CLASP Constraints on the Magnetization and Geometrical Complexity of the Chromosphere-Corona Transition Region

0498998 - ASÚ 2019 RIV US eng J - Článek v odborném periodiku
Trujillo Bueno, J. - Štěpán, Jiří - Belluzzi, L. - Asensio Ramos, A. - Sainz, R.M. - del Pino Aleman, T. - Casini, R. - Ishikawa, R. - Kano, R. - Winebarger, A. - Auchere, F. - Narukage, N. - Kobayashi, K. - Bando, T. - Katsukawa, Y. - Kubo, M. - Ishikawa, S. - Giono, G. - Hara, H. - Suematsu, Y. - Shimizu, T. - Sakao, T. - Tsuneta, S. - Ichimoto, K. - Cirtain, J. - Champey, P. - de Pontieu, B. - Carlsson, M.
CLASP Constraints on the Magnetization and Geometrical Complexity of the Chromosphere-Corona Transition Region.
Astrophysical Journal Letters. Roč. 866, č. 1 (2018), č. článku L15. ISSN 2041-8205. E-ISSN 2041-8213
Grant CEP: GA ČR(CZ) GA16-16861S
Institucionální podpora: RVO:67985815
Klíčová slova: scattering polarization * energy * transition region
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 8.374, rok: 2018

The Chromospheric Lyman-Alpha Spectro-Polarimeter (CLASP) is a suborbital rocket experiment that on 2015 September 3 measured the linear polarization produced by scattering processes in the hydrogen Lya line of the solar disk radiation. The line-center photons of this spectral line radiation mostly stem from the chromospherecorona transition region (TR). These unprecedented spectropolarimetric observations revealed an interesting surprise, namely that there is practically no center-to-limb variation (CLV) in the Q/I line-center signals. Using an analytical model, we first show that the geometric complexity of the corrugated surface that delineates the TR has a crucial impact on the CLV of the Q/I and U/I line-center signals. Second, we introduce a statistical description of the solar atmosphere based on a 3D model derived from a state-of-the-art radiation magnetohydrodynamic simulation.
Trvalý link: http://hdl.handle.net/11104/0291284