Results 21 to 30 of about 1,846,404 (321)
Probing the mass-loss history of AGB and red supergiant stars from CO rotational line profiles - II. CO line survey of evolved stars: derivation of mass-loss rate formulae [PDF]
, 2010 We aim to (1) set up simple and general analytical expressions to estimate mass-loss rates of evolved stars, and (2) from those calculate estimates for the mass-loss rates of asymptotic giant branch (AGB), red supergiant (RSG), and yellow hypergiant ...
A. de Koter +108 more
core +2 more sources
Binary Interactions, High-Speed Outflows and Dusty Disks during the AGB-To-PN Transition
Galaxies, 2018 It is widely believed that the dramatic transformation of the spherical outflows of AGB stars into the extreme aspherical geometries seen during the planetary nebula (PN) phase is linked to binarity and driven by the associated production of fast jets ...
Raghvendra Sahai
doaj +1 more source
Removal of Hot Saturns in Mass–Radius Plane by Runaway Mass Loss
The Astrophysical Journal Letters, 2023 The hot Saturn population exhibits a boundary in mass–radius space, such that no planets are observed at a density less than ∼0.1 g cm ^−3 . Yet, planet interior structure models can readily construct such objects as the natural result of radius ...
Daniel P. Thorngren +2 more
doaj +1 more source
A Systematic Survey of the Effects of Wind Mass Loss Algorithms on the Evolution of Single Massive Stars [PDF]
, 2017 Mass loss is a key uncertainty in the evolution of massive stars. Stellar evolution calculations must employ parametric algorithms for mass loss, and usually only include stellar winds.
de Mink, Selma E. +3 more
core +2 more sources
Symbiotic Stars: Observations Confront Theory
Open Astronomy, 2012 In this paper, I present and discuss some recent observational results which may have important implications for our understanding of late phases of binary evolution.
Mikołajewska J.
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Simulations of the Formation and X-Ray Emission from Hot Bubbles in Planetary Nebulae
Galaxies, 2018 High-quality X-ray observations of planetary nebulae (PNe) have demonstrated that the X-ray-emitting gas in their hot bubbles have temperatures in the small range TX = (1 − 3) × 106 K.
Jesus A. Toalá, S. Jane Arthur
doaj +1 more source
International Astronomical Union Colloquium, 1981 High dispersion spectrograms of α Ori are obtained. Several strong absorption lines which have circumstellar components are measured. Assuming the plane-parallel envelope and thermal equilibrium, the mass loss rate is estimated as 1x10-6 Mʘ/yr.To obtain the mass loss rate of red giant stars is very important in connection with the study of the stellar ...
T. Tanabe, F. Kamijo
openaire +1 more source
News on the X-ray emission from hot subdwarf stars
Open Astronomy, 2017 In latest years, the high sensitivity of the instruments on-board the XMM-Newton and Chandra satellites allowed us to explore the properties of the X-ray emission from hot subdwarf stars.
Palombara Nicola La, Mereghetti Sandro
doaj +1 more source
Mass Loss and Penetration Depth of Hypervelocity Projectiles
Shock and Vibration, 2021 Numerous investigations recorded a dramatic decrease in penetration depth at hypervelocity. The decrease is due to the severe mass loss of the projectile. The mechanics of mass loss are complicated, so the entirely theoretical model is still absent.
Tianhan Xu +4 more
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Mongolian Journal of Chemistry, 2016 The technical characteristics, elemental composition of the organic and mineral matters, ash melting behaviors and carbonization and gasification reactivities of coals from Baganuur and Naryn sukhait deposits were investigated.
A. Ariunaa +9 more
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