A5052246568- Solar and Space Plasma Dynamics
- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Geomagnetism and Paleomagnetism Studies
- Ionosphere and magnetosphere dynamics
- Solar Radiation and Photovoltaics
- Geophysics and Gravity Measurements
- Adaptive optics and wavefront sensing
- Planetary Science and Exploration
- CCD and CMOS Imaging Sensors
- Computational Physics and Python Applications
- Calibration and Measurement Techniques
- Earthquake Detection and Analysis
- Scientific Research and Discoveries
- Optical Polarization and Ellipsometry
- Astronomical Observations and Instrumentation
- Spacecraft Design and Technology
- Fluid Dynamics and Turbulent Flows
- Astronomy and Astrophysical Research
- Spacecraft and Cryogenic Technologies
- Atmospheric Ozone and Climate
- Inertial Sensor and Navigation
- Geotechnical and Geomechanical Engineering
- Astrophysics and Star Formation Studies
- History and Developments in Astronomy
Lockheed Martin (United States)
2008-2019
Lockheed Martin (Canada)
1999-2019
K Lab (United States)
2001-2012
Lockheed Martin (United Kingdom)
2001-2011
Lockheed Martin (Australia)
1997-2011
Science Research Laboratory
1986-2011
Praxis (United States)
2008
National Astronomical Observatory of Japan
2007
High Altitude Observatory
2007
NSF National Center for Atmospheric Research
2007
The Atmospheric Imaging Assembly (AIA) provides multiple simultaneous high-resolution full-disk images of the corona and transition region up to 0.5 R ⊙ above solar limb with 1.5-arcsec spatial resolution 12-second temporal resolution. AIA consists four telescopes that employ normal-incidence, multilayer-coated optics provide narrow-band imaging seven extreme ultraviolet (EUV) band passes centered on specific lines: Fe xviii (94 Å), viii, xxi (131 ix (171 xii, xxiv (193 xiv (211 He ii (304...
The Helioseismic and Magnetic Imager (HMI) instrument investigation as a part of the NASA Solar Dynamics Observatory (SDO) is designed to study convection-zone dynamics solar dynamo, origin evolution sunspots, active regions, complexes activity, sources drivers magnetic activity disturbances, links between internal processes corona heliosphere, precursors disturbances for space-weather forecasts. A brief overview instrument, objectives, standard data products presented.
The Helioseismic and Magnetic Imager (HMI) investigation (Solar Phys. doi: 10.1007/s11207-011-9834-2 , 2011) will study the solar interior using helioseismic techniques as well magnetic field near surface. HMI instrument is part of Solar Dynamics Observatory (SDO) that was launched on 11 February 2010. designed to measure Doppler shift, intensity, vector at photosphere 6173 Å Fe i absorption line. consists a front-window filter, telescope, set waveplates for polarimetry, an...
The Sun Earth Connection Coronal and Heliospheric Investigation (SECCHI) is a five telescope package, which has been developed for the Solar Terrestrial Relation Observatory (STEREO) mission by Naval Research Laboratory (USA), Lockheed Astrophysics Goddard Space Flight Center University of Birmingham (UK), Rutherford Appleton Max Planck Institute System (Germany), Centre Spatiale de Leige (Belgium), Institut d'Optique (France) d'Astrophysique (France). SECCHI comprises telescopes, together...
The splitting of the frequencies global resonant acoustic modes Sun by large-scale flows and rotation permits study variation angular velocity Ω with both radius latitude within turbulent convection zone deeper radiative interior. nearly uninterrupted Doppler imaging observations, provided Solar Oscillations Investigation (SOI) using Michelson Imager (MDI) on Heliospheric Observatory (SOHO) spacecraft positioned at L1 Lagrangian point in continuous sunlight, yield oscillation power spectra...
Alfvén waves have been invoked as a possible mechanism for the heating of Sun's outer atmosphere, or corona, to millions degrees and acceleration solar wind hundreds kilometers per second. However, sufficient strength not unambiguously observed in atmosphere. We used images high temporal spatial resolution obtained with Solar Optical Telescope onboard Japanese Hinode satellite reveal that chromosphere, region sandwiched between surface is permeated by strong amplitudes on order 10 25 second...
The Extreme Ultraviolet Imager (EUVI) is part of the SECCHI instrument suite currently being developed for NASA STEREO mission. Identical EUVI telescopes on two spacecraft will study structure and evolution solar corona in three dimensions, specifically focus initiation early coronal mass ejections (CMEs). telescope at Lockheed Martin Solar Astrophysics Lab. investigation led by Naval Research EUVI's 2048 x pixel detectors have a field view out to 1.7 radii, observe four spectral channels...
