Results 41 to 50 of about 290,820 (278)
Masses and envelope binding energies of primary stars at the onset of a common envelope [PDF]
, 2010 We present basic properties of primary stars that initiate a common envelope (CE) in a binary, while on the giant branch. We use the population-synthesis code described in Politano et al. (2010) and follow the evolution of a population of binary stars up
Politano, Michael +2 more
core +2 more sources
Moving Boundaries in Common Envelope Evolution
Proceedings of the Wisconsin Space Conference, 2022 The common envelope phase in binary star systems is simulated using the 3-D moving-mesh hydrodynamic code MANGA. The companion object is modeled as a moving boundary condition in our simulations. We outline the methodology of implementing moving boundary conditions into MANGA, which are reactive to hydrodynamic and gravitational forces.
openaire +2 more sources
Fits for the Convective Envelope Mass in Massive Stars
The Astrophysical JournalWe explore the evolution of massive stars (>8 M _⊙ ) with 1D models and present analytical fits to the masses and binding energies of the convective portions of their envelopes.
Lewis Picker, Ryosuke Hirai, Ilya Mandel
doaj +1 more source
ALMA view of the circumstellar environment of the post-common-envelope-evolution binary system HD101584 [PDF]
, 2015 We study the circumstellar evolution of the binary HD101584, consisting of a post-AGB star and a low-mass companion, which is most likely a post-common-envelope-evolution system. We used ALMA observations of the 12CO, 13CO, and C18O J=2-1 lines and the 1.
Humphreys, E. M. L. +6 more
core +2 more sources
Evolution of Massive Common Envelope Binaries and Mass Loss [PDF]
Symposium - International Astronomical Union, 1979 A way of treatment of evolution of common envelope binaries based only on the laws of conservation of energy and angular momentum is suggested. It is shown that the final configuration depends on masses of components and initial period of the system, and on parameters describing friction in the envelope, and mass loss by the system.
A. Tutukov, L. Yungelson
openaire +1 more source
Phosphatidylinositol 4‐kinase as a target of pathogens—friend or foe?
FEBS Letters, EarlyView.This graphical summary illustrates the roles of phosphatidylinositol 4‐kinases (PI4Ks). PI4Ks regulate key cellular processes and can be hijacked by pathogens, such as viruses, bacteria and parasites, to support their intracellular replication. Their dual role as essential host enzymes and pathogen cofactors makes them promising drug targets.
Ana C. Mendes +3 more
wiley +1 more source
Neutron-Capture Elements in the Double-Enhanced Star HE 1305-0007: a New s- and r-Process Paradigm
, 2007 The star HE 1305-0007 is a metal-poor double-enhanced star with metallicity [Fe/H] $=-2.0$, which is just at the upper limit of the metallicity for the observed double-enhanced stars. Using a parametric model, we find that almost all s-elements were made
Cui Dong-Nuan +6 more
core +1 more source
The newfound relationship between extrachromosomal DNAs and excised signal circles
FEBS Letters, EarlyView.Extrachromosomal DNAs (ecDNAs) contribute to the progression of many human cancers. In addition, circular DNA by‐products of V(D)J recombination, excised signal circles (ESCs), have roles in cancer progression but have largely been overlooked. In this Review, we explore the roles of ecDNAs and ESCs in cancer development, and highlight why these ...
Dylan Casey, Zeqian Gao, Joan Boyes
wiley +1 more source
Galaxies, 2018 The increase in discovered close binary central stars of planetary nebulae is leading to a sufficiently large sample to begin to make broader conclusions about the effect of close binary stars on common envelope evolution and planetary nebula formation ...
Todd Hillwig
doaj +1 more source
The Astrophysical Journal, 2023 The formation histories of compact binary mergers, especially stellar-mass binary black hole mergers, have recently come under increased scrutiny and revision.
Monica Gallegos-Garcia +2 more
doaj +1 more source