A5056134253- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Astro and Planetary Science
- Geomagnetism and Paleomagnetism Studies
- Particle Detector Development and Performance
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Geophysics and Gravity Measurements
- Dark Matter and Cosmic Phenomena
- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Solar Radiation and Photovoltaics
- Spacecraft and Cryogenic Technologies
- Earthquake Detection and Analysis
- Computational Physics and Python Applications
- Spacecraft Design and Technology
- Astrophysics and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Astronomical Observations and Instrumentation
- Distributed and Parallel Computing Systems
- Atmospheric Ozone and Climate
- Cell Image Analysis Techniques
- Inertial Sensor and Navigation
- Advanced Semiconductor Detectors and Materials
- Calibration and Measurement Techniques
Heliophysics
2015-2024
Goddard Space Flight Center
2015-2024
University of America
2014-2024
Catholic University of America
2014-2024
Lakehead University
2024
Heliophysics Science Division
2023
Urban College of Boston
2023
Laboratory for Atmospheric and Space Physics
2023
University of Glasgow
2023
IBM (United States)
2020
Abstract The goal of the SunPy project is to facilitate and promote use development community-led, free, open source data analysis software for solar physics based on scientific Python environment. achieves this by developing maintaining sunpy core package supporting an ecosystem affiliated packages. This paper describes first official stable release (version 1.0) package, as well organization infrastructure. concludes with a discussion future project.
We present the case for a dark matter detector with directional sensitivity. This document was developed at 2009 CYGNUS workshop on detection, and contains contributions from theorists experimental groups in field. describe need sensitivity; each experiment presents their project's status; we close feasibility study scaling up to one ton detector, which would cost around $150M.
This paper presents SunPy (version 0.5), a community-developed Python package for solar physics. Python, free, cross-platform, general-purpose, high-level programming language, has seen widespread adoption among the scientific community, resulting in availability of large number software packages, from numerical computation (NumPy, SciPy) and machine learning (scikit-learn) to visualisation plotting (matplotlib). is data-analysis environment specialising providing necessary analyse...
The All-sky Medium Energy Gamma-ray Observatory (AMEGO) is a probe class mission concept that will provide essential contributions to multimessenger astrophysics in the late 2020s and beyond. AMEGO combines high sensitivity 200 keV 10 GeV energy range with wide field of view, good spectral resolution, polarization sensitivity. Therefore, key study astrophysical objects have unique signatures gamma-ray regime, such as neutron star mergers, supernovae, flaring active galactic nuclei....
Aims. Ratios of different significant periods found in the light curves a solar flare exhibiting quasi-periodic pulsations (QPP) are used to distinguish between possible physical mechanisms responsible for such periodic behaviour.
Small amplitude quasi-periodic pulsations (QPPs) detected in soft X-ray emission are commonplace many flares. To date, the underpinning processes resulting QPPs unknown. In this paper, we attempt to constrain prevalence of \textit{stationary} largest statistical study including a relationship QPP periods properties flaring active region, flare ribbons, and CME affiliation. We build upon work \cite{inglis2016} use model comparison test search for significant power Fourier spectra lightcurves...
Quasi-periodic pulsations (QPPs) of gamma-ray emission with a period about 40 s are found in single loop X-class solar flare on 2005 January 1 at photon energies up to 2–6 MeV the SOlar Neutrons and Gamma-rays (SONG) experiment aboard CORONAS-F mission. The oscillations also be present microwave detected Nobeyama Radioheliograph, hard X-ray low energy channels RHESSI. Periodogram correlation analysis shows that QPPs microwave, X-ray, almost synchronous all observation bands. Analysis spatial...
Aims. We aim to perform a spatially resolved analysis of quasi-periodic pulsation event from 8th May 1998 using microwave data the Nobeyama Radioheliograph and Radiopolarimeter, X-ray Yohkoh satellite.
The Dark Matter Time Projection Chamber (DMTPC) is a low pressure (75 Torr CF4) 10 liter detector capable of measuring the vector direction nuclear recoils with goal directional dark matter detection. In this paper we present first limit from DMTPC. an analysis window 80-200 keV recoil energy, based on 35.7 g-day exposure, set 90% C.L. upper spin-dependent WIMP-proton cross section 2.0 x 10^{-33} cm^{2} for 115 GeV/c^2 particle mass.
