Results 131 to 140 of about 860 (219)

Full Stokes-vector Inversion of the Solar Mg ii h and k Lines

The Astrophysical Journal
The polarization of the Mg ii h and k resonance lines is the result of the joint action of scattering processes and the magnetic field–induced Hanle, Zeeman, and magneto-optical effects, thus holding significant potential for the diagnostic of the ...
Hao Li, Tanausú del Pino Alemán, Javier Trujillo Bueno   +2 more
doaj   +1 more source

The solar chromosphere at millimetre and ultraviolet wavelengths: I. Radiation temperatures and a detailed comparison

, 2019
Solar observations with the Atacama Large Millimeter/submillimeter Array (ALMA) provide us with direct measurements of the brightness temperature in the solar chromosphere.
De Pontieu, Bart Walter, S. Jafarzadeh, M. Carlsson, S. Wedemeyer, Rezaei, Rezza, M. Szydlarski, Jafarzadeh, Shahin, Wedemeyer, Sven, B. De Pontieu, Szydlarski, Mikolaj Marcin, R. Rezaei, Carlsson, Mats   +11 more
core   +1 more source

Measuring the magnetic fields in the chromospheres of low-mass stars. [PDF]

Nat Commun
Cang T, Petit P, Donati JF, Tian H, Fu J, Li H, Bellotti S, Hu X, Ma X, Lopez Ariste A, Xing K, Morin J, Lu H, Zong W.   +13 more
europepmc   +2 more sources

Bidirectional Plasma Jets Driven by Magnetic Reconnection: Observations by GST and SDO

The Astrophysical Journal
Using high-resolution photospheric and chromospheric observations taken by the Goode Solar Telescope, we studied two groups of bidirectional plasma jets occurring in active region NOAA 13110. Supplementary observations are also provided by Solar Dynamics
Yangyu Liu, Jinhua Shen, Xu Yang, Shuai Gu, Jianping Li, Haisheng Ji   +5 more
doaj   +1 more source

Formation of Chromospheric Fan-shaped Jets through Magnetic Reconnection

The Astrophysical Journal Letters
Recurrent chromospheric fan-shaped jets highlight the highly dynamic nature of the solar atmosphere. They have been named as “light walls” or “peacock jets” in high-resolution observations. In this study, we examined the underlying mechanisms responsible
Annu Bura, Tanmoy Samanta, Avijeet Prasad, Ronald L. Moore, Alphonse C. Sterling, Vasyl Yurchyshyn, Arun Surya   +6 more
doaj   +1 more source

Various Features of the X-class White-light Flares in Super Active Region NOAA 13664

The Astrophysical Journal Letters
Super active region NOAA 13664 produced 12 X-class flares (including the largest one so far, an occulted X8.7 flare, in solar cycle 25) during 2024 May 8–15, and 11 of them are identified as white-light flares. Here we present various features of these X-
Ying Li, Xiaofeng Liu, Zhichen Jing, Wei Chen, Qiao Li, Yang Su, De-Chao Song, M. D. Ding, Li Feng, Hui Li, Weiqun Gan   +10 more
doaj   +1 more source

The role and contribution of magnetic fields, characterized via their magnetic flux, to the statistical structuring of the solar atmosphere. [PDF]

Sci Rep, 2022
Li KJ, Xu JC, Feng W.
europepmc   +1 more source

MHD mode conversion of fast and slow magnetoacoustic waves in the solar corona

, 2010
There are three main wave types present in the Sun’s atmosphere: Alfvén waves and fast and slow magnetoacoustic waves. Alfvén waves are purely magnetic and would not exist if it was not for the Sun’s magnetic field.
McDougall-Bagnall, A. M. Dee
core  

Bayesian Inference for Identifying Solar Active Regions

, 1997
The solar chromosphere consists of three classes --- plage, network, background --- which contribute di#erently to ultraviolet radiation reaching the earth. Solar physicists are interested in relating plage area and intensity to UV irradiance, as well as
Michael Turmon, Judit Pap, Saleem Mukhtar   +2 more
core  

Transverse oscillations and an energy source in a strongly magnetized sunspot. [PDF]

Nat Astron, 2023
Yuan D, Fu L, Cao W, Kuźma B, Geeraerts M, Trelles Arjona JC, Murawski K, Van Doorsselaere T, Srivastava AK, Miao Y, Feng S, Feng X, Noda CQ, Cobo BR, Su J.   +14 more
europepmc   +1 more source