Results 1 to 10 of about 86,516 (190)

Plasma Astrophysics: Kinetic Processes in Solar and Stellar Coronae, Second Edition [PDF]

Eos, Transactions American Geophysical Union, 2003
A collision‐less plasma is an ionized fluid that is so hot and tenuous that interactions between individual particles are unimportant. In such a plasma, electric and magnetic fields mediate interactions among particles, and fundamental physics is addressed by kinetic theories that describe not only the spatial and temporal variations of the medium, but
S. Peter Gary
semanticscholar   +4 more sources

Advances in Solar-Stellar Astrophysics

Publications of the Astronomical Society of the Pacific, 1996
The discovery on stars of coronae and of X-ray emission from flares in the 1970's opened up the investigation of stellar activity. Solar-stellar astrophysics has now become a two-way street. The rich detail of the Sun provides a close-up view of physical phenomena, while the stellar observations provide a way to, in effect, vary the otherwise fixed ...
Bernhard Haisch, J. H. M. M. Schmitt
semanticscholar   +4 more sources

Starring roles in solar and stellar astrophysics [PDF]

Astronomy & Geophysics, 2006
S. Bowler
semanticscholar   +4 more sources

Solar, Stellar and Galactic Connections Between Particle Physics and Astrophysics [PDF]

, 2007
The very small and the very large are intimately connected in Nature. Particle physics and astrophysics meet in fundamental questions: the structure and evolution of stars; their end and how this is manifested; how we think galaxies are created from matter we have yet to discover and why we believe the most energetic particles cannot come from the ...
A. Carramiñana, F. S. Guzmán, Tonatiuh Matos   +2 more
openalex   +3 more sources

Simulations of stellar convection, pulsation and semiconvection [PDF]

, 2010
We report on modelling in stellar astrophysics with the ANTARES code. First, we describe properties of turbulence in solar granulation as seen in high-resolution calculations.
Bascoul, Buchler, Buchler, Eva Mundprecht, Florian Zaussinger, Friedrich Kupka, Hannes Grimm-Strele, Herbert J. Muthsam, Muthsam, Muthsam, Muthsam, Natalie Happenhofer, Smolec, Spruit   +13 more
core   +1 more source

Optimized gyrosynchrotron algorithms and fast codes [PDF]

, 2010
Gyrosynchrotron (GS) emission of charged particles spiraling in magnetic fields plays an exceptionally important role in astrophysics. In particular, this mechanism makes a dominant contribution to the continuum solar and stellar radio emissions. However,
Alexey A. Kuznetsov, Eidman, Eidman, Gregory D. Fleishman, Klein, Melrose   +5 more
core   +1 more source

The HARPS search for southern extra-solar planets [PDF]

Astronomy & Astrophysics, 2015
Context. Planetary companions of a fixed mass induce larger amplitude reflex motions around lower-mass stars, which helps make M dwarfs excellent targets for extra-solar planet searches. State of the art velocimeters with $\sim$1m/s stability can detect very low-mass planets out to the habitable zone of these stars.
Astudillo-Defru, N., Bonfils, X., Delfosse, X., Segransan, D., Forveille, T., Bouchy, F., Gillon, M., Lovis, C., Mayor, M., Neves, V., Pepe, F., Perrier, C., Queloz, D., Rojo, P., Santos, N.C., Udry, S.   +15 more
openaire   +8 more sources

Astrophysical uncertainties on stellar microlensing constraints on multisolar mass primordial black hole dark matter [PDF]

Physical Review D, 2017
There has recently been interest in multi-Solar mass Primordial Black Holes (PBHs) as a dark matter (DM) candidate. There are various microlensing, dynamical and accretion constraints on the abundance of PBHs in this mass range. Taken at face value these constraints exclude multi-Solar mass PBHs making up all of the DM for both delta-function and ...
openaire   +4 more sources

The Effect of Magnetic Variability on Stellar Angular Momentum Loss II: The Sun, 61 Cygni A, $\epsilon$ Eridani, $\xi$ Bootis A and $\tau$ Bootis A [PDF]

, 2019
The magnetic fields of low-mass stars are observed to be variable on decadal timescales, ranging in behaviour from cyclic to stochastic. The changing strength and geometry of the magnetic field should modify the efficiency of angular momentum loss by ...
Finley, Adam J., Matt, Sean P., See, Victor   +2 more
core   +2 more sources

Recent Advances in Modeling Stellar Interiors

, 2010
Advances in stellar interior modeling are being driven by new data from large-scale surveys and high-precision photometric and spectroscopic observations.
A. Baglin, A. Dotter, A. Dotter, A. Formicola, A. Grigahcéne, A. Miglio, A. Noels, A. Pigulski, A. Thoul, A.N. Cox, A.S. Brun, A.S. Brun, A.S. Brun, A.Y. Potekhin, C. Angulo, C. Paquette, C. Paquette, C.A. Iglesias, C.A. Meakin, C.W. Straka, D. Arnett, D. Arnett, D. Mao, D. Mihalas, D.B. Alexander, D.D. Clayton, D.S.P. Dearborn, E.E. Salpeter, E.G. Adelberger, F.J. Rogers, G.R. Caughlan, H. Hu, H. Hu, H.A. Kassim, I. Iben Jr., I. Soszyński, J. Christensen-Dalsgaard, J. Christensen-Dalsgaard, J. Daszyńska-Daszkiewicz, J. Daszyńska-Daszkiewicz, J. Ferguson, J.A. Guzik, J.A. Guzik, J.A. Guzik, J.M. Burgers, J.M. Matthews, Joyce Ann Guzik, K. Mussack, K. Ogata, L.H. Li, L.H. Li, M. Asplund, M. Asplund, M. Mocák, M. Mocák, M.J. Seaton, N. Gai, N. Grevesse, N. Itoh, N. Itoh, N. Itoh, N. Magee, N. Smith, N.J. Shaviv, N.R. Badnell, P. Kippenhahn, P. Lenz, P. Ventura, P.P. Eggleton, R. Gilliland, R.F. González, R.G. Deupree, R.G. Deupree, R.G. Deupree, R.G. Deupree, R.G. Deupree, R.G. Deupree, R.G. Deupree, Rodrǵuez-López, S. Basu, S. Cassisi, S. Cassisi, S. Randall, S. Theado, S. Turcotte, S. Turcotte, T. Zdravkov, T. Zdravkov, T. Zdravkov, W. Dappen, W.B. Hubbard   +90 more
core   +1 more source