Results 31 to 40 of about 15,079 (225)

Chromospheric Seismology [PDF]

Symposium - International Astronomical Union, 1988
The aim of the present study is to examine whether seismologic diagnostic techniques may be used to improve the models of the solar chromosphere. We are mainly concerned by oscillations observed in the cores of strong lines such as the resonance lines of Ca II or Mg II. It is intuitive, and confirmed by numerical simulations (Gouttebroze and Leibacher,
openaire   +1 more source

Stellar Chromospheres [PDF]

International Astronomical Union Colloquium, 1980
Important progress in our understanding of stellar chromospheres has occurred in the past few years as a result of new observations, developments in spectral line formation theory, and the application of that theory to the construction of detailed model chromospheres.
openaire   +1 more source

Multiwavelength studies of MHD waves in the solar chromosphere: An overview of recent results [PDF]

, 2015
The chromosphere is a thin layer of the solar atmosphere that bridges the relatively cool photosphere and the intensely heated transition region and corona. Compressible and incompressible waves propagating through the chromosphere can supply significant
A. Andić, A. Asai, A. Berlicki, A. Fossum, A. Fossum, A. Fossum, A. Hillier, A. Lagg, A. López Ariste, A. Pietarila, A. Vecchio, A. Verdini, A. Vourlidas, A. Williamson, A.A. Ballegooijen van, A.A. Georgakilas, A.H. Nye, A.H. Nye, A.K. Srivastava, A.K. Srivastava, A.K. Srivastava, A.M. Title, A.R. Choudhuri, B. Beeck, B. Pontieu De, B. Pontieu De, B. Pontieu De, B. Pontieu De, B. Pontieu De, B. Pontieu De, B. Roberts, B. Roberts, B. Roberts, B. Roberts, B. Schmieder, B.I. Demchenko, B.N. Handy, B.W. Hindman, B.W. Lites, B.W. Lites, B.W. Lites, C. Beck, C. Beck, C. Beck, C. Beck, C. Beck, C. Sawyer, C. Torrence, C.A. Mendoza-Briceño, C.E. Deforest, D. B. Jess, D. Berghmans, D. Kiselman, D. Kuridze, D. Kuridze, D. Müller, D. Prakapavičius, D. Utz, D. Yuan, D. Yuan, D. Yuan, D.-Y. Chou, D.B. Jess, D.B. Jess, D.B. Jess, D.B. Jess, D.B. Jess, D.B. Jess, D.B. Jess, D.B. Jess, D.B. Jess, D.B. Jess, D.B. Jess, D.B. Jess, D.B. King, D.E. Osterbrock, D.H. Sekse, D.H. Sekse, D.J. Galloway, D.S. Bloomfield, D.S. Bloomfield, D.T. Woods, E. Antonucci, E. Antonucci, E. Caffau, E. Khomenko, E. Priest, E. Scullion, E. Tavabi, E. Verwichte, E. Verwichte, E.B. Christopoulou, E.B. Christopoulou, E.N. Parker, E.R. Priest, E.R. Priest, F. Baudin, F. Cavallini, F. Dröoge, F. Wöger, F.-L. Deubner, F.-L. Deubner, F.-L. Deubner, G. Cauzzi, G. Cauzzi, G. Kiddie, G. Kopp, G. Verth, G. Verth, G. Verth, G. Verth, G. Verth, G. Verth, G. Vigeesh, G.B. Scharmer, G.B. Scharmer, G.B. Scharmer, G.L. Withbroe, G.M. Nikol’Skii, G.R. Athay, H. Alfvén, H. Balthasar, H. Balthasar, H. Ebadi, H. Frisch, H. Isobe, H. Isobe, H. Nakajima, H. Socas-Navarro, H. Uitenbroek, H. Uitenbroek, H. Uitenbroek, H. Uitenbroek, H. Zirin, H. Zirin, H. Zirin, H. Zirin, H.A. Hill, H.C. Spruit, H.C. Spruit, I. Ballai, I. Baumann, I. Dorotovič, I. Dorotovič, I. Giagkiozis, I. Kontogiannis, I. Lipartito, I. Moortel De, I. Moortel De, I. Moortel De, I. Moortel De, I. Moortel De, I. Moortel De, I. Rüedi, J. Andries, J. Cruz Rodríguez de la, J. He, J. Heyvaerts, J. Hirzberger, J. Jackiewicz, J. Leenaarts, J. Leenaarts, J. Sanchez Almeida, J. Schou, J. Terradas, J. Terradas, J. Theurer, J. Trujillo Bueno, J.-P. Delaboudinière, J.