Results 41 to 50 of about 375,358 (260)

On the nature of massive helium star winds and Wolf–Rayet-type mass-loss [PDF]

open access: yesMonthly 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

XUV-driven mass loss from extrasolar giant planets orbiting active stars [PDF]

open access: yes, 2014
Upper atmospheres of Hot Jupiters are subject to extreme radiation conditions that can result in rapid atmospheric escape. The composition and structure of the upper atmospheres of these planets are affected by the high-energy spectrum of the host star ...
J. Chadney   +4 more
semanticscholar   +1 more source

Mass Loss and Very Low-metallicity Stars [PDF]

open access: yesAIP Conference Proceedings, 2007
8 pages, 3 figures, to appear in the proceedings of the conference on "Unsolved Problems in Stellar Physics", Cambridge, 2-6 July ...
Raphael Hirschi   +8 more
openaire   +2 more sources

Mass loss of stars on the asymptotic giant branch

open access: yes, 2018
As low- and intermediate-mass stars reach the asymptotic giant branch (AGB), they have developed into intriguing and complex objects that are major players in the cosmic gas/dust cycle.
Susanne Höfner, H. Olofsson
semanticscholar   +1 more source

EVOLUTION OF THERMALLY PULSING ASYMPTOTIC GIANT BRANCH STARS. IV. CONSTRAINING MASS LOSS AND LIFETIMES OF LOW MASS, LOW METALLICITY AGB STARS [PDF]

open access: yes, 2014
The evolution and lifetimes of thermally pulsating asymptotic giant branch (TP-AGB) stars suffer from significant uncertainties. In this work, we analyze the numbers and luminosity functions of TP-AGB stars in six quiescent, low metallicity ([Fe/H] ≲ −0 ...
P. Rosenfield   +9 more
semanticscholar   +1 more source

First stars. II. Evolution with mass loss [PDF]

open access: yesAstrophysics and Space Science, 2011
The first stars are assumed to be predominantly massive. Although, due to the low initial abundances of heavy elements the line-driven stellar winds are supposed to be inefficient in the first stars, these stars may loose a significant amount of their initial mass by other mechanisms.
Bahena, David, Hadrava, Petr
openaire   +2 more sources

THE MASS-LOSS RETURN FROM EVOLVED STARS TO THE LARGE MAGELLANIC CLOUD. IV. CONSTRUCTION AND VALIDATION OF A GRID OF MODELS FOR OXYGEN-RICH AGB STARS, RED SUPERGIANTS, AND EXTREME AGB STARS [PDF]

open access: yes, 2014
To measure the mass loss from dusty oxygen-rich (O-rich) evolved stars in the Large Magellanic Cloud (LMC), we have constructed a grid of models of spherically symmetric dust shells around stars with constant mass-loss rates using 2Dust.
B. Sargent, S. Srinivasan, M. Meixner
semanticscholar   +1 more source

Mass loss in main-sequence B stars [PDF]

open access: yes, 2014
We calculate radiatively driven wind models of main-sequence B stars and provide the wind mass-loss rates and terminal velocities. The main-sequence mass-loss rate strongly depends on the stellar effective temperature.
J. Krtička
semanticscholar   +1 more source

Solid Pseudopapillary Neoplasm of the Pancreas in Children and Adolescents: Expert Recommendations

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Solid pseudopapillary neoplasm of the pancreas (SPN) is a rare low‐grade malignant exocrine pancreatic tumor, mostly discovered during the second decade of life in females, with a very good prognosis, provided microscopically complete surgical excision is achieved.
Sabine Irtan   +18 more
wiley   +1 more source

Luminosities and mass-loss rates of Local Group AGB stars and Red Supergiants [PDF]

open access: yes, 2014
We aim to investigate mass loss and luminosity in a large sample of evolved stars in several Local Group galaxies with a variety of metalliticies and star-formation histories: the Small and Large Magellanic Cloud, and the Fornax, Carina, and Sculptor ...
M. Groenewegen, G. Sloan
semanticscholar   +1 more source

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