Results 71 to 80 of about 409,343 (365)
Pulsation Period Change & Classical Cepheids: Probing the Details of Stellar Evolution
, 2014 Measurements of secular period change probe real-time stellar evolution of classical Cepheids making these measurements powerful constraints for stellar evolution models, especially when coupled with interferometric measurements. In this work, we present
Bisol, Alexandra C. +3 more
core +1 more source
The Impact of Hot Jupiters on the Spin-down of their Host Stars [PDF]
, 2010 We present a numerical Magnetohydrodynamic (MHD) study of the dependence of stellar mass and angular momentum- loss rates on the orbital distance to close-in giant planets.
Cohen +11 more
core +1 more source
The transition mass-loss rate: Calibrating the role of line-driven winds in massive star evolution
, 2012 A debate has arisen regarding the importance of stationary versus eruptive mass loss for massive star evolution. The reason is that stellar winds have been found to be clumped, which results in the reduction of unclumped empirical mass-loss rates.
Gräfener, Götz, Vink, Jorick S.
core +1 more source
Evidence for the Strong Effect of Gas Removal on the Internal Dynamics of Young Stellar Clusters [PDF]
, 2006 We present detailed luminosity profiles of the young massive clusters M82-F, NGC 1569-A, and NGC 1705-1 which show significant departures from equilibrium (King and EFF) profiles.
Kroupa, N. Bastian, S. P. Goodwin
core +2 more sources
The initial/final mass relation for stellar evolution with mass loss [PDF]
International Astronomical Union Colloquium, 1981 The relation between initial and final masses is discussed under consideration of changing theoretical concepts and new empirical data on masses of white dwarfs and nuclei of planetary nebulae. It is concluded that presently adopted schemes of evolution need revision, and that no universal relation exists.The strongest evidence for large amounts of ...
openaire +1 more source
New predictions for radiation-driven, steady-state mass-loss and wind-momentum from hot, massive stars [PDF]
Astronomy & Astrophysics, 2020 Context. Reliable predictions of mass-loss rates are important for massive-star evolution computations. Aims. We aim to provide predictions for mass-loss rates and wind-momentum rates of O-type stars, while carefully studying the behaviour of these winds
R. Björklund +3 more
semanticscholar +1 more source
Detection of mass loss in stellar chromospheres
The Astrophysical Journal, 1980 IUE observations of 47 cool giants have been made in a search for the onset of expansion in the Mg II h and k emission cores. It is found that, in a statistical sense, the longward emission peak becomes dominant above a velocity dividing line in the H-R diagram, which lies close to a temperature dividing line reported by Linsky and Haisch (1979).
R. E. Stencel, D. J. Mullan
openaire +1 more source
On the nature of massive helium star winds and Wolf–Rayet-type mass-loss [PDF]
Monthly notices of the Royal Astronomical Society, 2020 The mass-loss rates of massive helium stars are one of the major uncertainties in modern astrophysics. Regardless of whether they were stripped by a binary companion or managed to peel off their outer layers by themselves, the influence and final fate ...
A. Sander, J. Vink
semanticscholar +1 more source
, 2014 Close-in planets are in jeopardy as their host stars evolve off the main sequence to the subgiant and red giant phases. In this paper, we explore the influences of the stellar mass (in the range 1.5--2\Mso ), mass-loss prescription, planet mass (from ...
Livio, Mario +3 more
core +1 more source
Stellar mass loss, rotation and the chemical enrichment of early-type galaxies [PDF]
, 2009 We present a comparison between the [Ca,C,N/Fe]-mass relations observed in local spheroids and the results of a chemical evolution model which already successfully reproduces the [Mg/Fe]-mass and the [Fe/H]-mass relations in these systems.
A. Pipino +3 more
semanticscholar +1 more source