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We present spectroscopic and imaging observations of small-scale reconnection events on the Sun. Using the Interface Region Imaging Spectrograph (IRIS) observations, one reconnection event is first detected as IRIS jets with fast…

太阳与恒星天体物理 · 物理学 2018-07-25 Dong Li , Leping Li , Zongjun Ning

In this paper, we present for the first time a comprehensive statistical study between type II radio bursts from the metric (m) to the dekameric-hectometric (DH) domain and their associated solar and space weather (SW) phenomena, namely,…

太阳与恒星天体物理 · 物理学 2025-07-03 Pooja Devi , Rositsa Miteva , Ramesh Chandra , Kostadinka Koleva , Bendict Lawrance

The upcoming SCALES (Slicer Combined with Array of Lenslets for Exoplanet Spectroscopy) instrument for W.M. Keck Observatory will enable new imaging and low-/mid-resolution coronagraphic integral field spectroscopic observations over the…

Solar radio spikes are short duration and narrow bandwidth fine structures in dynamic spectra observed from GHz to tens of MHz range. Their very short duration and narrow frequency bandwidth are indicative of sub-second small-scale energy…

太阳与恒星天体物理 · 物理学 2021-08-31 Daniel L. Clarkson , Eduard P. Kontar , Mykola Gordovskyy , Nicolina Chrysaphi , Nicole Vilmer

Using high resolution off-band \ha\ data from the New Solar Telescope and Morlet wavelet analysis technique, we analyzed transverse motions of type II spicules observed near the North Pole of the Sun. Our new findings are that i) some of…

太阳与恒星天体物理 · 物理学 2012-07-30 V. Yurchyshyn , A. Kilcik , V. Abramenko

Determining the magnetic field related to solar spicules is vital for developing adequate models of these plasma jets, which are thought to play a key role in the thermal, dynamic and magnetic structure of the Chromosphere. Here we report…

太阳与恒星天体物理 · 物理学 2014-11-20 R. Centeno , J. Trujillo Bueno , A. Asensio Ramos

Plasma flow measurements in solar active region filaments are rare, particularly in the infrared and ultraviolet ranges that probe the chromosphere and transition region. In addition, previous studies generally focused on prominences and…

太阳与恒星天体物理 · 物理学 2025-11-04 M. Murabito , V. Andretta , S. Parenti , C. Kuckein , S. J. Gonzàlez Manrique , S. M. Lezzi , S. L. Guglielmino

The C II 133.5 nm multiplet has been observed by NASA's Interface Region Imaging Spectrograph (IRIS) in unprecedented spatial resolution. The aims of this work are to characterize these new observations of the C II lines, place them in…

太阳与恒星天体物理 · 物理学 2015-10-30 Bhavna Rathore , Tiago M. D. Pereira , Mats Carlsson , Bart De Pontieu

Interplanetary coronal mass ejections (ICMEs) are one of the main drivers for space weather disturbances. In the past, different approaches have been used to automatically detect events in existing time series resulting from solar wind in…

Full disk observations of the solar chromosphere in the Ca II K line represent a valuable dataset for studies of solar magnetic activity. The S-index is widely used to investigate the magnetic activity of stars, however, its connection to…

太阳与恒星天体物理 · 物理学 2024-07-08 G. Vanden Broeck , S. Bechet , F. Clette , G. Rauw , K. -P. Schröder , M. Mittag

We present a full analysis of a broadband spectral line survey of Sagittarius B2 (Main), one of the most chemically rich regions in the Galaxy located within the giant molecular cloud complex Sgr B2 in the Central Molecular Zone. Our goal…

星系天体物理 · 物理学 2021-07-07 T. Möller , P. Schilke , A. Schmiedeke , E. A. Bergin , D. C. Lis , Á. Sánchez-Monge , A. Schwörer , C. Comito

A web-based, interactive system for the remote processing of imaging data sets (i.e., EUV, X-ray and microwave) and the automated interactive detection of wave and oscillatory phenomena in the solar atmosphere is presented.The system…

太阳与恒星天体物理 · 物理学 2015-05-19 R. A. Sych , V. M. Nakariakov , S. Anfinogentov , L. Ofman

Impact collision ion scattering spectroscopy (ICISS), which is a variation of low energy ion scattering (LEIS) that employs large scattering angles, is performed on Bi2Se3 surfaces prepared by ion bombardment and annealing (IBA). ICISS…

材料科学 · 物理学 2017-07-24 Weimin Zhou , Haoshan Zhu , Jory A. Yarmoff

We aim with the present study to provide observational evidences on whether coronal hole spicules reach coronal temperatures. We combine multi-instrument co-observations obtained with the SUMER/SoHO and with the EIS/SOT/XRT/Hinode. The…

太阳与恒星天体物理 · 物理学 2015-05-28 M. S. Madjarska , K. Vanninathan , J. G. Doyle

The Integrated Science Investigation of the Sun (IS$\odot$IS) energetic particle instrument suite on Parker Solar Probe is dedicated to measuring energetic ions and electrons in the near-Sun environment. It includes a half-sky-viewing…

We study a solar spicule observed off-limb using high-resolution imaging spectroscopy in the Ca II 8542 \AA\ line obtained with the CRisp Imaging SpectroPolarimeter (CRISP) on the Swedish 1-m Solar Telescope. Using a new version of the…

太阳与恒星天体物理 · 物理学 2021-03-03 D. Kuridze , H. Socas-Navarro , J. Koza , R. Oliver

In this work we analyze the spectroscopic properties of a large number of H ii regions, \sim2600, located in 38 galaxies. The sample of galaxies has been assembled from the face-on spirals in the PINGS survey and a sample described in…

Spectral lines allow us to probe the thermodynamics of the solar atmosphere, but the shape of a single spectral line may be similar for different thermodynamic solutions. Multiline analyses are therefore crucial, but computationally…

太阳与恒星天体物理 · 物理学 2021-05-19 Brandon Panos , Lucia Kleint , Sviatoslav Voloshynovskiy

We study the properties and geoeffectiveness of solar wind high-speed streams (HSSs) emanating from coronal holes and associated with stream interaction regions (SIRs). This paper presents a statistical study of 588 SIR/HSS events with…

空间物理 · 物理学 2020-06-12 Maxime Grandin , Anita T. Aikio , Alexander Kozlovsky

During its commissioning phase in 2020, the Spectrometer/Telescope for Imaging X-rays (STIX) on board the Solar Orbiter spacecraft observed 69 microflares. The two most significant events from this set (of GOES class B2 and B6) were…

太阳与恒星天体物理 · 物理学 2022-03-14 J. Saqri , A. M. Veronig , A. Warmuth , E. C. M. Dickson , A. F. Battaglia , T. Podladchikova , H. Xiao , M. Battaglia , G. J. Hurford , S. Krucker