Results 31 to 40 of about 3,875 (223)

Latitudinal Variation of the Solar Photospheric Intensity [PDF]

The Astrophysical Journal, 2008
24 pages, 8 figs, accepted in ...
Rast, Mark P., Ortiz, Ada, Meisner, Randle W.   +2 more
openaire   +2 more sources

Simulations of magneto-convection in the solar photosphere

, 2004
We have developed a 3D magnetohydrodynamics simulation code for applications in the solar convection zone and photosphere. The code includes a non-local and non-grey radiative transfer module and takes into account the effects of partial ionization.
Shelyag, S., Linde, T., Vögler, Alexander, Emonet, Thierry, Linde, Timur, M. Schüssler, Cattaneo, F., Emonet, T., Vögler, A., T. Linde, Schüssler, M., Cattaneo, Fausto, T. Emonet, Shelyag, Sergiy, Schüssler, Manfred, F. Cattaneo, A. Vögler, S. Shelyag   +17 more
core   +1 more source

STOCHASTIC COUPLING OF SOLAR PHOTOSPHERE AND CORONA [PDF]

The Astrophysical Journal, 2013
36 pageS, 11 figures, 3 ...
Uritsky, Vadim M., Davila, Joseph M., Ofman, Leon, Coyner, Aaron J.   +3 more
openaire   +2 more sources

Turbulence in the Solar Photosphere [PDF]

Space Science Reviews, 2001
16 pages, 1 ...
openaire   +2 more sources

MAGNETOHYDRODYNAMICS OF THE WEAKLY IONIZED SOLAR PHOTOSPHERE [PDF]

The Astrophysical Journal, 2012
We investigate the importance of ambipolar diffusion and Hall currents for high-resolution comprehensive ('realistic') photospheric simulations. To do so we extended the radiative magnetohydrodynamics code \emph{MURaM} to use the generalized Ohm's law under the assumption of local thermodynamic equilibrium.
Cheung, M., Cameron, R.
openaire   +3 more sources

Investigation of Phase Shift and Travel Time of Acoustic Waves in the Lower Solar Atmosphere Using Multiheight Velocities

The Astrophysical Journal
We report and discuss the phase shift and phase travel time of low-frequency ( ν < 5.0 mHz) acoustic waves estimated within the photosphere and photosphere–chromosphere interface regions, utilizing multiheight velocities in the quiet Sun.
Hirdesh Kumar, Brajesh Kumar, Shibu K. Mathew, A. Raja Bayanna, S. P. Rajaguru   +4 more
doaj   +1 more source

Solar and stellar photospheric abundances

Living Reviews in Solar Physics, 2016
The determination of photospheric abundances in late-type stars from spectroscopic observations is a well-established field, built on solid theoretical foundations. Improving those foundations to refine the accuracy of the inferred abundances has proven challenging, but progress has been made.
openaire   +3 more sources

Simulated magnetic flows in the solar photosphere [PDF]

Astronomy & Astrophysics, 2015
Recent Sunrise/IMaX observations have revealed the existence of supersonic magnetic flows. Our aim is to determine the origin of such flows by using realistic MHD simulations. We simulate cancellation and emergence of magnetic flux through the solar photosphere. Our first numerical experiment starts with magnetic field of both polarities.
Danilovic, S., Cameron, R., Solanki, S.
openaire   +3 more sources

Noble gases and nitrogen in material from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty, L. Zimmermann, E. Füri, D. V. Bekaert, J. J. Barnes, A. N. Nguyen, H. C. Connolly, D. S. Lauretta   +7 more
wiley   +1 more source

A High-resolution, Inversion-based Synoptic Study of Solar Granulation

The Astrophysical Journal
The convectively driven, weakly magnetized regions of the solar photosphere dominate the Sun’s surface at any given time, but the temporal variations of these quiet regions of the photosphere throughout the solar cycle are still not well known.
James W. Crowley, Ivan Milić, Gianna Cauzzi, Kevin Reardon   +3 more
doaj   +1 more source