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3 edition of Investigation of physical parameters in stellar flares observed by Ginga found in the catalog.

Investigation of physical parameters in stellar flares observed by Ginga

Investigation of physical parameters in stellar flares observed by Ginga

final report submitted to ... Marshall Space Flight Center ...

  • 135 Want to read
  • 3 Currently reading

Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va .
Written in English

    Subjects:
  • Emission spectra.,
  • Spectrum analysis.,
  • Stellar flares.,
  • Stellar models.,
  • Stellar radiation.,
  • X ray astronomy.,
  • X ray spectra.

  • Edition Notes

    Statementprincipal investigator, Robert A. Stern.
    SeriesNASA contractor report -- NASA CR-196823.
    ContributionsUnited States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15403610M

    X-ray astronomy, study of celestial objects by means of the X rays they emit, in the wavelength range from to 10 nanometers. X-ray astronomy dates to with the discovery. Some 52 stellar systems beyond our own, the Solar System, currently lie within parsecs ( light-years) of the systems contain a total of 63 stars, of which 50 are red dwarfs, by far the most common type of star in the Milky more massive stars, such as our own, make up the remaining In addition to these "true" stars, scientists have identified 11 brown dwarfs.

    Gurzadyan has papers predicting elliptical accretion disks formed in galactic nuclei at tidal disruption of stars near massive black holes; the tidal mechanism currently is associated to the flares observed in : 21 November (age 63), Yerevan, Armenian SSR. The RAVE-on catalog of stellar atmospheric parameters and chemical abundances for chemo-dynamic studies in the Gaia era Andrew R. Casey1, Keith Hawkins1, David W. Hogg2;3;4;5, Melissa Ness5, Hans Walter-Rix5, Georges Kordopatis6, Andrea Kunder6, Matthias Steinmetz6, Sergey Koposov1, Harry Enke6, Jason Sanders1, Gerry Gilmore1, Toma z Zwitter6, Kenneth C. Freeman7, Luca Casagrande7.

      Vistas in Astronomy, Volume 2 covers the spectacular and interesting developments in the field of astronomy. This volume is organized into six parts encompassing 59 chapters that specifically explore solar-terrestrial relations, geophysics, planetary system, stellar Book Edition: 1. @article{osti_, title = {An Interactive Multi-instrument Database of Solar Flares}, author = {Sadykov, Viacheslav M and Kosovichev, Alexander G and Oria, Vincent and Nita, Gelu M}, abstractNote = {Solar flares are complicated physical phenomena that are observable in a broad range of the electromagnetic spectrum, from radio waves to γ by: 6.


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Investigation of physical parameters in stellar flares observed by Ginga Download PDF EPUB FB2

Investigation of Physical Parameters in Stellar Flares Observed by Ginga NASA Contract NAS Final Report Submitted To: National Aeronautics and Space Administration Marshall Space Flight Center AL Principal Investigator: Robert A.

Stern Dept Bldg Lockheed Palo Alto Research Laboratory Hanover St. Palo Alto, CA Get this from a library. Investigation of physical parameters in stellar flares observed by Ginga. [Robert A Stern; United States. National Aeronautics and Space Administration.].

This program involves analysis and interpretation of results from GINGA Large Area Counter (LAC) observations from a group of large stellar x-ray flares.

All LAC data are re-extracted using the standard Hayashida method of LAC background subtraction and analyzed using various models available with the XSPEC spectral fitting program. Get this from a library. Investigation of physical parameters in stellar flares observed by Ginga: final report submitted to Marshall Space Flight Center.

[Robert A Stern; United States. National Aeronautics and Space Administration.]. This program involves analysis and interpretation of results from GINGA Large Area Counter (LAC) observations from a group of large stellar x-ray flares.

All LAC data are re-extracted using the standard Hayashida method of LAC background subtraction and analyzed using various models available with the XSPEC spectral fitting : Robert A. Stern. Investigation of Physical Parameters in Stellar Flares Observed by Ginga NASA Contract NAS Final Report Submitted To: National Aeronautics and Space Administration Marshall Space Flight Center AL Principal Investigator: Robert A.

