2 edition of Inferences on coronal magnetic fields from SOHO UVCS observations found in the catalog.
Inferences on coronal magnetic fields from SOHO UVCS observations
1996 by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va .
Written in English
|Statement||G. Poletto ... [et al.].|
|Series||[NASA contractor report] -- NASA-CR-203251.|
|Contributions||Poletto, G., United States. National Aeronautics and Space Administration.|
|The Physical Object|
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Get this from a library. Inferences on coronal magnetic fields from SOHO UVCS observations. [G Poletto; United States. National Aeronautics and Space Administration.;]. In this paper we analyze some aspects of coronal physics, related to the magnetic field behavior, which forthcoming SOHO UVCS observations can help better understand.
UNIQUE DETERMINATION OF MODEL CORONAL MAGNETIC FIELDS USING PHOTOSPHERIC OBSERVATIONS XUEPU ZHAO and J. TODD HOEKSEMA Center for Space Science and Astrophysics, Stanford University, Stanford, CAU.S.A. (Received 12 June, ; in. STEREO-A/COR1 and SOHO/LASCO-C2 Observations The optical data were obtained with the Large Angle and Spectrometric Coronagraph C2 (LASCO-C2; Brueckner et al., ) on board the Solar and Heliospheric Observatory (SOHO), and the COR1 coronagraph of the Sun–Earth Connection Coronal and Helio.
Suess's research works with 3, citations and 1, reads, including: Morphology, dynamics and plasma parameters of plumes and inter-plume regions in solar coronal holes.
Very Large Array (VLA) observations at wavelengths of 20 and 91 cm have been combined with data from the SOHO and RHESSI solar missions to study the evolution of transequatorial loops connecting active regions on the solar surface. The radio observations provide information about the acceleration and propagation of energetic electrons in these large-scale coronal magnetic Cited by: 1.
Interestingly, UVCS observations at and Rsolar show no trace of the jet and SOHO/LASCO observations also yield no firm detection.
We find that a simple ballistic model can explain most of the dynamical properties of this jet, while the morphology and the thermal properties agree well with reconnection-driven X-ray jet models. Plasma temperatures of 2 to 3 MK were obtained from SERTS and Yohkoh data (Schmelz et al., ), and, taking into account microwave polarization observations, coronal–longitudinal magnetic fields of 30– 60 G (3– 6 μT) were deduced for heights between 5 and 10 km (Brosius et al., ).
SERTS also measured shifts of lines emitted Cited by: Abstract. A concise tutorial review is given of solar wind observations and theory with emphasis on the more recent findings from the Ulysses and SOHO missions, in particular about the plasma state and structure of the polar coronal holes, and on theoretical efforts to model the coronal hole flows and the fast solar wind emanating therefrom.
The FIELDS instrument (Bale et al. ) measures DC-coupled magnetic and electric fields, plasma wave magnetic and electric fields, and solar radio emissions.
From the measured local electric and magnetic fields, it produces an estimate of the Poynting flux, i.e., the electromagnetic energy flux crossing that region of space. Kinetic plasma physics of the solar corona and solar wind are reviewed with emphasis on the theoretical understanding of the in situ measurements of solar wind particles and waves, as well as on the remote-sensing observations of the solar corona made by means of ultraviolet spectroscopy and by: Multispacecraft observations of magnetic clouds and their solar origins between 19 and 23 MaySolar Phys., (2),Kirsch, E., and U.
Mall, Suprathermal proton and alpha-particle bursts (E/q= keV/e). INTRODUCTION. The origin of the magnetic fields inside the star is not still understood well. According to the recent progresses of the theoretical researches, there are two possibilities for the mechanism to generate and sustain magnetic fields, i.e.
(1) the dynamo theory and (2) the fossil field theory (see the review by Moss ).Stars which have convective regions regenerate and sustain Cited by: observations of magnetic field and coronal morphology evolution (e.g. AltrockSolar. Phys.,). Each new, 19 – 20 year cycle can be detected in magnetic polarity at high latitude just after solar maximum, both in ephemeral regions and in large scale measures of toroidal Size: 4MB.
and Heliospheric Observatory (SOHO, Domingo, Fleck, &. Poland ), Au gust This coordinated observation makes it possible to observe the response of the (I MK) solar corona to the evolution of the photospheric magnetic field.
Qualita tive observations show that coronal loops evolve continually on a discontinuous basis. Author name code: mikic ADS astronomy entries on author: of the solar corona requires that the results of advanced magnetohydrodynamic models driven by measured magnetic fields, and particularly the underlying heating models, be thoroughly compared with coronal observations.
The comparison has so far mainly concerned the global. velocity distributions in two coronal massa ejections as deduced by UVCS-SOHO Astron. Astrophys., in press; Zuccarello F., Contarino L., Romano P.: Analysis of solar flares in optical and EUV ranges, Il Nuovo Cimento, in press.
INVITED CONTRIBUTIONS AND REVIEWS. Lanza A. F., Rodonò M.: Magnetic activity and dynamic phenomena in close. Physical structure of a coronal streamer in the closed-field regionas observed from UVCS/SOHO and SXT/YOHKOH Litwin,C. and Rosner,R.ApJLL Coronal scale-height enhancement by magnetohydrodynamic waves.