Electromagnetic (radio, visible-light, UV, EUV, x-ray and gamma-ray) emission generated by solar stellar flares often contains pronounced quasi-periodic pulsations (QPPs). Physical mechanisms responsible for the generation of long-period QPP (with periods longer than 1 s) are likely to be associated with MHD processes. The observed modulation depths, anharmonicity suggest that they can linked some kind auto-oscillations, e.g. an oscillatory regime magnetic reconnection. Such regimes, both...
The dynamics of regions the solar corona are investigated using Atmospheric Imaging Assembly 171 Å and 193 data. coronal emission from quiet Sun, loop footprints, moss, above a sunspot is studied. It shown that mean Fourier power spectra in these can be described by law at lower frequencies tails to flat spectrum higher frequencies, plus Gaussian-shaped contribution varies depending on region This spectral shape contrast commonly held assumption time series well sum long timescale background...
The nature of quasi-periodic pulsations in solar and stellar flares remains debated. Recent work has shown that power-law-like Fourier power spectra, also referred to as 'red' noise processes, are an intrinsic property flare signals, a many previous studies this phenomenon have not accounted for. Hence re-evaluation the existing interpretations assumptions regarding QPP is needed. Here we adopt Bayesian method for investigating phenomenon, fully considering law properties signals. Using data...
Solar filaments exhibit a range of eruptive-like dynamic activity, ranging from the full or partial eruption filament mass and surrounding magnetic structure as coronal ejection (CME), to fully confined 'failed' eruption. On 2011 June 7, dramatic was observed by multiple instruments on SDO STEREO. One interesting aspects this event is response solar atmosphere non-escaping material falls inward under influence gravity. The impact sites show clear evidence brightening in EUV wavelengths due...
ABSTRACT The Hinode /Extreme-ultraviolet Imaging Spectrometer (EIS) obtained rapid cadence (11.2 s) EUV stare spectra of an M7.3 flare ribbon in AR 12036 on 2014 April 18. Quasi-periodic ( P ≈ 75.6 ± 9.2 intensity fluctuations occurred emission lines O iv , Mg vi vii Si Fe xiv and xvi during the flare's impulsive rise, ended when maximum xxiii was reached. profiles –Fe reveal that they were all redshifted most interval quasi-periodic fluctuations, while profile revealed multiple components...
ABSTRACT The nature of quasi-periodic pulsations (QPP) in solar flares is poorly constrained, and critically the general prevalence such signals unknown. Therefore, we perform a large-scale search for evidence consistent with QPP flares, focusing on 1–300 s timescale. We analyze 675 M- X-class observed by Geostationary Operational Environmental Satellite (GOES) series 1–8 Å soft X-rays between 2011 February 1 2015 December 31. Additionally, over same era Fermi /Gamma-ray Burst Monitor (GBM)...
Extreme-ultraviolet (EUV) observations have revealed small-scale transient brightenings that may be caused by the same physical mechanisms as larger-scale solar flares. A notable feature of and stellar flares is presence quasi-periodic pulsations (QPPs), which are a potentially intrinsic characteristic. We investigated properties QPPs detected in EUV brightenings, considered to flares, compared their statistical with those observed extracted integrated light curves 22,623 two quiet Sun...
ABSTRACT Quasi-periodic pulsations (QPPs) are often observed in X-ray emission from solar flares. To date, it is unclear what their physical origins are. Here, we present a multi-instrument investigation of the nature QPP during impulsive and decay phases X1.0 flare 2013 October 28. We focus on character fine structure evident soft (SXR) time derivatives compare this variability with across multiple wavelengths including hard microwave emission. find that phase flare, high correlations...
Solar flares often display pulsating and oscillatory signatures in the emission, known as quasi-periodic pulsations (QPP). QPP are typically identified during impulsive phase of flares, yet some cases, their presence is detected late into decay phase. Here, we report extensive fine structure that throughout large X8.2 flare from 2017 September 10. Following analysis thermal observed GOES/XRS 131 A channel SDO/AIA, find a pulsation period ~65 s followed by lower amplitude with ~150 phase, up...
Long period oscillations of the gyroresonant emission from sunspot atmospheres are studied. Time series data generated sequences images obtained by Nobeyama Radioheliograph operating at a frequency 17 GHz for three sunspots have been analysed and found to contain significant periods in range several tens minutes. Wavelet analysis shows that these persistent throughout observation periods. The presence is confirmed methods (periodogram, wavelets, Fisher randomisation empirical mode...