Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Jayant Joshi"'
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 1, p 30 (2024)
We present spectropolarimetric observations of an active region recorded simultaneously in the H α and the Ca ii 8662 Å lines. The sunspot exhibits multiple structures, including a light bridge and a region where the Ca ii 8662 Å line core is in e
Externí odkaz:
https://doaj.org/article/6820840730994274a89bbe436823c3b3
Publikováno v:
The Astrophysical Journal, Vol 946, Iss 1, p 38 (2023)
We investigated the diagnostic potential of the Stokes V profile of the H α line to probe the chromospheric line-of-sight (LOS) magnetic field ( B _LOS ) by comparing the B _LOS inferred from the weak field approximation (WFA) with that inferred fro
Externí odkaz:
https://doaj.org/article/953ddc4b89794916aa8453a74733b42c
Publikováno v:
2022 4th International Conference on Advances in Computing, Communication Control and Networking (ICAC3N).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e456cb5b9d3ed8401b7942bed8a7a127
https://doi.org/10.1109/icac3n56670.2022.10074068
https://doi.org/10.1109/icac3n56670.2022.10074068
Magnetic reconnection in the deep solar atmosphere can give rise to enhanced emission in the Balmer hydrogen lines, a phenomenon referred to as Ellerman bombs. Recent high quality H$\beta$ observations indicate that Ellerman bombs are more common tha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::982b12b6b32cff654e21f91bc3409a97
http://hdl.handle.net/10852/95882
http://hdl.handle.net/10852/95882
Publikováno v:
Astronomy & Astrophysics. 668:A153
Short-lived (100s or less), sub-arcsec to a couple of arcsec size features of enhanced brightenings in the narrowband images at the $\mathrm{H_{2V}}$ and $\mathrm{K_{2V}}$ positions of the Ca II H and K lines in the quiet Sun are known as bright grai
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d16153fd6181dd69fef8266cf642f8c0
https://doi.org/10.1051/0004-6361/202244332
https://doi.org/10.1051/0004-6361/202244332
Publikováno v:
Astronomy & Astrophysics
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=r3c4b2081b22::b7f8d77357aaaaad24429b64adee7dc5
Publikováno v:
Astronomy & Astrophysics
Ellerman bombs are regions with enhanced Balmer line wing emission and mark magnetic reconnection in the deep solar atmosphere in active regions and quiet Sun. They are often found in regions where opposite magnetic polarities are in close proximity.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61bf87d8dfae1861b1edbb99cf6452e1
Autor:
Tine Libbrecht, Johan Pires Bjørgen, Jorrit Leenaarts, Jayant Joshi, Viggo Hansteen, Jaime de la Cruz Rodríguez
Aims. We aim to explain line formation of He I D3 and He I 10830 {\AA} in small-scale reconnection events. Methods. We make use of a simulated Ellerman bomb (EB), present in a Bifrost-generated radiative Magnetohydrodynamics (rMHD) snapshot. The resu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79d4f8bd0ec0df1bed6916da4f200b89
http://arxiv.org/abs/2010.15946
http://arxiv.org/abs/2010.15946
Publikováno v:
Astronomy & Astrophysics
Ellerman Bomb-like brightenings of the hydrogen Balmer line wings in the quiet Sun (QSEBs) are a signature of the fundamental process of magnetic reconnection at the smallest observable scale in the solar lower atmosphere. We analyze high spatial res
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::73c7afeabfcb8015f68ad3049fedbbee
http://hdl.handle.net/10852/80175
http://hdl.handle.net/10852/80175
Autor:
Jayant Joshi, Daniel Nóbrega-Siverio, Vasco Manuel de Jorge Henriques, Clara Froment, H. Skogsrud, Ada Ortiz, Göran B. Scharmer, Eamon Scullion, C. Quintero Noda, Milan Gošić, Georgios Chintzoglou, Mats Carlsson, R. Timmons, Lucia Kleint, Pia Zacharias, Tiago M. D. Pereira, T. Leifsen, M. M. Woods, Viggo Hansteen, Mikolaj Szydlarski, Petra Kohutova, Juan Martinez-Sykora, Gregal J. M. Vissers, Souvik Bose, Ainar Drews, David Graham, Shahin Jafarzadeh, A. Sainz Dalda, D. Schmit, A. Popovas, L. Rouppe van der Voort, J. de la Cruz Rodríguez, B. De Pontieu
Publikováno v:
Astronomy & Astrophysics
NASA's Interface Region Imaging Spectrograph (IRIS) provides high resolution observations of the solar atmosphere through UV spectroscopy and imaging. Since the launch of IRIS in June 2013, we have conducted systematic observation campaigns in coordi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dc9acd3f7a018f7c6cd656cfba6b5ad9