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Deriving a well-constrained differential emission measure (DEM) distribution for solar flares has historically been difficult, primarily because no single instrument is sensitive to the full range of coronal temperatures observed in flares,…

太阳与恒星天体物理 · 物理学 2014-06-25 Amir Caspi , James M. McTiernan , Harry P. Warren

The Stellar Imager (SI) is a UV-Optical, Space-Based Interferometer designed to enable 0.1 milli-arcsecond (mas) spectral imaging of stellar surfaces and of the Universe in general and asteroseismic imaging of stellar interiors. SI is…

Stellar eruptive events, such as flares and coronal mass ejections (CMEs), can affect planetary habitability by disturbing the stability of their atmospheres. For instance, strong stellar flares and CMEs can trigger atmospheric escape and,…

太阳与恒星天体物理 · 物理学 2025-10-03 Nuri Park , Evgenya L. Shkolnik , Joe Llama

When in situ solar energetic electron (SEE) events are closely associated with nonthermal flares, the escaping electron population is frequently observed to be much smaller than the nonthermal-radiation-emitting population near the solar…

太阳与恒星天体物理 · 物理学 2026-03-02 Meiqi Wang , Bin Chen , Mallory Wickline , Sijie Yu , Sam Krucker , Jeongwoo Lee , Haimin Wang

The Fermi Large Area Telescope (LAT) has been surveying the sky in gamma rays from 30 MeV to more than 300 GeV since August 2008. Fermi is the only mission able to detect high energy > few hundreds MeV emission from the Sun during the new…

高能天体物理现象 · 物理学 2019-08-15 G. Iafrate , F. Longo

X-ray observations of the Sun led Eugene Parker to propose nanoflares as the basic energy-release units that heat the solar corona. Decades later, Solar Orbiter's Extreme Ultraviolet Imager (HRIEUV), operating halfway between Earth and the…

Understanding space weather is vital for the protection of our terrestrial and space infrastructure. In order to predict space weather accurately, large amounts of data are required, particularly in the extreme ultraviolet (EUV) spectrum.…

太阳与恒星天体物理 · 物理学 2024-09-02 Manuel Indaco , Daniel Gass , William James Fawcett , Richard Galvez , Paul J. Wright , Andrés Muñoz-Jaramillo

Mini-EUSO is a compact telescope ($37 \times 37 \times 62$~cm$^3$) currently hosted on board the International Space Station. Mini-EUSO is devoted primarily to study Ultra High Energy Cosmic Rays (UHECR) above $10^{21}$~eV but also to…

天体物理仪器与方法 · 物理学 2022-01-10 G. Cambié , A. Belov , F. Capel , M. Casolino , A. Franceschi , P. Klimov , L. Marcelli , T. Napolitano , P. Picozza , L. W. Piotrowski , E. Reali , M. Ricci

Flare ribbons form when energy released by coronal magnetic reconnection is deposited in the low solar atmosphere, so by studying the dynamics of flare ribbons, one obtains an indirect measurement of reconnection. Our aim is to quantify the…

太阳与恒星天体物理 · 物理学 2026-05-13 Hannah Collier , Säm Krucker , Laura A. Hayes , Emil Kraaikamp , David Berghmans , Daniel F. Ryan

We report SDO/AIA observations of an extraordinary global extreme ultraviolet (EUV) wave triggered by the X8.2+ flare-CME eruption on 2017 September 10. This was one of the best EUV waves ever observed with modern instruments, yet it was…

太阳与恒星天体物理 · 物理学 2018-09-19 Wei Liu , Meng Jin , Cooper Downs , Leon Ofman , Mark C. M. Cheung , Nariaki V. Nitta

The Australian Space Eye is a proposed astronomical telescope based on a 6U CubeSat platform. The Space Eye will exploit the low level of systematic errors achievable with a small space based telescope to enable high accuracy measurements…

With increasing solar activity since 2010, many flares from the backside of the Sun have been observed by the Extreme Ultraviolet Imager (EUVI) on either of the twin STEREO spacecraft. Our objective is to estimate their X-ray peak fluxes…

太阳与恒星天体物理 · 物理学 2013-04-16 N. V. Nitta , M. J. Aschwanden , P. F. Boerner , S. L. Freeland , J. R. Lemen , J. -P. Wuelser

The Extreme Ultraviolet Explorer (EUVE) satellite was used for three days beginning on 1997 Mar 26.96 UT to obtain photometric and spectroscopic observations of the eclipsing SU UMa-type dwarf nova OY Carinae in superoutburst. Because of…

天体物理学 · 物理学 2007-05-23 Christopher W. Mauche , John C. Raymond

The solar group at the National Astronomical Observatory of Japan is conducting synoptic solar observations with the Solar Flare Telescope. While it is a part of a long-term solar monitoring, contributing to the study of solar dynamo…

太阳与恒星天体物理 · 物理学 2020-09-29 Yoichiro Hanaoka , Takashi Sakurai , Ken'ichi Otsuji , Isao Suzuki , Satoshi Morita

The Educational Irish Research Satellite 1 (EIRSAT-1) is a 2U CubeSat being developed under ESA's Fly Your Satellite! programme. The project has many aspects, which are primarily educational, but also include space qualification of new…

The Extreme-ultraviolet Stellar Characterization for Atmospheric Physics and Evolution (ESCAPE) mission is an astrophysics Small Explorer employing ultraviolet spectroscopy (EUV: 80 - 825 \AA\ and FUV: 1280 - 1650 \AA) to explore the…

天体物理仪器与方法 · 物理学 2022-02-01 K. France , B. Fleming , A. Youngblood , J. Mason , J. Drake , the ESCAPE Science , Instrument Team

This paper presents a detailed study of the type II solar radio burst that occurred on 06 March 2014 using combined data analysis. It is a classical radio event consisting of type III radio burst and a following type II radio burst in the…

太阳与恒星天体物理 · 物理学 2024-04-02 V. Vasanth

Small 3He-rich solar energetic particle (SEP) events have been commonly associated with extreme-ultraviolet (EUV) jets and narrow coronal mass ejections (CMEs) which are believed to be the signatures of magnetic reconnection involving field…

太阳与恒星天体物理 · 物理学 2016-12-14 Radoslav Bucik , Davina E. Innes , Glenn M. Mason , Mark E. Wiedenbeck

The {\em Solar Orbiter} is the next solar physics mission of the European Space Agency, ESA, in collaboration with NASA, with a launch planned in 2018. The spacecraft is designed to approach the Sun to within 0.28\,AU at perihelion of a…