Zobrazeno 1 - 10
of 15
pro vyhledávání: '"L. K. Harra-Murnion"'
Publikováno v:
Advances in Space Research. 25:1747-1750
The recent solar minimum has allowed studies to be made of quiet-Sun structures with SOHO instruments with better resolution than before. This paper reports on the morphology and dynamics of the EUV emission, including the chromospheric and transitio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f256bccb651c71c042cd8af670b59cf6
https://doi.org/10.1016/s0273-1177(99)00585-2
https://doi.org/10.1016/s0273-1177(99)00585-2
Autor:
K. J. H. Phillips, R. Mewe, Peter Beiersdorfer, Jelle Kaastra, Duane A. Liedahl, Gregory V. Brown, L. K. Harra-Murnion
Publikováno v:
Astronomy and Astrophysics Supplement Series. 138:381-393
With the likelihood that high-resolution soft X-ray spectra of non-solar astronomical sources will soon become available, it is desirable to examine the accuracy of spectral synthesis codes. In this paper, a benchmark study of the MEKAL code, extensi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ccb194b0ccb1793303b47dea6f7f130e
https://doi.org/10.1051/aas:1999282
https://doi.org/10.1051/aas:1999282
Publikováno v:
Solar Physics. 185:323-350
We analyse four solar flares which have energetic hard X-ray emissions, but unusually low soft X-ray flux and GOES class (C1.0–C5.5). These are compared with two other flares that have soft and hard X-ray emission consistent with a generally observ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5d277d0e2d3a2e32e6d6b6455649d2a
https://doi.org/10.1023/a:1005176932415
https://doi.org/10.1023/a:1005176932415
Publikováno v:
Solar Physics. 189:181-198
In selected flares that occurred in AR 7260, we have studied the geometry of the brightest soft X-ray loop by tracing it on an image. Even under the assumption that the loop is contained in a plane, it is clear that a single image does not permit us
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0ba080b2e802c0ba83e0914b0b35bd84
https://doi.org/10.1023/a:1005290426454
https://doi.org/10.1023/a:1005290426454
Publikováno v:
Solar Physics. 182:447-457
A thermal subflare occurring on 27 October 1993 was observed during a multi-wavelength campaign with the Yohkoh spacecraft and the Multi-channel Subtractive Double-Pass spectrograph (MSDP) at Pic du Midi. The various instruments provided us with 2-D
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e69120f97130388512528bd46fd82539
https://doi.org/10.1023/a:1005040821593
https://doi.org/10.1023/a:1005040821593
Publikováno v:
The Astrophysical Journal. 479:464-469
Previous examinations of line broadening in solar flares have tended to concentrate on large GOES (Geostationary Operational Environmental Satellite) classification events. Because of the sensitivity of the Yohkoh Bragg crystal spectrometer, it is po
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0bb017e202a8703790050a044d6eb8cb
https://doi.org/10.1086/303857
https://doi.org/10.1086/303857
Autor:
L. K. Harra-Murnion, Hugh S. Hudson, Alphonse C. Sterling, J. L. Culhane, T. Kato, T. Fujiwara
Publikováno v:
Solar Physics. 171:103-122
We analyse the physical characteristics of a C5.7 class flare which was observed on 27 September, 1993 using data from the soft X-ray telescope (SXT), the Bragg crystal spectrometer (BCS), and the hard X-ray telescope (HXT) on Yohkoh. The flare takes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5e21a41a8dfadd934c7a56e020cc686
https://doi.org/10.1023/a:1004903027543
https://doi.org/10.1023/a:1004903027543
Publikováno v:
Physica Scripta. 51:346-350
Collision strengths and Maxwellian averaged collision rates are calculated for intercombination and forbidden transitions from the 1s2 1S ground state to the 1s2l and 1s3l levels in He-like Ni XXVII, using the Dirac and Breit-Pauli R-matrix codes. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::303375863010d0cfe6cd1813255686d6
https://doi.org/10.1088/0031-8949/51/3/011
https://doi.org/10.1088/0031-8949/51/3/011
Autor:
Sarah A. Matthews, L. K. Harra-Murnion
Publikováno v:
Astrophysics and Space Science Library ISBN: 9789401061988
The relationship between structures in the transition region and corona is not well understood, and this knowledge is vital for a complete understanding of the heating of active region plasma. There have been many previous studies of active regions i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f843909bf3c6919f6bac85579cb8c188
https://doi.org/10.1007/978-94-011-5220-4_40
https://doi.org/10.1007/978-94-011-5220-4_40
Publikováno v:
Astrophysics and Space Science Library ISBN: 9789401061988
In this extended abstract we discuss the measurement and interpretation of the excess line broadening of soft X-ray lines above their thermal width, characterized by non-thermal velocity, and its importance in understanding the initial energy release
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bceace9643499392a183e152791c2789
https://doi.org/10.1007/978-94-011-5220-4_18
https://doi.org/10.1007/978-94-011-5220-4_18