Zobrazeno 1 - 10
of 565
pro vyhledávání: '"J. A. Drake"'
Autor:
T. D. Phan, J. F. Drake, D. Larson, M. Oieroset, S. Eriksson, Z. Yin, B. Lavraud, M. Swisdak, S. D. Bale, R. Livi, O. Romeo, P. Whittlesey, J. Halekas, A. Rahmati, M. Pulupa, A. Szabo, A. Koval, M. Moncuquet, J. Kasper, M. Stevens, M. Desai, N. Raouafi
Publikováno v:
The Astrophysical Journal Letters, Vol 971, Iss 2, p L42 (2024)
We report observations of multiple subscale reconnecting current sheets embedded inside a large-scale heliospheric current sheet (HCS) reconnection exhaust. The discovery was made possible by the unusual skimming trajectory of Parker Solar Probe thro
Externí odkaz:
https://doaj.org/article/be6b144fbc124360a7ebe94c57649a06
Autor:
D. B. Graham, Yu. V. Khotyaintsev, M. André, A. Vaivads, A. Divin, J. F. Drake, C. Norgren, O. Le Contel, P.-A. Lindqvist, A. C. Rager, D. J. Gershman, C. T. Russell, J. L. Burch, K.-J. Hwang, K. Dokgo
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-9 (2022)
It is suggested that waves can provide both diffusion and resistivity that can potentially support the reconnection electric field in low-density astrophysical plasmas. Here, the authors show, using direct spacecraft measurements, that the waves cont
Externí odkaz:
https://doaj.org/article/035c61fc00684615bd84886f172aaac5
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 1, p 74 (2024)
The results of simulations of magnetic reconnection accompanied by electron and proton heating and energization in a macroscale system are presented. Both species form extended power-law distributions that extend nearly three decades in energy. The p
Externí odkaz:
https://doaj.org/article/15d5f6b0a11d44e1bb05d65ffebd6a20
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 1, p 109 (2024)
Hard X-ray-emitting ( δ -type) symbiotic binaries, which exhibit a strong hard X-ray excess, have posed a challenge to our understanding of accretion physics in degenerate dwarfs. RT Cru, which is a member of the δ -type symbiotics, shows stochasti
Externí odkaz:
https://doaj.org/article/c1e3933fe01b4a19926904d825985394
Autor:
M. Øieroset, T. D. Phan, J. F. Drake, M. Starkey, S. A. Fuselier, I. J. Cohen, C. C. Haggerty, M. A. Shay, M. Oka, D. J. Gershman, K. Maheshwari, J. L. Burch, R. B. Torbert, R. J. Strangeway
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 2, p 144 (2024)
We survey 20 reconnection outflow events observed by Magnetospheric MultiScale in the low- β and high-Alfvén-speed regime of the Earth’s magnetotail to investigate the scaling of ion bulk heating produced by reconnection. The range of inflow Alfv
Externí odkaz:
https://doaj.org/article/3b721ad915814b1eb883e6be761720f1
Publikováno v:
The Astrophysical Journal, Vol 964, Iss 1, p 97 (2024)
The waves generated by high-energy proton and alpha particles streaming from solar flares into regions of colder plasma are explored using particle-in-cell simulations. Initial distribution functions for the protons and alphas consist of two populati
Externí odkaz:
https://doaj.org/article/2f48466d534941879e8f61d40b126c31
Publikováno v:
The Astrophysical Journal Letters, Vol 959, Iss 2, p L21 (2023)
Switchbacks (SBs) are localized structures in the solar wind containing deflections of the magnetic field direction relative to the background solar wind magnetic field. The amplitudes of the magnetic field deflection angles ( θ ) for different SBs
Externí odkaz:
https://doaj.org/article/a98b64d5b7044cbda0d0a7de5109284d
Publikováno v:
The Astrophysical Journal, Vol 959, Iss 2, p 140 (2023)
The high-energy radiation emitted by young stars can have a strong influence on their rotational evolution at later stages. This is because internal photoevaporation is one of the major drivers of the dispersal of circumstellar disks, which surround
Externí odkaz:
https://doaj.org/article/a84d64ad42e54328943982f3cfe72a0e
Publikováno v:
The Astrophysical Journal, Vol 959, Iss 1, p 4 (2023)
We compare hybrid (kinetic proton, fluid electron) and particle-in-cell (kinetic proton, kinetic electron) simulations of the solar wind termination shock with parameters similar to those observed by Voyager 2 during its crossing. The steady-state re
Externí odkaz:
https://doaj.org/article/6f5d4432d2bc4f2896ec8a59215f3fe1
Autor:
E. Flaccomio, J. F. Albacete-Colombo, J. J. Drake, M. G. Guarcello, V. Kashyap, N. J. Wright, K. Briggs, B. Ercolano, M. McCollough, S. Sciortino
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 269, Iss 1, p 12 (2023)
We analyze the X-ray spectra of the ∼8000 sources detected in the Cygnus OB2 Chandra Legacy Survey (this focus issue), with the goals of characterizing the coronal plasma of the young low-mass stars in the region and estimating their intrinsic X-ra
Externí odkaz:
https://doaj.org/article/b1ffde7ea00d4aedb9565f7a7f5f8508