Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Marc L. DeRosa"'
Autor:
Soumyaranjan Dash, Marc L. DeRosa, Mausumi Dikpati, Xudong Sun, Sushant S. Mahajan, Yang Liu, J. Todd Hoeksema
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 2, p 288 (2024)
Knowledge of the global magnetic field distribution and its evolution on the Sun’s surface is crucial for modeling the coronal magnetic field, understanding the solar wind dynamics, computing the heliospheric open flux distribution, and predicting
Externí odkaz:
https://doaj.org/article/14a2b7e6e5c44236828c91fec1615b9b
Autor:
Emily I. Mason, Roberto Lionello, Cooper Downs, Jon A. Linker, Ronald M. Caplan, Marc L. DeRosa
Publikováno v:
The Astrophysical Journal Letters, Vol 959, Iss 1, p L4 (2023)
We present in this Letter the first global comparison between traditional line-tied steady-state magnetohydrodynamic models and a new, fully time-dependent thermodynamic magnetohydrodynamic simulation of the global corona. To approximate surface magn
Externí odkaz:
https://doaj.org/article/7ad7f2295dd1485ea38ae051b4692f97
Autor:
Roberto Lionello, Cooper Downs, Emily I. Mason, Jon A. Linker, Ronald M. Caplan, Pete Riley, Viacheslav S. Titov, Marc L. DeRosa
Publikováno v:
The Astrophysical Journal, Vol 959, Iss 2, p 77 (2023)
We describe, test, and apply a technique to incorporate full-Sun, surface flux evolution into an MHD model of the global solar corona. Requiring only maps of the evolving surface flux, our method is similar to that of Lionello et al., but we introduc
Externí odkaz:
https://doaj.org/article/7434e047920a4e618ea1086c6743f0af
Autor:
David F. Fouhey, Richard E. L. Higgins, Spiro K. Antiochos, Graham Barnes, Marc L. DeRosa, J. Todd Hoeksema, K. D. Leka, Yang Liu, Peter W. Schuck, Tamas I. Gombosi
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 264, Iss 2, p 49 (2023)
We investigate the cross-calibration of the Hinode/Solar Optical Telescope-Spectro-Polarimeter (SOT-SP) and Solar Dynamics Observatory/Helioseismic and Magnetic Imager (SDO/HMI) instrument metadata, specifically the correspondence of the scaling and
Externí odkaz:
https://doaj.org/article/1a7bf6cc159e4a74ab2c6d76184d226e
Autor:
Graham Barnes, Marc L. DeRosa, Shaela I. Jones, Charles N. Arge, Carl J. Henney, Mark C. M. Cheung
Publikováno v:
The Astrophysical Journal, Vol 946, Iss 2, p 105 (2023)
The concept of surface-flux transport (SFT) is commonly used in evolving models of the large-scale solar surface magnetic field. These photospheric models are used to determine the large-scale structure of the overlying coronal magnetic field, as wel
Externí odkaz:
https://doaj.org/article/7c6fa3921d1647f38ced77022b74c4ce
Accurate modeling of the Sun's coronal magnetic field and solar wind structures require inputs of the solar global magnetic field, including both the near and far sides, but the Sun's far-side magnetic field cannot be directly observed. However, the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e11ba26c9235f383678081d98b1c6a66
http://arxiv.org/abs/2211.12666
http://arxiv.org/abs/2211.12666
Autor:
David F. Fouhey, Richard E. L. Higgins, Spiro K. Antiochos, Graham Barnes, Marc L. DeRosa, J. Todd Hoeksema, K. D. Leka, Yang Liu, Peter W. Schuck, Tamas I. Gombosi
We investigate the cross-calibration of the Hinode/SOT-SP and SDO/HMI instrument meta-data, specifically the correspondence of the scaling and pointing information. Accurate calibration of these datasets gives the correspondence needed by inter-instr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c98f66c3df36f78771f84528a23a7dd9
The torus instability (TI) of current-carrying magnetic flux tubes is thought to drive many solar coronal mass ejections (CMEs). The background magnetic field provides the stabilizing force: if it decreases with height at a rate slower than a critica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::77af0b47e609b91eb5e41c3935bf057e
Publikováno v:
The Astrophysical Journal. 928:154
Solar coronal dimmings have been observed extensively in the past two decades. Due to their close association with coronal mass ejections (CMEs), there is a critical need to improve our understanding of the physical processes that cause dimmings as w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::47447cc60e5e54ffcfbe4523ab3b2e0f
https://doi.org/10.3847/1538-4357/ac589b
https://doi.org/10.3847/1538-4357/ac589b
A physical magnetic field has a divergence of zero. Numerical error in constructing a model field and computing the divergence, however, introduces a finite divergence into these calculations. A popular metric for measuring divergence is the average
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42d9aca1323a25ebac83860d0bd31c6b
http://arxiv.org/abs/2008.08863
http://arxiv.org/abs/2008.08863