Zobrazeno 1 - 10
of 164
pro vyhledávání: '"Helen E. Mason"'
Autor:
Biswajit Mondal, P. S. Athiray, Amy R. Winebarger, Sabrina L. Savage, Ken Kobayashi, Stephen Bradshaw, Will Barnes, Patrick R. Champey, Peter Cheimets, Jaroslav Dudík, Leon Golub, Helen E. Mason, David E. McKenzie, Christopher S. Moore, Chad Madsen, Katharine K. Reeves, Paola Testa, Genevieve D. Vigil, Harry P. Warren, Robert W. Walsh, Giulio Del Zanna
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 1, p 23 (2024)
Nanoflares are thought to be one of the prime candidates that can heat the solar corona to its multimillion kelvin temperature. Individual nanoflares are difficult to detect with the present generation of instruments, but their presence can be inferr
Externí odkaz:
https://doaj.org/article/c0fb35d4000c49de86001bfcf94c097c
Autor:
Yamini K. Rao, B. Mondal, Giulio Del Zanna, N. P. S. Mithun, S. V. Vadawale, K. K. Reeves, Helen E. Mason, Anil Bhardwaj
Publikováno v:
The Astrophysical Journal, Vol 958, Iss 2, p 190 (2023)
We present multiwavelength observations by Chandrayaan-2/Solar X-ray Monitor, Solar Dynamics Observatory/Atmospheric Imaging Assembly, and Hinode/X-Ray Telescope (XRT) of a B-class flare observed on 2021 February 25, originating from an active region
Externí odkaz:
https://doaj.org/article/89af9dfb02254f71ae99109b36baaf76
Autor:
Biswajit Mondal, Santosh V. Vadawale, Giulio Del Zanna, N. P. S. Mithun, Aveek Sarkar, Helen E. Mason, P. Janardhan, Anil Bhardwaj
Publikováno v:
The Astrophysical Journal, Vol 955, Iss 2, p 146 (2023)
The first ionization potential (FIP) bias, whereby elemental abundances for low-FIP elements in different coronal structures vary from their photospheric values and may also vary with time, has been widely studied. In order to study the temporal vari
Externí odkaz:
https://doaj.org/article/53497b9349ca4658b65ea520b62b1790
Autor:
Biswajit Mondal, James A Klimchuk, Santosh V. Vadawale, Aveek Sarkar, Giulio Del Zanna, P. S. Athiray, N. P. S. Mithun, Helen E. Mason, Anil Bhardwaj
Publikováno v:
The Astrophysical Journal, Vol 945, Iss 1, p 37 (2023)
Small-scale impulsive events, known as nanoflares, are thought to be one of the prime candidates that can keep the solar corona hot at its multimillion-Kelvin temperature. Individual nanoflares are difficult to detect with the current generation of i
Externí odkaz:
https://doaj.org/article/527132ea13e0407084dc55cf2827cf6d
Autor:
Giulio Del Zanna, Vincenzo Andretta, Peter J. Cargill, Alain J. Corso, Adrian N. Daw, Leon Golub, James A. Klimchuk, Helen E. Mason
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 8 (2021)
We discuss the diagnostics available to study the 5–10 MK plasma in the solar corona, which is key to understanding the heating in the cores of solar active regions. We present several simulated spectra, and show that excellent diagnostics are avai
Externí odkaz:
https://doaj.org/article/3e13b1b5209a451a955f57186f5911a6
Autor:
Giulio Del Zanna, Helen E. Mason
Publikováno v:
Living Reviews in Solar Physics, Vol 15, Iss 1, Pp 1-278 (2018)
Abstract X-ray and ultraviolet (UV) observations of the outer solar atmosphere have been used for many decades to measure the fundamental parameters of the solar plasma. This review focuses on the optically thin emission from the solar atmosphere, mo
Externí odkaz:
https://doaj.org/article/d836ecdb6621466cb93c87d43cb0c65a
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 517:1422-1435
We use spectroscopic diagnostics to determine different plasma parameters in the transition region of the quiet Sun. The electron number density from O iv lines using high-resolution spectral observations from the Interface Region Imaging Spectrograp
Autor:
Helen E. Mason, Judith A. K. Howard, Rachael J. Potts, Jane L. R. Yates, Matthias J. Gutmann, Hazel A. Sparkes
Publikováno v:
Mason, H E, Yates, J L R, Potts, R J, Gutmann, M J, Howard, J A K & Sparkes, H A 2021, ' Structural studies of N-(methoxysalicylidene)-fluroaniline, N-(methoxysalicylidene)-chloroaniline and N-(methoxysalicylidene)-bromoaniline derivatives ', Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials, vol. B77, no. 6, pp. 974-980 . https://doi.org/10.1107/S2052520621009835
Twenty seven N-(methoxysalicylidene)-haloaniline (halo = F, Cl or Br) compounds were synthesized. The crystal structures of all 27 compounds have been determined at low temperature and are reported herein, along with a variable-temperature neutron di
Publikováno v:
Acta Crystallographica. Section C, Structural Chemistry
Acta Crystallographica Section C Structural Chemistry, 2021, Vol.77(12), pp.777-781 [Peer Reviewed Journal]
Acta Crystallographica Section C Structural Chemistry, 2021, Vol.77(12), pp.777-781 [Peer Reviewed Journal]
The synthesis and structures of two polymorphs, A and B, of Co(NCS)2(abpt)2 and Ni(NCS)2(abpt)2 are reported. The polymorph structures of A with CoII or NiII were found to be isostructural, as were the corresponding pair of polymorph B structures wit
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 504:1201-1218
Active regions often show S-shaped structures in the corona called sigmoids. These are highly sheared and twisted loops formed along the polarity inversion line. They are considered to be one of the best pre-eruption signatures for CMEs. Here, we inv