Zobrazeno 1 - 10
of 65
pro vyhledávání: '"Shinsuke Takasao"'
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 25 (2024)
X-rays have significant impacts on cold, weakly ionized protoplanetary disks by increasing the ionization rate and driving chemical reactions. Stellar flares are explosions that emit intense X-rays and are the unique source of hard X-rays with an ene
Externí odkaz:
https://doaj.org/article/5b9c72b054ae45e3b885d146c98c3386
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 2, p 281 (2024)
Photoevaporation driven by hydrogen-ionizing extreme-ultraviolet (EUV) radiation profoundly shapes the lives of diverse astrophysical objects. We construct an analytical model accounting for the finite timescales of photoheating and photoionization a
Externí odkaz:
https://doaj.org/article/bd63324aaf5e4c9cb343bdb5fcbf0841
Publikováno v:
The Astrophysical Journal, Vol 963, Iss 1, p 26 (2024)
We numerically construct a series of axisymmetric rotating magnetic wind solutions, aiming at exploring the observation properties of massive white dwarf (WD) merger remnants with a strong magnetic field, a fast spin, and an intense mass loss, as inf
Externí odkaz:
https://doaj.org/article/578b2045835e4283a7f08ac3b5a623de
Publikováno v:
Experimental Results, Vol 3 (2022)
The short timescale of the solar flare reconnection process has long proved to be a puzzle. Recent studies suggest the importance of the formation of plasmoids in the reconnecting current sheet, with quantifying the aspect ratio of the width to lengt
Externí odkaz:
https://doaj.org/article/8242adcd75a24636978076b8ee4b1210
Autor:
Gregory J. Herczeg, Yuguang Chen, Jean-Francois Donati, Andrea K. Dupree, Frederick M. Walter, Lynne A. Hillenbrand, Christopher M. Johns-Krull, Carlo F. Manara, Hans Moritz Günther, Min Fang, P. Christian Schneider, Jeff A. Valenti, Silvia H. P. Alencar, Laura Venuti, Juan Manuel Alcalá, Antonio Frasca, Nicole Arulanantham, Jeffrey L. Linsky, Jerome Bouvier, Nancy S. Brickhouse, Nuria Calvet, Catherine C. Espaillat, Justyn Campbell-White, John M. Carpenter, Seok-Jun Chang, Kelle L. Cruz, S. E. Dahm, Jochen Eislöffel, Suzan Edwards, William J. Fischer, Zhen Guo, Thomas Henning, Tao Ji, Jessy Jose, Joel H. Kastner, Ralf Launhardt, David A. Principe, Connor E. Robinson, Javier Serna, Michal Siwak, Michael F. Sterzik, Shinsuke Takasao
Publikováno v:
The Astrophysical Journal, Vol 956, Iss 2, p 102 (2023)
Accretion plays a central role in the physics that governs the evolution and dispersal of protoplanetary disks. The primary goal of this paper is to analyze the stability over time of the mass accretion rate onto TW Hya, the nearest accreting solar-m
Externí odkaz:
https://doaj.org/article/ce42b0d00dc5441485186ec510cbe7cf
Publikováno v:
The Astrophysical Journal, Vol 943, Iss 2, p 106 (2023)
Extreme-ultraviolet imaging spectroscopic observations often show an increase in line width around the loop-top or above-the-loop-top (ALT) region of solar flares, suggestive of turbulence. In addition, recent spectroscopic observations found the osc
Externí odkaz:
https://doaj.org/article/daa2ee626b2d45b480e004bcf5419998
Publikováno v:
The Astrophysical Journal, Vol 944, Iss 2, p 192 (2023)
We investigate gamma-ray emission in the impulsive phase of solar flares and the detectability of nonthermal signatures from protostellar flares. Energetic solar flares emit high-energy gamma rays of GeV energies, but their production mechanism and e
Externí odkaz:
https://doaj.org/article/54c412a4b0184c8d977cba84318ecfc5
Publikováno v:
The Astrophysical Journal, Vol 946, Iss 1, p 57 (2023)
Externí odkaz:
https://doaj.org/article/a18d61cce211482bacf7be1ca28758e5
Publikováno v:
The Astrophysical Journal, Vol 941, Iss 1, p 73 (2022)
We perform three-dimensional (3D) magnetohydrodynamic simulations of magnetospheric accretion in a T Tauri star to study the accretion and wind structures in the close vicinity of the star. The gas accreting onto the star consists of the gas from the
Externí odkaz:
https://doaj.org/article/fb3f83c5ebcc4ed4b082fa8b96be2d38
Recent observations suggest late accretion, which is generally nonaxisymmetric, onto protoplanetary disks. We investigated nonaxisymmetric late accretion considering the effects of magnetic fields. Our model assumes a cloudlet encounter event at a fe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca4580e74ed44e8f29b80e1cdbfc6436
