Results 91 to 100 of about 412,693 (262)

Orbital Separation Amplification in Fragile Binaries with Evolved Components

, 2011
The secular stellar mass-loss causes an amplification of the orbital separation in fragile, common proper motion, binary systems with separations of the order of 1000 A.U.
Anderson, Anderson, Antonov, Burgasser, Chabrier, Chabrier, Chanamè, Chanamè, Charbonnel, D. Valls-Gabaud, Docobo, Dommanget, Eggen, Eggleton, Greenstein, Hadjidemetriou, Halbwachs, Hawley, Heggie, Heggie, Hernandez, Hills, Hurley, Hurley, Jiang, Johnston, K.B. Johnston, Kawka, Kroupa, Kruszewski, Kurucz, Longhitano, Lucy, Mathieu, Mowlavi, Oswalt, Paczynski, Pols, Poveda, Quinn, Rahoma, Reid, Reid, Robin, Schaller, Sesar, Shu, Sion, Stephens, T.D. Oswalt, Trimble, Trimble, Valls-Gabaud, Van Dessel, Verhulst, Wasserman, Wasserman, Weinberg, Willems, Wood, Zhao, Zinnecker, Öpik   +62 more
core   +2 more sources

Simulated Coronal Mass Ejections on a Young Solar-type Star and the Associated Instantaneous Angular Momentum Loss

The Astrophysical Journal
Coronal mass ejections (CMEs) on stars can change the stars’ magnetic field configurations and mass-loss rates during the eruption and propagation and therefore, may affect the stars’ rotation properties on long timescales.
Yu Xu, Julián D. Alvarado-Gómez, Hui Tian, Katja Poppenhäger, Gustavo Guerrero, Xianyu Liu   +5 more
doaj   +1 more source

The Coronal Structure of AB Doradus

, 2010
We perform a numerical simulation of the corona of the young, rapidly rotating K0 dwarf AB Doradus using a global MHD model. The model is driven by a surface map of the radial magnetic field constructed using Zeeman-Doppler Imaging.
Barnes, Cohen, Cohen, Cohen, Donati, Donati, G. A. J. Hussain, García-Alvarez, Guirado, Hussain, Hussain, J. J. Drake, Krishnamurthi, Kuerster, Luhman, López-Santiago, Maggio, Matranga, Mestel, O. Cohen, Pakull, Schatzmann, Schmitt, T. I. Gombosi, V. L. Kashyap, Vilhu, Wood, Wood, Zuckerman   +28 more
core   +1 more source

3-D radiative transfer in clumped hot star winds I. Influence of clumping on the resonance line formation

, 2012
The true mass-loss rates from massive stars are important for many branches of astrophysics. For the correct modeling of the resonance lines, which are among the key diagnostics of stellar mass-loss, the stellar wind clumping turned out to be very ...
A. Feldmeier, Avery, B. Šurlan, Bouret, Bouret, Box, Caroff, Castor, Cranmer, Dessart, Dessart, Eversberg, Feldmeier, Feldmeier, Feldmeier, Feldmeier, Fullerton, Hamann, Hamann, Hamann, Hamann, Hamann, Hillier, J. Kubát, Korčáková, Korčáková, Krtička, Krtička, L. M. Oskinova, Lobel, Lucy, Lucy, Lucy, Lépine, Lépine, Maeder, Markova, Muijres, Mullan, Oskinova, Oskinova, Oskinova, Owocki, Owocki, Owocki, Pauldrach, Prinja, Prinja, Prinja, Puls, Puls, Runacres, Sundqvist, Sundqvist, W.-R. Hamann, Waldron, Whitney, Zsargó   +57 more
core   +1 more source

Modeling the Progenitor Stars of Observed Type IIP Supernovae

The Astrophysical Journal
Type IIP supernovae (SNe IIP) are thought to originate from the explosion of massive stars >10 M _⊙ . Their luminosity is primarily powered by the explosion energy and the radioactive decay energy of ^56 Co, with the photosphere location regulated by ...
Kai-An You, Ke-Jung Chen, Yen-Chen Pan, Sung-Han Tsai, Po-Sheng Ou   +4 more
doaj   +1 more source

The Real-Time Evolution of V4334 Sgr

Galaxies, 2018
V4334 Sgr (Sakurai’s object) is an enigmatic evolved star that underwent a very late thermal pulse a few years before its discovery in 1996. It ejected a new hydrogen-deficient nebula in the process. The source has been observed continuously since,
Peter A. M. van Hoof, Stefan Kimeswenger, Griet C. Van de Steene, Adam Avison, Albert A. Zijlstra, Lizette Guzman-Ramirez, Falk Herwig, Marcin Hajduk   +7 more
doaj   +1 more source

Effects of tidally enhanced stellar wind on the horizontal branch morphology of globular clusters

, 2012
Metallicity is the first parameter to influence the horizontal branch (HB) morphology of globular clusters (GCs). It has been found, however, that some other parameters may also play an important role in affecting the morphology.
Chen, Xue-Fei, Han, Z., Lei, Zhen-Xin, Zhang, Feng-Hui   +3 more
core   +1 more source

Observations of Extremely Metal-poor O Stars: Weak Winds and Constraints for Evolution Models

The Astrophysical Journal
Metal-poor massive stars drive the evolution of low-mass galaxies, both locally and at high redshift. However, quantifying the feedback they impart to their local surroundings remains uncertain because models of stellar evolution, mass loss, and ionizing
O. Grace Telford, John Chisholm, Andreas A. C. Sander, Varsha Ramachandran, Kristen B. W. McQuinn, Danielle A. Berg   +5 more
doaj   +1 more source

On The Maximum Mass of Stellar Black Holes

, 2010
We present the spectrum of compact object masses: neutron stars and black holes that originate from single stars in different environments. In particular, we calculate the dependence of maximum black hole mass on metallicity and on some specific wind ...
Ashley Ruiter, Belczynski, Belczynski, Belczynski, Bulik, Casares, Cassisi, Chris L. Fryer, Francesca Valsecchi, Fryer, Fryer, Gies, Hamann, Heger, Heger, Herrero, Jarrod R. Hurley, Jorick S. Vink, King, Krzysztof Belczynski, Kudritzki, Kudritzki, Limongi, Madhusudhan, Massey, Miller, Miller, Nieuwenhuijzen, Nugis, Ohsuga, Orosz, Pakull, Podsiadlowski, Prestwich, Silverman, Smith, Tomasz Bulik, Tout, Vazquez, Zhang, Ziolkowski   +40 more
core   +2 more sources

COLOR–MAGNITUDE RELATIONS WITHIN GLOBULAR CLUSTER SYSTEMS OF GIANT ELLIPTICAL GALAXIES: THE EFFECTS OF GLOBULAR CLUSTER MASS LOSS AND THE STELLAR INITIAL MASS FUNCTION [PDF]

, 2013
Several recent studies have provided evidence for a “bottom-heavy” stellar initial mass function (IMF) in massive elliptical galaxies. Here we investigate the influence of the IMF shape on the recently discovered color–magnitude relation (CMR) among ...
P. Goudfrooij, J. Kruijssen
semanticscholar   +1 more source