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Solar corona, the last main layer of the atmosphere of the Sun, is detectable in the EUV and X-ray. The corona is expanding into space up to millions of kilometers and is observable during the eclipse. The temperature is increasing about…

Solar and Stellar Astrophysics · Physics 2019-04-02 Najmeh Ahmadi , Shervin Parsi

With the wide applications of Unmanned Aerial Vehicle (UAV) in engineering such as the inspection of the electrical equipment from distance, the demands of efficient object detection algorithms for abundant images acquired by UAV have also…

Computer Vision and Pattern Recognition · Computer Science 2018-11-26 Meng Lan , Yipeng Zhang , Lefei Zhang , Bo Du

Evidence is beginning to be put forward that demonstrates the role of the chromosphere in supplying energy and mass to the corona. We aim to assess the role of chromospheric jets in active region dynamics. Using a combination of the…

Solar and Stellar Astrophysics · Physics 2015-06-05 R. J. Morton

We identify coronal holes using a histogram-based intensity thresholding technique and compare their properties to fast solar wind streams at three different points in the heliosphere. The thresholding technique was tested on EUV and X-ray…

Solar and Stellar Astrophysics · Physics 2009-05-13 Larisza D. Krista , Peter T. Gallagher

Image saturation has been an issue for several instruments in solar astronomy, mainly at EUV wavelengths. However, with the launch of the Atmospheric Imaging Assembly (AIA) as part of the payload of the Solar Dynamic Observatory (SDO) image…

Solar and Stellar Astrophysics · Physics 2019-09-25 Sabrina Guastavino , Michele Piana , Anna Maria Massone , Richard Schwartz , Federico Benvenuto

Small, impulsive jets commonly occur throughout the solar corona, but are especially visible in coronal holes. Evidence is mounting that jets are part of a continuum of eruptions that extends to much larger coronal mass ejections and…

Solar and Stellar Astrophysics · Physics 2018-02-28 Pankaj Kumar , Judith T. Karpen , Spiro K. Antiochos , Peter F. Wyper , C. Richard DeVore , Craig E. DeForest

Unmanned aerial vehicle (UAV) operations are steadily expanding into many important applications. A key technology for better enabling their commercial use is an onboard sense and avoid (SAA) technology which can detect potential mid-air…

Systems and Control · Computer Science 2020-02-12 Jasmin James , Jason J. Ford , Timothy L. Molloy

In this paper we present the first comprehensive statistical study of EUV coronal jets observed with the SECCHI imaging suites of the two STEREO spacecraft. A catalogue of 79 polar jets is presented, identified from simultaneous EUV and…

Solar and Stellar Astrophysics · Physics 2015-05-13 G. Nistico , V. Bothmer , S. Patsourakos , G. Zimbardo

Solar eruptions such as Coronal Mass Ejections (CMEs) observed in the inner solar corona (up to 4 R$_{\odot}$) show acceleration profiles which appear as parabolic ridges in height-time plots. Inspired by the white-light automated detection…

Solar and Stellar Astrophysics · Physics 2021-02-10 Ritesh Patel , Vaibhav Pant , Priyanka Iyer , Dipankar Banerjee , Marilena Mierla , Matthew J. West

Bringing artificial intelligence (AI) alongside next-generation X-ray imaging detectors, including CCDs and DEPFET sensors, enhances their sensitivity to achieve many of the flagship science cases targeted by future X-ray observatories,…

ADITYA-L1 is India's first space mission to study the Sun from Lagrangian 1 position. { \textit{Visible Emission Line Coronagraph}} (VELC) is one of the seven payloads in ADITYA-L1 mission scheduled to be launched around 2020. One of the…

Solar and Stellar Astrophysics · Physics 2018-08-01 Ritesh Patel , K Amareswari , Vaibhav Pant , Dipankar Banerjee , Sankarasubramanian K , Amit Kumar

Jets can be used to probe the physical properties of the high energy density matter created in collisions at the Relativistic Heavy Ion Collider (RHIC). Measurements of strong suppression of inclusive hadron distributions and di-hadron…

Nuclear Experiment · Physics 2019-08-13 Sevil Salur

The structure of the jet in Cen A is likely better revealed in X-rays than in the radio band, which is usually used to investigate jet proper motions. In this paper, we analyze Chandra ACIS observations of Cen A from 2000 to 2022 and…

High Energy Astrophysical Phenomena · Physics 2024-08-27 David Bogensberger , Jon M. Miller , Richard Mushotzky , W. N. Brandt , Elias Kammoun , Abderahmen Zoghbi , Ehud Behar

Image-based jet analysis is built upon the jet image representation of jets that enables a direct connection between high energy physics and the fields of computer vision and deep learning. Through this connection, a wide array of new jet…

Data Analysis, Statistics and Probability · Physics 2020-12-21 Michael Kagan

Observation of the solar atmosphere reveals a wide range of motions, from small scale jets and spicules to global-scale coronal mass ejections. Identifying and characterizing these motions are essential to advancing our understanding the…

Solar and Stellar Astrophysics · Physics 2015-12-24 Neal Hurlburt

Solar jets are observed as collimated plasma beams over a large range of temperatures and wavelengths. They have been observed in Halpha and optical lines for more than 50 years and called surges. The term "jet" comes from X-ray…

Solar and Stellar Astrophysics · Physics 2022-01-28 Brigitte Schmieder

The dynamics of regions of the solar corona are investigated using Atmospheric Imaging Assembly (AIA) 171\AA\ and 193\AA\ data. The coronal emission from the quiet Sun, coronal loop footprints, coronal moss, and from above a sunspot is…

Solar and Stellar Astrophysics · Physics 2015-06-23 Jack Ireland , R. T. James McAteer , Andrew R. Inglis

Decayless kink oscillations of an ensemble of loops are captured simultaneously by the High Resolution Imager (HRI) of the Extreme Ultraviolet Imager (EUI) and the Atmospheric Imaging Assembly (AIA) from 22:58 UT on 5 November to 00:27 UT…

Solar and Stellar Astrophysics · Physics 2022-09-21 Sihui Zhong , Valery M. Nakariakov , Dmitrii Y. Kolotkov , Cis Verbeeck , David Berghmans

We study intensity variations, as measured by the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory (SDO), in a solar coronal arcade using a newly developed analysis procedure that employs spatio-temporal…

Solar and Stellar Astrophysics · Physics 2019-07-24 Farhad Allian , Rekha Jain , B. W Hindman

The solar corona is the origin of very dynamic events that are mostly produced in active regions (AR) and coronal holes (CH). The exact location of these large-scale features can be determined by applying image-processing approaches to…

Solar and Stellar Astrophysics · Physics 2016-04-19 Saeid Arish , Mohsen Javaherian , Hossein Safari , Ali Amiri