The Atmospheric Imaging Assembly (AIA) instrument onboard the Solar Dynamics Observatory (SDO) is an array of four normal-incidence reflecting telescopes that image Sun in ten EUV and UV wavelength channels. We present initial photometric calibration AIA, based on preflight measurements response telescope components. estimated accuracy order 25%, which consistent with results comparisons full-disk irradiance spectral models. also describe characterization performance, including resolution,...
Observations of very quiet Sun using the Solar Optical Telescope/Spectro-Polarimeter (SOT/SP) aboard Hinode spacecraft reveal that internetwork regions are pervaded by horizontal magnetic flux. The spatial average apparent flux density derived from wavelength-integrated measures Zeeman-induced linear polarization is BTapp = 55 Mx cm −2, as compared to corresponding vertical | BLapp| 11 −2. Distributions presented. Magnetic fields organized on mesogranular scales, with both and showing...
The heating of the solar chromosphere and corona is a long-standing puzzle in physics. Hinode observations show ubiquitous presence chromospheric anemone jets outside sunspots active regions. They are typically 3 to 7 arc seconds = 2000 5000 kilometers long 0.2 0.4 second 150 300 wide, their velocity 10 20 per second. These small have an inverted Y-shape, similar shape x-ray corona. features imply that magnetic reconnection occurring at much smaller spatial scale throughout suggest may be...
Solar prominences are cool 10(4) kelvin plasma clouds supported in the surrounding 10(6) coronal by as-yet-undetermined mechanisms. Observations from Hinode show fine-scale threadlike structures oscillating plane of sky with periods several minutes. We suggest that these represent Alfvén waves propagating on magnetic field lines and may play a role heating corona.
We use high-resolution observations of the Sun in Ca II H 3968 A from Solar Optical Telescope on Hinode to show that there are at least two types spicules dominate structure magnetic solar chromosphere. Both tied relentless magnetoconvective driving photosphere, but have very different dynamic properties. ``Type-I'' driven by shock waves form when global oscillations and convective flows leak into upper atmosphere along field lines 3-7 minute timescales. ``Type-II'' much more dynamic: they...
As the interface between Sun’s photosphere and corona, chromosphere transition region play a key role in formation acceleration of solar wind. Observations from Interface Region Imaging Spectrograph reveal prevalence intermittent small-scale jets with speeds 80 to 250 kilometers per second narrow bright network lanes this region. These have lifetimes 20 seconds widths ≤300 kilometers. They originate regions, often preceded by footpoint brightenings accompanied transverse waves amplitudes ~20...
The solar atmosphere was traditionally represented with a simple one-dimensional model. Over the past few decades, this paradigm shifted for chromosphere and corona that constitute outer atmosphere, which is now considered dynamic structured envelope. Recent observations by IRIS (Interface Region Imaging Spectrograph) reveal it difficult to determine what up down even in cool 6000-K photosphere just above surface: region hosts pockets of hot plasma transiently heated almost 100,000 K. energy...
view Abstract Citations (343) References (31) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Statistical Properties of Solar Granulation Derived from the SOUP Instrument on Spacelab 2 Title, A. M. ; Tarbell, T. D. Topka, K. P. Ferguson, S. H. Shine, R. Team Computer algorithms and statistical techniques were used to identify, measure, quantify properties solar granulation derived movies collected by Optical Universal Polarimeter 2. The results show that...
We report findings from multihour 0.2'' resolution movies of solar quiescent prominences (QPs) observed with the Solar Optical Telescope (SOT) on Hinode satellite. The observations verify previous filamentary downflows and vortices in QPs. SOT also large-scale transverse oscillations QPs, periods 20-40 minutes amplitudes 2-5 Mm. upward propagation speed several waves is found to be ~10 km s-1, comparable sound a 10,000 K plasma, implying that are magnetoacoustic origin. Most significantly,...
ABSTRACT Hinode /Solar Optical Telescope (SOT) observations reveal two new dynamic modes in quiescent solar prominences: large-scale (20–50 Mm) “arches” or “bubbles” that “inflate” from below into prominences, and smaller-scale (2–6 dark turbulent upflows. These novel dynamics are related they always visible-light spectral bands, rise through the bright prominence emission with approximately constant speeds, small-scale upflows sometimes observed to emanate top of larger bubbles. Here we...
We present observations of the magnetic landscape polar region Sun that are unprecedented in terms spatial resolution, field view, and polarimetric precision. They were carried out with Solar Optical Telescope aboard Hinode. Using a Milne-Eddington inversion, we find many vertically oriented flux tubes strengths as strong 1 kG scattered latitude between 70° 90°. all have same polarity, consistent global polarity region. The vectors observed to diverge from centers elements, view fields...