Results 71 to 80 of about 412,693 (262)
The Fluctuation Theory of the Stellar Mass Loss [PDF]
International Astronomical Union Colloquium, 1981 That we cannot give a justification – or sufficient reasons – for our guesses does not mean that we may not have guessed the truth.K.R. PopperIf studied in detail, the mass flows from the stars appear to be variable. “Mere inspection of solar wind data reveals large variations on a time scale of several days” (Hundhausen, 1972).
openaire +1 more source
Neglecting the porosity of hot-star winds can lead to underestimating mass-loss rates
, 2007 Context: The mass-loss rate is a key parameter of massive stars. Adequate stellar atmosphere models are required for spectral analyses and mass-loss determinations.
Feldmeier, A. +2 more
core +1 more source
Evidence that Mass Loss on the Red Giant Branch Decreases with Metallicity
The Astrophysical JournalMass loss on the red giant branch (RGB) influences stellar evolution, properties of stellar populations, and Galactic chemical enrichment, yet remains poorly constrained observationally. Current models provide limited insight into how stellar properties,
Yaguang Li
doaj +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
, 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
Mass-loss predictions and stellar masses of early-type stars [PDF]
Symposium - International Astronomical Union, 2003 We show that the stellar masses implied by our predictions of the wind properties of massive stars are in agreement with masses derived from evolution theory and from direct measurements using spectroscopic binaries, contrary to previous attempts to derive masses from wind theory.
de Koter, A., Vink, J.S.
openaire +3 more sources
Shooting for the Stars: Jet-mode Feedback and AGN Jet Deceleration from Stellar Mass Loading
The Astrophysical JournalActive Galactic Nucleus (AGN) jets are thought to be vital ingredients in galaxy evolution through the action of kinetic feedback; however, how narrow, relativistic outflows couple to galaxies remains an open question.
Talia M. O’Shea +4 more
doaj +1 more source
Thresholds for the Dust Driven Mass Loss from C-rich AGB Stars
, 2007 It is well established that mass loss from AGB stars due to dust driven winds cannot be arbitrarily low. We model the mass loss from carbon rich AGB stars using detailed frequency-dependent radiation hydrodynamics including dust formation.
Hoefner, Susanne +2 more
core +1 more source
Mass loss from dynamically unstable stellar envelopes
The Astrophysical Journal, 1978 Results of an extensive study of the dynamical stability and dynamical behavior of envelopes of red giants are given. The region on the luminosity (L) -effective temperature (T/sub eff/) -plane within which static, thermally equilibrated envelopes are dynamically unstable is reanalyzed and is found to be more complex than has hitherto been thought. The
Y. Tuchman, N. Sack, Z. Barkat
openaire +1 more source
GalaxiesThe red and yellow hypergiants are a rare and important phase in the evolution of the most massive stars that can reach the cool part of the HR Diagram.
Terry Jones
doaj +1 more source