Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Ø. Wikstøl"'
Autor:
P. Maltby, N. Brynildsen, P. Brekke, Stein Vidar Hagfors Haugan, Ø. Wikstøl, O. Kjeldseth-Moe
Publikováno v:
Advances in Space Research. 25:1743-1746
Based on simultaneous observations of 10 EUV emission lines with the Coronal Diagnostic Spectrometer — CDS on the Solar and Heliospheric Observatory — SOHO we study the spatial distributions of both line emission and line-of-sight velocity in the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b8899f62558818898fdd1cf96c900fa6
https://doi.org/10.1016/s0273-1177(99)00584-0
https://doi.org/10.1016/s0273-1177(99)00584-0
Publikováno v:
The Astrophysical Journal. 502:981-996
We study high signal-to-noise profiles of O IV emission lines obtained using the SUMER instrument on SOHO. Data for the quiet Sun obtained close to the disk center and at the solar limb were acquired. After careful data processing in which disk data
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3df4d97f8870556cc750b4ea76558039
https://doi.org/10.1086/305915
https://doi.org/10.1086/305915
Publikováno v:
The Astrophysical Journal. 501:895-910
We reexamine the issue of inferring physical properties of solar plasmas using EUV and UV observations. We focus on the question of whether one can determine if typical structures seen as bright in typical "transition-region" lines are formed in the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d9d07dd607020ce1835b707c9772b32
https://doi.org/10.1086/305854
https://doi.org/10.1086/305854
Publikováno v:
The Astrophysical Journal. 483:972-983
Time-dependent dynamical calculations of the radiating gas in solar coronal flux tubes are used to identify features of UV spectral-line profiles that can reveal the direction in which wave energy flows through the solar transition region. The profil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aac30c764be600d86315a28f36a9b6fb
https://doi.org/10.1086/304278
https://doi.org/10.1086/304278
Publikováno v:
Advances in Space Research. 20:2289-2292
Using time-dependent dynamical models of the radiating gas in coronal flux tubes, we identify features in UV spectral line profiles that can reveal the direction in which energy flows through the solar transition region, in observations without tempo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df98ad9f926145d217c7f618b4977064
https://doi.org/10.1016/s0273-1177(97)00899-5
https://doi.org/10.1016/s0273-1177(97)00899-5
Autor:
Viggo Hansteen, Ø. Wikstøl
Publikováno v:
Space Science Reviews. 70:103-106
Spectral emission lines created in the solar chromosphere — corona transition region show net red-shifts. It has been proposed that this may be the result of the return of spicular material. We simulate a spicule numerically using the rebound shock
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3733812ef3641e487e05cc31ad6c4b4e
https://doi.org/10.1007/bf00777851
https://doi.org/10.1007/bf00777851
Autor:
P. Maltby, Stein Vidar Hagfors Haugan, Ø. Wikstøl, Pål H. Brekke, O. Kjeldseth-Moe, T. Rimmele, N. Brynildsen
Publikováno v:
The Astrophysical Journal. 496:L117-L119
Bright EUV sunspot plumes have been observed in five out of nine sunspot regions with the Coronal Diagnostic Spectrometer on the Solar and Heliospheric Observatory. In the other four regions, the brightest line emissions may appear inside the sunspot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d5bd37d6391d0e5931fa8a4dc7588d77
https://doi.org/10.1086/311261
https://doi.org/10.1086/311261
Autor:
V. H. Hansteen, Ø. WikstØl
Publikováno v:
Magnetodynamic Phenomena in the Solar Atmosphere ISBN: 9789401066273
The optically thin radiative loss function, ƒ(T) ≡ Lr/ ne nH, where Lr represents the radiative losses (erg/s/cm−3) and ne, nH the electron and hydrogen number densities is an important quantity in the energetics of coronal and transition region
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7136995b6c6b12e06bd376bec77afdf9
https://doi.org/10.1007/978-94-009-0315-9_98
https://doi.org/10.1007/978-94-009-0315-9_98
Autor:
Ø. Wikstøl, Viggo Hansteen
Publikováno v:
Mass Supply and Flows in the Solar Corona ISBN: 9789401044011
Spectral emission lines created in the solar chromosphere-corona transition region show net red-shifts. It has been proposed that this may be the result of the return of spicular material. We simulate a spicule numerically using the rebound shock mod
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9d18b611130f6cf19d1aad2ad3bc8721
https://doi.org/10.1007/978-94-011-0930-7_18
https://doi.org/10.1007/978-94-011-0930-7_18
Autor:
O. Kjeldseth-Moe, N. Brynildsen, Ø. Wikstøl, Stein Vidar Hagfors Haugan, P. Maltby, Pål H. Brekke, T. Fredvik
Publikováno v:
The Astrophysical Journal. 504:L135-L135
Bright EUV sunspot plumes have been observed in eight out of eleven different sunspot regions with the Coronal Diagnostic Spectrometer -- CDS on SOHO. From wavelength shifts we derive the line-of-sight velocity, relative to the average velocity in th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb4e1f283fb64b88a080a8ededeeac1b
https://doi.org/10.1086/311589
https://doi.org/10.1086/311589