-S. He, J.A. Bonet, J.A. Klimchuk, J.A. Klimchuk, J.A. Klimchuk, J.A. McLaughlin, J.C. Hall, J.H. Thomas, J.H.M.J. Bruls, J.K. Lawrence, J.M. Beckers, J.M. Beckers, J.M. Beckers, J.M. Krijger, J.M. Pasachoff, J.O. Stenflo, J.P.H. Goedbloed, J.R. Lemen, J.V. Hollweg, K. Bennett, K. Muglach, K. Nagashima, K. Shibata, K. Tziotziou, K. Tziotziou, K.-D. Pahlke, K.-S. Cho, K.-S. Cho, K.D. Leka, K.G. Puschmann, K.P. Reardon, K.V. Parchevsky, L. Biermann, L. Ofman, L. Ofman, L. Ofman, L. Ofman, L. Ofman, L. Rouppe van der Voort, L.H.M. Rouppe van der Voort, L.P. Chitta, L.S. Anderson, L.W. Acton, M. Carlsson, M. Carlsson, M. Carlsson, M. Carlsson, M. Carlsson, M. Collados, M. Cuntz, M. Gabriel, M. Goossens, M. Goossens, M. Goossens, M. Goossens, M. Goossens, M. Goossens, M. Goossens, M. Knoelker, M. Kopecký, M. Lazrek, M. Luna, M. Luna, M. Luna-Cardozo, M. Makita, M. Mathioudakis, M. Noort van, M. Noort van, M. Schwarzschild, M. Sobotka, M. Sobotka, M. Sobotka, M. Stangalini, M. Stangalini, M. Stangalini, M. Uexkuell von, M.G. Moreels, M.G. Moreels, M.J. Aschwanden, M.J. Aschwanden, M.J. Aschwanden, M.J. Aschwanden, M.J. Penn, M.L. Goodman, M.S. Madjarska, M.S. Marsh, M.S. Ruderman, M.S. Ruderman, M.S. Ruderman, N. Bello González, N. Bello González, N. Bello González, N. Bello González, N. Mein, N. Mein, N.-E. Raouafi, N.E. Huang, N.I. Kobanov, N.I. Kobanov, N.I. Kobanov, N.I. Kobanov, N.I. Kobanov, N.I. Kobanov, N.I. Kobanov, N.I. Kobanov, O. Steiner, O.R. White, O.R. White, P. Barthol, P. Foukal, P. Goldreich, P. Goldreich, P. Sütterlin, P. Sütterlin, P. Sütterlin, P. Sütterlin, P. Testa, P. Ulmschneider, P. Ulmschneider, P.H. Keys, P.H. Keys, P.H. Keys, P.J. Crockett, P.J. Crockett, P.M. Edwin, P.S. Cally, R. Cameron, R. Centeno, R. Centeno, R. Erdélyi, R. Erdélyi, R. Erdélyi, R. Erdélyi, R. Erdélyi, R. Erdélyi, R. Erdélyi, R. Erdélyi, R. J. Morton, R. Keppens, R. Moll, R. Morton, R. Soler, R. Soler, R. Soler, R.B. Dunn, R.B. Dunn, R.B. Leighton, R.B. Leighton, R.F. Howard, R.G. Athay, R.G. Athay, R.G. Giovanelli, R.I. Klein, R.I. Klein, R.J. Morton, R.J. Morton, R.J. Morton, R.J. Rutten, R.J. Rutten, R.J. Rutten, R.J. Rutten, R.K. Ulrich, R.M. Bonnet, R.T.J. McAteer, R.T.J. McAteer, R.W. Noyes, S. Couvidat, S. Criscuoli, S. D. T. Grant, S. Ilonidis, S. Krishna Prasad, S. Krishna Prasad, S. Krishna Prasad, S. Patsourakos, S. Shelyag, S. Shelyag, S. Shelyag, S. Terzo, S. Tomczyk, S. Tomczyk, S. Tsuneta, S. Tsuneta, S. Tsuneta, S. Wedemeyer-Böhm, S. Wedemeyer-Böhm, S. Wedemeyer-Böhm, S.J. Bradshaw, S.K. Mathew, S.K. Solanki, S.K. Solanki, S.L. Keil, S.M. Jefferies, S.R. Cranmer, S.S. Hasan, S.S. Hasan, S.W. McIntosh, T. Doorsselaere Van, T. Doorsselaere Van, T. Doorsselaere Van, T. Doorsselaere Van, T. Kosugi, T. Li, T. Matsumoto, T. Matsumoto, T. Shimizu, T. Wang, T. Wang, T. Yokoyama, T.D. Arber, T.E. Berger, T.J. Bogdan, T.J. Okamoto, T.J. Wang, T.J. Wang, T.K. Suzuki, T.M. Brown, T.M. Pereira, T.R. Rimmele, T.V. Zaqarashvili, U. Narain, U. Narain, V. Domingo, V. Fedun, V. Fedun, V. Martinez Pillet, V. Martínez Pillet, V. Martínez Pillet, V. Yurchyshyn, V.E. Reznikova, V.H. Hansteen, V.M. Nakariakov, V.M. Nakariakov, V.M. Nakariakov, V.M. Nakariakov, V.M. Nakariakov, V.M. Nakariakov, V.M. Uritsky, W. Cao, W. Curdt, W. Kalkofen, W. Kalkofen, W. Kalkofen, W. Livingston, W. Rammacher, W. Schmidt, W.D. Pesnell, W.F. Brisken, Y. Chen, Y. Chen, Y. Lin, Y. Shen, Y. Suematsu, Y. Suematsu, Y. Taroyan, Y. Uchida, Y.-H. Kim, Y.D. Zhugzhda, Y.D. Zhugzhda, Y.Z. Zhang, Z. Liu, Z.-X. Liu   +429 more
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Investigating the Origin of the First Ionization Potential Effect With a Shell Turbulence Model

