Results 181 to 190 of about 5,203 (216)
Dynamics of the solar chromosphere
Astronomy and Astrophysics, 2001 We analyze oscillations in the solar atmosphere using image sequences from the Transition Region and Coronal Explorer (TRACE) in three ultraviolet passbands which sample the upper solar photosphere and low chromosphere.
T D Tarbell, R A Shine, B W Lites
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Diffusive fractionation in the chromosphere
Space Science Reviews, 1994A new mechanism for the FIP fractionation in the solar wind in the form of a stationary diffusion model is proposed. It is based on a weakly stratified chromospheric layer of constant density and temperature, permeated everywhere by ionizing photons and a homogeneous magnetic field. Our model does not invoke any particular geometry or special set up of
von Steiger, R., Marsch, E.
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Chromospheric flares or chromospheric aurorae?
Space Science Reviews, 1975This paper discusses some of the well-documented flare phenomena and possible analogies with magnetospheric substorm phenomena. Such analogies do exist, but also important differences. The combination of forces from magnetospheric and solar physicists will bring us closer to the understanding of these nearby examples of unstable cosmic plasmas.
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The Dynamics of Chromospheric Spicules
Space Science Reviews, 1994We present the observational results on chromospheric spicules obtained at the Sayan observatory 50 cm coronograph. To investigate the evolution of chromospheric spicules, we analysed spicule spectra of strong chromospheric lines measured simultaneously at three altitudes above the solar limb during 5–60 min with a time resolution of 10 to 20 s.
P. G. Papushev, R. T. Salakhutdinov
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Science (New York, N.Y.), 1966
Besides being of intrinsic interest, these outer stellar envelopes provide very useful astrophysical tools.
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Besides being of intrinsic interest, these outer stellar envelopes provide very useful astrophysical tools.
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Sequential chromospheric brightenings: The case for chromospheric evaporation
Advances in Space Research, 2007Abstract Sequential chromospheric brightenings (SCBs [Balasubramaniam, K.S., Pevtsov, A.A., Neidig, D.F., Cliver, E.W., Thompson, B.J., Young, C.A., Martin, S.F., & Kiplinger, A., 630, 1160, 2005.]) are observed in conjunction with some strong solar flares, prominence eruptions, and coronal mass ejections (CMEs).
Alexei A. Pevtsov +2 more
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2019
Modeling of the solar chromosphere is challenging and the spectral diagnostic features formed in the chromosphere are few and difficult to interpret, and typically they are neither formed in the optically thin regime (unlike the corona), nor are they in the local thermodynamic equilibrium (LTE) (e.g., see reviews by Carlsson 2007, 2008).
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Modeling of the solar chromosphere is challenging and the spectral diagnostic features formed in the chromosphere are few and difficult to interpret, and typically they are neither formed in the optically thin regime (unlike the corona), nor are they in the local thermodynamic equilibrium (LTE) (e.g., see reviews by Carlsson 2007, 2008).
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Spicules and downflows in the solar chromosphere
Astronomy and Astrophysics, 2021Vasco Henriques, Jayant Joshi
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