Precise Quantization of the Anomalous Hall Effect near Zero Magnetic Field A.J. Bestwick,1,2 E.J. Fox,1,2 Xufeng Kou,3 Lei Pan,3 Kang L. Wang,3 and D. Goldhaber-Gordon1,2,* 1Department of Physics, Stanford University, Stanford, CaliforniaUSA 2Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Sand Hill Road, Menlo Park, CaliforniaCited by: 2.
UVCS. These first-of-a-kind observations by UVCS and other instruments aboard the international Solar and Heliospheric Observatory (SOHO) are providing the best descriptions yet of the workings of the Sun from its core to its surface.
The observations also are leading the way to better. High-order coupled cluster method study of frustrated and unfrustrated quantum magnets in external magnetic fields. Farnell DJ(1), Zinke R, Schulenburg J, Richter J. Author information: (1)Academic Department of Radiation Oncology, Faculty of Medical and Human Science, University of Manchester, c/o The Christie NHS Foundation Trust, Manchester Cited by: In an experiment that is designed to measure the Earth’s magnetic field using the Hall effect, a copper bar cm thick is positioned along an east–west direction.
If a current of A in the conductor results in a Hall voltage of x 10 V, what is the magnitude of the. The Observations Plot panel illustrates the differential magnitudes for the two selected stars.
This panel receives the selected period from the PDM Plot and Period Selection Panel. The light curve plot type is shown as time (in days) by default and the spacing of vertical lines illustrates the selected period.
While viewing your experimental set up from above, complete the following diagram to show the compass needle direction without and with current in the wire, when the compass is held midway up the wire at the four positions depicted.
By your observations in Q5, and predictions from Q4, how do the magnitudes of the field produced by the current in the wire and the Earth’s magnetic. INTERNATIONAL REFEREED JOURNALS 1) Bagnulo S., Wade G.A., Donati J.-F A study of polarised spectra of magnetic CP stars: predicted vs.
observed Stokes IQUV profiles for beta CrB and 53 Cam, Astron velocity distributions in two coronal massa ejections as deduced by UVCS-SOHO, Astron.
Astrophys., in press. 61) Zuccarello F. Question 6: In an experiment designed to measure the Earth’s magnetic field using the Hall effect, a copper bar cm thick is positioned along an east–west direction.
Assume n = x 10 28 electrons/m 3 and the plane of the bar is rotated to be perpendicular to the direction of B. Scientists follow specific processes in order to determine valid explanations and conclusions from observations.
David observed strange lights in the sky above his home outside of Roswell, New Mexico. The only explanation that makes sense to him is that there are UFOs in the area.
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Questions W denotes answer available in Student Solutions. Magnetic Induction of a Current Carrying Long Straight Wire Power Supply Figure Long wire apparatus connected to direct current supply. Repeat Step 3 with the compass immediately below the long wire section. Stand the long wire apparatus on its end so that the current in the outside long wire is vertically downward.
The variable stripe length method described by Shaklee and Leheny, [Appl. Phys. Lett. 18, ()] is a straightforward way to determine the steady-state gain spectrum of laser material.
Here, c Cited by: Scientists follow specific processes in order to determine valid explanations and conclusions from observations. David observed strange lights in the sky above his home outside of Roswell, New Mexico. The only explanation that makes sense to him is that there are UFOs in the area.
What should David do next to verify his explanation. observations per year are anticipated [8, 9], opening new avenues for studies of compact objects in highly relativis-tic conditions. During the approximately ten years of operation of the ground-based GW interferometer network, analysis development e orts for binary coalescences have been focused on the detection problem, and rightly so: how.
family based on the comets observed by SOHO in Section 6. Possible future observations are discussed in Section 7, and conclusions are given in Section 8. OVERVIEW OF SOHO/LASCO NASA’s SOHO spacecraft was launched in December and began taking data in January.
It is in a halo orbit around the Earth–Sun Lagrange point L1. SOHO. FIELDS (Bale et al., ) measures DC and AC magnetic and electric fields, plasma wave spectra, and solar radio emissions. From the measured local electric and magnetic fields, it produces an estimate of the Poynting flux, the energy flux crossing that region of space.
The 3. Kinetic plasma physics of the solar corona and solar wind are reviewed with emphasis on the theoretical understanding of the in situ measurements of solar wind particles and waves, as well as on the remote-sensing observations of the solar corona made by means of ultraviolet spectroscopy and imaging.
In order to explain coronal and interplanetary heating, the micro-physics of the dissipation. by using hardware modi cations, additional observations or principles can be easily accessed to help the derivation of either the sharp image or the blur kernel, resulting in reduced ill-posedness.
In reviewing the literatures on image deblurring, we have been attracted by a number of interesting discoveries.Courtney believes that the dinosaurs went extinct as a result of a giant asteroid hitting the earth. Scientists discovered a km wide crater dating back to the time of .Time-Frequency Dynamics of Biofuels-Fuels-Food System Lukas Vachaa,b, Karel Jandab,c,d,LadislavKristoufeka,b, David Zilbermane aInstitute of Information Theory and Automation, Academy of Sciences of the Czech Republic, Pod Vodarenskou Vezi 4, 08, Prague, Czech Republic, EU bInstitute of Economic Studies, Faculty of Social Sciences, Charles University in Prague.