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Solar jets are impulsive, collimated plasma ejections that are triggered by magnetic reconnection. They are observed for many decades in various temperatures and wavelengths, therefore their kinematic characteristics, such as velocity and…

Solar and Stellar Astrophysics · Physics 2022-08-17 Brigitte Schmieder , Reetika Joshi , Ramesh Chandra

We present a comprehensive study of a series of recurrent jets that occurred at the periphery of the NOAA active region 12114 on 2014 July 7. These jets were found to share the same source region and exhibited rotational motions as they…

Solar and Stellar Astrophysics · Physics 2020-01-08 Lei Lu , Li Feng , Ying Li , Dong Li , Zongjun Ning , Weiqun Gan

Strong EUV lineshifts in solar spectra are generally indicative of highly dynamic and explosive events that are easily detected in comparable-wavelength EUV images, with the strongest such line shifts (several 100 km/s) occurring in solar…

Solar and Stellar Astrophysics · Physics 2025-12-04 Alphonse C. Sterling , Louise K. Harra , Navdeep K. Panesar , Ronald L. Moore

We present the first joint high-resolution observations of small-scale EUV jets using Solar Orbiter(SolO)'s Extreme Ultraviolet Imager and High Resolution Imager (HRI) and H$\alpha$ imaging from the Visible Imaging Spectrometer (VIS)…

Solar and Stellar Astrophysics · Physics 2025-10-21 Jeongwoo Lee , Dana Longcope , Junmu Youn , Navdeep K. Panesar , Nengyi Huang , Haimin Wang

Solar jets are an important field of study, as they may contribute to the mass and energy transfer from the lower to the upper atmosphere. We use the Interface Region Imaging Spectrograph (IRIS) and Solar Dynamic Observatory (SDO)…

Solar and Stellar Astrophysics · Physics 2024-10-01 Myrto Koletti , Costis Gontikakis , Spiros Patsourakos , Kanaris Tsinganos

We present simultaneous observations of three recurring jets in EUV and soft X-ray (SXR), which occurred in an active region on 2007 June 5. By comparing their morphological and kinematic characteristics in these two different wavelengths,…

Solar and Stellar Astrophysics · Physics 2015-05-28 Liheng Yang , Yunchun Jiang , Jiayan Yang , Yi Bi , Ruisheng Zheng , Junchao Hong

Universal small-scale solar activity in quiet region are suggested to be a potential source of solar wind and the upper solar atmosphere. Here, with the high-resoltion 174 \AA~imaging observations from the Solar Orbiter/Extreme Ultraviolet…

Solar and Stellar Astrophysics · Physics 2024-12-19 Yadan Duan , Hechao Chen , Zhenyong Hou , Zheng Sun , Yuandeng Shen

We examine in greater detail five events previously identified as being sources of strong transient coronal outflows in a solar polar region in Hinode/EUV Imaging Spectrometer (EIS) Doppler data. Although relatively compact or faint and…

Solar and Stellar Astrophysics · Physics 2022-11-30 Alphonse C. Sterling , Conrad Schwanitz , Louise K. Harra , Nour E. Raouafi , Navdeep K. Panesar , Ronald L. Moore

High-resolution observations of dynamic phenomena give insight into properties and processes that govern the low solar atmosphere. We present the analysis of jet-like phenomena emanating from a penumbral foot-point in active region (AR)…

Solar and Stellar Astrophysics · Physics 2020-10-09 Llŷr Dafydd Humphries , Erwin Verwichte , David Kuridze , Huw Morgan

The Interface Region Imaging Spectrograph(IRIS) with its high spatial and temporal resolution brings exceptional plasma diagnostics of solar chromospheric and coronal activity during magnetic reconnection. The aim of this work is to study…

Solar and Stellar Astrophysics · Physics 2021-01-20 Reetika Joshi , Brigitte Schmieder , Akiko Tei , Guillaume Aulanier , Juraj Lörinčík , Ramesh Chandra , Petr Heinzel

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…

Solar and Stellar Astrophysics · Physics 2018-07-25 Dong Li , Leping Li , Zongjun Ning

We present the results of multi wavelength, co-spatial and near co-temporal observations of jets above a sunspot light bridge. The data were obtained with the Solar Optical Telescope (SOT) on board Hinode, the Interface Region Spectrograph…

Solar and Stellar Astrophysics · Physics 2015-05-12 Lokesh Bharti

Here we present the study of a compact emission source during an X1.3 flare on 2022-March-30. Within a $\sim41$~s period (17:34:48 UT to 17:35:29 UT), IRIS observations show spectral lines of Mg II, C II and Si IV with extremely broadened,…

Solar and Stellar Astrophysics · Physics 2023-09-13 Yan Xu , Graham S. Kerr , Vanessa Polito , Nengyi Huang , Ju Jing , Haimin Wang

Coronal jets are short-lived eruptive features commonly observed in polar coronal holes and are thought to play a key role in the transfer of mass and energy into the solar corona. We describe unique contemporaneous observations of a…

Network loops are a common feature in the quiet Sun. The physical processes sustaining their energy budget is still under discussion. We rely on a multi-instrumental (Solar Orbiter/EUI, Solar Orbiter/PHI, IRIS) observation of a six hours…

Solar and Stellar Astrophysics · Physics 2026-03-31 A. Dolliou , H. Peter , S. Mandal , L. P. Chitta , L. Teriaca , Y. Chen , D. Calchetti

The Interface Region Imaging Spectrograph (IRIS) has been obtaining near- and far-ultraviolet images and spectra of the solar atmosphere since July 2013. The unique combination of near and far-ultraviolet spectra and images at subarcsecond…

Intensity bursts in ultraviolet (UV) to X-ray wavelengths and plasma jets are typical signatures of magnetic reconnection and the associated impulsive heating of the solar atmospheric plasma. To gain new insights into the process,…

Solar and Stellar Astrophysics · Physics 2021-12-15 L. P. Chitta , S. K. Solanki , H. Peter , R. Aznar Cuadrado , L. Teriaca , U. Schühle , F. Auchère , D. Berghmans , E. Kraaikamp , S. Gissot , C. Verbeeck

Solar jets are well-collimated plasma ejections in the solar atmosphere. They are prevalent in active regions, the quiet Sun, and even coronal holes. They display a range of temperatures, yet the nature of the cool components has not been…

Solar and Stellar Astrophysics · Physics 2023-04-26 Ya Wang , Qingmin Zhang , Zhenxiang Hong , Jinhua Shen , Haisheng Ji , Wenda Cao

Three extreme-ultraviolet (EUV) jets recurred in about one hour on 2010 September 17 in the following magnetic polarity of active region 11106. The EUV jets were observed by the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics…

Solar and Stellar Astrophysics · Physics 2015-06-15 Y. Guo , P. Démoulin , B. Schmieder , M. D. Ding , S. Vargas Domínguez , Y. Liu

Solar ultraviolet (UV) bursts are small-scale compact brightenings in transition region images. The spectral profiles of transition region lines in these bursts are significantly enhanced and broadened, often with chromospheric absorption…

Solar and Stellar Astrophysics · Physics 2020-04-07 Yajie Chen , Hui Tian , Xiaoshuai Zhu , Tanmoy Samanta , Linghua Wang , Jiansen He
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