Zobrazeno 1 - 10
of 99
pro vyhledávání: '"Hansteen, V. H."'
The solar atmosphere is a complex environment with diverse species and varying ionization states, especially in the chromosphere, where significant ionization variations occur. This region transitions from highly collisional to weakly collisional sta
Externí odkaz:
http://arxiv.org/abs/2409.15552
Our understanding of magnetic reconnection (MR) under chromospheric conditions remains limited. Recent observations have demonstrated the important role of ion-neutral interactions in the dynamics of the chromosphere. Furthermore, the comparison betw
Externí odkaz:
http://arxiv.org/abs/2211.02157
Autor:
Santos, J. M. da Silva, Rodríguez, J. de la Cruz, White, S. M., Leenaarts, J., Vissers, G. J. M., Hansteen, V. H.
Publikováno v:
A&A 643, A41 (2020)
We aim to investigate the temperature enhancements and formation heights of impulsive heating phenomena in solar active-regions such as Ellerman bombs (EBs), ultraviolet bursts (UVBs), and flaring active-region fibrils (FAFs) using interferometric ob
Externí odkaz:
http://arxiv.org/abs/2006.14564
Autor:
van der Voort, L. H. M. Rouppe, De Pontieu, B., Carlsson, M., Rodriguez, J. de la Cruz, Bose, S., Chintzoglou, G., Drews, A., Froment, C., Gosic, M., Graham, D. R., Hansteen, V. H., Henriques, V. M. J., Jafarzadeh, S., Joshi, J., Kleint, L., Kohutova, P., Leifsen, T., Martinez-Sykora, J., Nobrega-Siverio, D., Ortiz, A., Pereira, T. M. D., Popovas, A., Noda, C. Quintero, Dalda, A. Sainz, Scharmer, G. B., Schmit, D., Scullion, E., Skogsrud, H., Szydlarski, M., Timmons, R., Vissers, G. J. M., Woods, M. M., Zacharias, P.
Publikováno v:
A&A 641, A146 (2020)
NASA's Interface Region Imaging Spectrograph (IRIS) provides high resolution observations of the solar atmosphere through UV spectroscopy and imaging. Since the launch of IRIS in June 2013, we have conducted systematic observation campaigns in coordi
Externí odkaz:
http://arxiv.org/abs/2005.14175
Publikováno v:
A&A 639, A20 (2020)
Coronal rain consists of cool and dense plasma condensations formed in coronal loops as a result of thermal instability. Previous numerical simulations of thermal instability and coronal rain formation have relied on artificially adding a coronal hea
Externí odkaz:
http://arxiv.org/abs/2005.03317
Publikováno v:
The Astrophysical Journal Letters, 859:L26 (7pp), 2018 June 1
Small bipolar magnetic features are observed to appear in the interior of individual granules in the quiet Sun, signaling the emergence of tiny magnetic loops from the solar interior. We study the origin of those features as part of the magnetoconvec
Externí odkaz:
http://arxiv.org/abs/1806.00489
The measured average velocities in solar and stellar spectral lines formed at transition region temperatures have been difficult to interpret. However, realistic three-dimensional radiation magnetohydrodynamics (3D rMHD) models of the solar atmospher
Externí odkaz:
http://arxiv.org/abs/1804.07513
Autor:
van der Voort, L. Rouppe, De Pontieu, B., Scharmer, G. B., Rodriguez, J. de la Cruz, Martinez-Sykora, J., Nobrega-Siverio, D., Guo, L. J., Jafarzadeh, S., Pereira, T. M. D., Hansteen, V. H., Carlsson, M., Vissers, G.
Publikováno v:
The Astrophysical Journal Letters, 2017, Volume 851, L6
Magnetic reconnection is thought to drive a wide variety of dynamic phenomena in the solar atmosphere. Yet the detailed physical mechanisms driving reconnection are difficult to discern in the remote sensing observations that are used to study the so
Externí odkaz:
http://arxiv.org/abs/1711.04581
Autor:
De Pontieu, B., Title, A. M., Lemen, J., Kushner, G. D., Akin, D. J., Allard, B., Berger, T., Boerner, P., Cheung, M., Chou, C., Drake, J. F., Duncan, D. W., Freeland, S., Heyman, G. F., Hoffman, C., Hurlburt, N. E., Lindgren, R. W., Mathur, D., Rehse, R., Sabolish, D., Seguin, R., Schrijver, C. J., Tarbell, T. D., Wuelser, J. -P., Wolfson, C. J., Yanari, C., Mudge, J., Nguyen-Phuc, N., Timmons, R., van Bezooijen, R., Weingrod, I., Brookner, R., Butcher, G., Dougherty, B., Eder, J., Knagenhjelm, V., Larsen, S., Mansir, D., Phan, L., Boyle, P., Cheimets, P. N., DeLuca, E. E., Golub, L., Gates, R., Hertz, E., McKillop, S., Park, S., Perry, T., Podgorski, W. A., Reeves, K., Saar, S., Testa, P., Tian, H., Weber, M., Dunn, C., Eccles, S., Jaeggli, S. A., Kankelborg, C. C, Mashburn, K., Pust, N., Springer, L., Carvalho, R., Kleint, L., Marmie, J., Mazmanian, E., Pereira, T. M. D., Sawyer, S., Strong, J., Worden, S. P., Carlsson, M., Hansteen, V. H., Leenaarts, J., Wiesmann, M., Aloise, J., Chu, K. -C., Bush, R. I., Scherrer, P. H., Brekke, P., Martinez-Sykora, J., Lites, B. W., McIntosh, S. W., Uitenbroek, H., Okamoto, T. J., Gummin, M. A., Auker, G., Jerram, P., Pool, P., Waltham, N.
The Interface Region Imaging Spectrograph (IRIS) small explorer spacecraft provides simultaneous spectra and images of the photosphere, chromosphere, transition region, and corona with 0.33-0.4 arcsec spatial resolution, 2 s temporal resolution and 1
Externí odkaz:
http://arxiv.org/abs/1401.2491
Autor:
De Pontieu, B., Carlsson, M., van der Voort, L. H. M. Rouppe, Rutten, R. J., Hansteen, V. H., Watanabe, H.
Spicules are long, thin, highly dynamic features that jut out ubiquitously from the solar limb. They dominate the interface between the chromosphere and corona and may provide significant mass and energy to the corona. We use high-quality observation
Externí odkaz:
http://arxiv.org/abs/1205.5006