Zobrazeno 1 - 10
of 120
pro vyhledávání: '"Dibyendu Nandy"'
Autor:
Souvik Roy, Dibyendu Nandy
Publikováno v:
The Astrophysical Journal Letters, Vol 950, Iss 2, p L11 (2023)
To understand the global-scale physical processes behind coronal mass ejection (CME)–driven geomagnetic storms and predict their intensity as a space weather forecasting measure, we develop an interplanetary CME flux rope–magnetosphere interactio
Externí odkaz:
https://doaj.org/article/94bd6dfb9c404d7e8e8a6afa8de46228
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 9 (2022)
The extreme space weather conditions resulting from high energetic events likes solar flares and Coronal Mass Ejections demand for reliable space weather forecasting. The magnetic flux tubes while rising through the convection zone gets twisted by th
Externí odkaz:
https://doaj.org/article/caa90185684942a8bb95362bf281ef55
Publikováno v:
Progress in Earth and Planetary Science, Vol 8, Iss 1, Pp 1-21 (2021)
Abstract The activity of stars such as the Sun varies over timescales ranging from the very short to the very long—stellar and planetary evolutionary timescales. Experience from our solar system indicates that short-term, transient events such as s
Externí odkaz:
https://doaj.org/article/c2e81c3e94dc4e77a94e1d7959ca3c15
Publikováno v:
The Astrophysical Journal, Vol 953, Iss 1, p 70 (2023)
The magnetic activity of a star—which modulates the stellar wind outflow—shapes the immediate environments of orbiting (exo)planets and induces atmospheric loss, thereby impacting their habitability. We perform a detailed parameter space study us
Externí odkaz:
https://doaj.org/article/8ee1d267c7d34e20992f9f207cb72093
Publikováno v:
The Astrophysical Journal, Vol 953, Iss 1, p 51 (2023)
One of the major sources of perturbation in the solar cycle amplitude is believed to be the emergence of anomalous active regions that do not obey Hale’s polarity law and Joy’s law of tilt angles. Anomalous regions containing high magnetic flux t
Externí odkaz:
https://doaj.org/article/b636e1d484f14afcbd3f54100a740425
Autor:
Prantika Bhowmik, Dibyendu Nandy
Publikováno v:
Nature Communications, Vol 9, Iss 1, Pp 1-10 (2018)
The Sun’s activity cycle impacts space-reliant technologies and the Earth’s climate, but predicting this is challenging. An ensemble forecast based on an innovative combination of two solar magnetic field evolution models indicates a weak, but no
Externí odkaz:
https://doaj.org/article/d20c080cdfa840e0b1ce231987a2512b
Publikováno v:
Monthly Notices of the Royal Astronomical Society: Letters. 517:L36-L40
Long-term sunspot observations and solar activity reconstructions reveal that the Sun occasionally slips into quiescent phases known as solar grand minima, the dynamics during which is not well understood. We use a flux transport dynamo model with st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d58ac78105fe7aaa748d22ea6efd775d
https://doi.org/10.1093/mnrasl/slac104
https://doi.org/10.1093/mnrasl/slac104
Autor:
Souvik Roy, Dibyendu Nandy
Coronal Mass Ejections (CMEs) carry large amounts of magnetized plasma into the heliosphere at very high speeds. Their interplanetary counterparts, or Interplanetary CMEs (ICMEs), create adverse space weather conditions around planets. These interpla
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd4825e4fdb24145cd3b346cac9b5323
https://doi.org/10.5194/egusphere-egu23-16801
https://doi.org/10.5194/egusphere-egu23-16801
Autor:
Aleix Espuña Fontcuberta, Anubhab Ghosh, Saikat Chatterjee, Dhrubaditya Mitra, Dibyendu Nandy
Publikováno v:
Solar Physics. 298
The Sun’s activity, which is associated with the solar magnetic cycle, creates a dynamic environment in space known as space weather. Severe space weather can disrupt space-based and Earth-based technologies. Slow decadal-scale variations on solar-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b944f22f278cf0fb8214a6741da322ce
https://doi.org/10.1007/s11207-022-02104-3
https://doi.org/10.1007/s11207-022-02104-3
Publikováno v:
Monthly Notices of the Royal Astronomical Society: Letters. 506:L50-L54
Recent observations reveal the surprising breakdown of stellar gyrochronology relations at about the Sun's age hinting that middle-aged, solar-like stars transition to a magnetically inactive future. We provide a theoretical basis for these intriguin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::68377ad7149e61644587d784502be3e7
https://doi.org/10.1093/mnrasl/slab035
https://doi.org/10.1093/mnrasl/slab035