Results 61 to 70 of about 726,750 (238)
The role of stellar collisions for the formation of massive stars [PDF]
Monthly Notices of the Royal Astronomical Society, 2011 We use direct N-body simulations of gas embedded star clusters to study the importance of stellar collisions for the formation and mass accretion history of high-mass stars. Our clusters start in virial equilibrium as a mix of gas and proto-stars. Proto-stars then accrete matter using different mass accretion rates and the amount of gas is reduced in ...
Ralf S. Klessen +2 more
openaire +5 more sources
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. +3 more
core +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 +76 more
core +1 more source
Mixing in massive stellar mergers [PDF]
, 2007 The early evolution of dense star clusters is possibly dominated by close interactions between stars, and physical collisions between stars may occur quite frequently.
Gaburov, E. +2 more
core +5 more sources
Three-dimensional simulations of clump formation in stellar wind collisions [PDF]
Monthly notices of the Royal Astronomical Society, 2019 The inner parsec of our Galaxy contains tens of Wolf–Rayet stars whose powerful outflows are constantly interacting while filling the region with hot, diffuse plasma. Theoretical models have shown that, in some cases, the collision of stellar winds can
Diego Calder'on +5 more
semanticscholar +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 +3 more
doaj +1 more source
, 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
On the onset of runaway stellar collisions in dense star clusters: I. Dynamics of the first collision [PDF]
, 2007 We study the circumstances under which first collisions occur in young and dense star clusters. The initial conditions for our direct N-body simulations are chosen such that the clusters experience core collapse within a few million years, before the ...
E. Gaburov +3 more
semanticscholar +1 more source
Distinguishing circumstellar from stellar photometric variability in Eta Carinae [PDF]
Monthly notices of the Royal Astronomical Society, 2019 The interacting binary Eta Carinae remains one of the most enigmatic massive stars in our Galaxy despite over four centuries of observations. In this work, its light curve from the ultraviolet to the near-infrared is analysed using spatially resolved HST
A. Damineli +16 more
semanticscholar +1 more source
Formation of Massive Star Clusters by Fast H i Gas Collision [PDF]
, 2020 Young massive clusters (YMCs) are dense aggregates of young stars, which are essential to galaxy evolution, owing to their ultraviolet radiation, stellar winds, and supernovae. The typical mass and radius of YMCs are M ∼ 104 M⊙ and R ∼ 1 pc, respectively,
Ryunosuke Maeda, T. Inoue, Y. Fukui
semanticscholar +1 more source