Stern Dept Bldg Lockheed Palo Alto Research Laborat51 Hanover St. Palo Alto, CA GINGA, in particular, observed large flares in UX Ari (Tsuru et al ), V Tau (Stern et al ), II Peg (Doyle et al ), and Algol (Stern et al ).

These systems invariably show evidence of quiescent plasma temperatures of at least 10 MK, with thermal Author: Robert A. Stern. Observations of the Pleiades cluster by the method of stellar tracks, carried out on the inch Schmidt telescope of Byurakan Astrophysical Observatory, have resulted in the detection of 49 flares from 38 stars, 17 of which were not previously known to be flare stars.

It is shown that for bright stars (U ≤ ) the detection of flares in observations by the method of stellar tracks is at Author: H.

Chavushian, G. Broutian, A. Oskanian. All the obtained physical parameters are consistent with previously derived values for stellar flares, and the areas - less than % of the stellar surface - are comparable with the size inferred Author: Fabio Reale. Byrne's research works with citations and 1, reads, including: Modelling of the large X-ray flare on II Peg observed with GINGA.

An analysis of the solar flare waiting time distribution The X-ray flux was about four times higher than that observed in with Ginga and showed variation of factor 2 during the. AA48CHBenz ARI 16 July Physical Processes in Magnetically Driven Flares on the Sun, Stars, and Young Stellar Objects Arnold O.

Benz1 and Manuel Gudel¨ 1,2 1Institute of Astronomy, ETH Honggerberg, CH Zurich, Switzerland;¨ email: [email protected] We report GINGA observations of the pre main sequence star AB Doradus (HD ), performed during 8 – 12 January, Some rotational modulation might be present.

four X-ray flares were detected. The solar flares are, however, unique, since the high-energy tail produced there can be directly observed via a bremsstrahlung continuum emission (Fig.

; Lin and Hudson, ; Brown, ; also, see the review of Fletcher et al., ), and the coronal X-ray sources can be easily fitted with a kappa distribution (Kašparová and Karlický Author: E.

Dzifčáková, J. Dudík. Bromage's research works with 2, citations and 1, reads, including: A Multi-wavelength study of the M dwarf binary YY Geminorum. tant constraints on flare physical parameters, including temperatures, cooling times, densities, and size scales.

There is, however, considerably less knowledge regarding flare frequency in such systems. This is simply because the vast majority of information we have regarding stellar X-ray flares was obtained with pointed instruments on Einstein.

XMM-Newton data of an X-ray flare observed on Proxima Centauri provide detailed and challenging constraints for flare modeling. The comparison of the Author: Fabio Reale. We have carried out a new gas-dynamic simulation of the physical processes occurring in a fixed amount of plasma confined in coronal loops heated in t Author: I.M.

Livshits, M.A. Livshits, R. Pallavicini. The Sun as a Guide to Stellar Physics illustrates the significance of the Sun in understanding stars through an examination of the discoveries and insights gained from solar physics research. Ranging from theories to modeling and from numerical simulations to instrumentation and data processing, the book provides an overview of what.

The best method for determining the age and mass of a young stellar object is to place the object on the Hertzsprung-Russell (HR) diagram and to compare to theoretical evolutionary tracks.

Accurate ages allow the investigation of the temporal evolution of properties associated with stellar youth (accretion rates, X-ray activity, circumstellar. This paper outlines the current understanding of solar flares, mainly focused on magnetohydrodynamic (MHD) processes responsible for producing a flare.

Observations show that flares are one of the most explosive phenomena in the atmosphere of the Sun, releasing a huge amount of energy up to about erg on the timescale of hours. Flares involve the heating of plasma, mass Cited by: The observational data permit us to establish clear statistical correlations between different parameters of stellar flare activity and the characteristics of quiet stars.

Solar and Stellar Flares. Solar and Stellar Flares Shakhovskaya N.I. () Stellar Flare Statistics — Physical Consequences.

In: Haisch B.M., Rodonò M. (eds Cited by: the larger the stellar mass, the larger the luminosity. The radial-velocity curve of a star in a binary star system is a plot against time of the variation of Doppler shift of its spectral lines and hence of its speed toward or away from us.