Frontiers in Astronomy and Space Sciences, 2021
The enrichment of coronal loops and the slow solar wind with elements that have low First Ionization Potential, known as the FIP effect, has often been interpreted as the tracer of a common origin.
Victor Réville, Alexis P. Rouillard, Marco Velli, Andrea Verdini, Éric Buchlin, Michael Lavarra, Nicolas Poirier   +6 more
doaj   +1 more source

Time‐Latitude Distribution of Prominences for 10 Solar Cycles: A Study Using Kodaikanal, Meudon, and Kanzelhohe Data

Earth and Space Science, 2020
Solar prominences are structures of importance because of their role in polar field reversal. We study the long‐term variation of the time latitude distribution of solar prominences in this article.
Subhamoy Chatterjee, Manjunath Hegde, Dipankar Banerjee, B. Ravindra, Scott W. McIntosh   +4 more
doaj   +1 more source

A Unified Picture of the FIP and Inverse FIP Effects [PDF]

, 2004
We discuss models for coronal abundance anomalies observed in the coronae of the sun and other late-type stars following a scenario first introduced by Schwadron, Fisk & Zurbuchen of the interaction of waves at loop footpoints with the partially neutral ...
Favata F., Feldman U., Henoux J.-C., J. Martin Laming, Leroy B., Marsch E., McKenzie J. F., Mewe R., Peter H., Peter H., Peter H., Vauclair S., von Steiger R.   +12 more
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Analysis and modeling of the dynamics of the glow of calcium and hydrogen lines in solar and stellar flares

Open Astronomy, 2021
We present intensity curves of solar flares obtained in the Hα hydrogen line and CaII H, CaIR 8542Å lines using multichannel spectrographs of Ondřejov Observatory (Czech Republic) for the period 2000–2012.
Kupryakov Yurij Alekseevich, Bychkov Konstantin Veniaminovich, Belova Oksana Mikhailovna, Gorshkov Alexey Borisovich, Heinzel Petr, Kotrč Pavel   +5 more
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Radiative accretion shocks along nonuniform stellar magnetic fields in classical T Tauri stars [PDF]

, 2013
(abridged) AIMS. We investigate the dynamics and stability of post-shock plasma streaming along nonuniform stellar magnetic fields at the impact region of accretion columns.
Argiroffi, C., Bonito, R., Chièze, J. P., de Sá, L., Ibgui, L., Lanz, T., Matsakos, T., Miceli, M., Orlando, S., Peres, G., Reale, F., Stehlé, C.   +11 more
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Chromospheric Oscillations

, 1994
We show results from SO/Sacramento Peak data to discuss three issues: (i)--the spatial occurrence of chromospheric 3--min oscillations; (ii)--the validity of Ca II H&K line-center Doppler Shift measurements; (iii)--the signi ?cance of oscillation power and phase at frequencies above 10 mHz.
Lites, B.W., Rutten, R.J., Thomas, J.H.
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THE CHROMOSPHERE-LIKE ENVELOPE OF THE VARIABLE STAR T TAU

Odessa Astronomical Publications, 2017
The emission measure of the near-star chromosphere-like envelope of variable star T Tau with various mechanisms of radiation is computed. The normalization on the observed distribution of energy in continuum spectrum is carried out.
I. V. Shpychka, N. V. Virun
doaj   +1 more source