Results 11 to 20 of about 650,857 (339)
The HERMES Solar Atlas and the spectroscopic analysis of the seismic solar analogue KIC3241581 [PDF]
, 2015 Solar-analog stars provide an excellent opportunity to study the Sun's evolution, i.e. the changes with time in stellar structure, activity, or rotation for solar-like stars.
Beck, P. G. +9 more
core +2 more sources
The place of the Sun among the Sun-like stars [PDF]
, 2013 Context. Monitoring of the photometric and chromospheric HK emission data series of stars similar to the Sun in age and average activity level showed that there is an empirical correlation between the average stellar chromospheric activity level and the ...
Cessateur, G. +3 more
core +1 more source
Transactions of the International Astronomical Union, 1982 This report summarizes research on solar activity over an almost three-year period from January 1, 1979, till the end of June 1981. In preparing this report we respected the advice of the I.A.U. Executive Committee to cover the highlights of work carried out in the field of solar physics relevant to our Commission, and avoiding double work.
H. Yoshimura +10 more
openaire +2 more sources
A brief history of Regional Warning Center China (RWC-China) [PDF]
History of Geo- and Space Sciences, 2018 Solar-terrestrial prediction services in China began in 1969 at the Beijing Astronomical Observatory (BAO), Chinese Academy of Sciences (CAS). In 1990, BAO joined the International URSIgram and World Days Service (IUWDS) and started solar-terrestrial ...
H. He +18 more
doaj +1 more source
The Magnetic Field in the Solar Atmosphere [PDF]
, 2014 This publication provides an overview of magnetic fields in the solar atmosphere with the focus lying on the corona. The solar magnetic field couples the solar interior with the visible surface of the Sun and with its atmosphere.
Solanki, Sami K. +2 more
core +2 more sources
Scale sequentially CLEAN for Mingantu Spectral Radioheliograph
Solar-Terrestrial Physics, 2019 MingantU SpEctral Radioheliograph (MUSER) is a solar-dedicated radio heliograph, adopting aperture synthesis technique to image the Sun in the frequency range of 0.4 GHz to 15 GHz.
Jun Cheng, Yihua Yan, Dong Zhao, Long Xu
doaj +1 more source
Characterization of solar-cycle induced frequency shift of medium- and high-degree acoustic modes
, 2011 Although it is well known that the solar acoustic mode frequency increases as the solar activity increases, the mechanism behind it is still unknown. Mode frequencies with 20 < l < 900 obtained by applying spherical harmonic decomposition to MDI full ...
Basu +5 more
core +1 more source
Advanced characterization and simulation of SONNE: a fast neutron spectrometer for Solar Probe Plus [PDF]
, 2009 SONNE, the SOlar NeutroN Experiment proposed for Solar Probe Plus, is designed to measure solar neutrons from 1-20 MeV and solar gammas from 0.5-10 MeV.
Bloser, Peter F. +9 more
core +2 more sources
Eos, Transactions American Geophysical Union, 1991 Perhaps the most newsworthy item of recent times concerning solar activity is its unprecedented strength during the rising phase of its current 11‐year cycle. Examples of its potency include a major, well‐observed solar flare in March 1989 that launched an unusually powerful blast wave that, hitting Earth, caused spectacular low‐latitude auroras and ...
openaire +1 more source
The onset of solar cycle 24: What global acoustic modes are telling us
, 2009 We study the response of the low-degree, solar p-mode frequencies to the unusually extended minimum of solar surface activity since 2007. A total of 4768 days of observations collected by the space-based, Sun-as-a-star helioseismic GOLF instrument are ...
Beer +22 more
core +1 more source