recent observational results, however, point to most PN actually being in binary systems. We therefore ask the question if it is feasible that most, or even all Galactic PN derive from a common envelope ...
De Marco, Orsola, Moe, Maxwell
openaire   +2 more sources

The first sub-70 minute non-interacting WD-BD system: EPIC212235321 [PDF]

open access: yes, 2018
We present the discovery of the shortest-period, non-interacting, white dwarf-brown dwarf post-common-envelope binary known. The K2 light curve shows the system, EPIC 21223532 has a period of 68.2 min and is not eclipsing, but does show a large ...
A Chaushev   +73 more
core   +2 more sources

Common Envelope Evolution Redux [PDF]

open access: yes, 2008
25 pages, 6 figures. To appear in "Short Period Binary Stars", ed. E.F. Milone, D.A. Leahy, & D.W. Hobill (Springer)
openaire   +2 more sources

Planetary nebula progenitors that swallow binary systems

open access: yes, 2015
I propose that some irregular `messy' planetary nebulae owe their morphologies to triple-stellar evolution where tight binary systems evolve inside and/or on the outskirts the envelope of asymptotic giant branch (AGB) stars.
Soker, Noam
core   +1 more source

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