Zobrazeno 1 - 10
of 69
pro vyhledávání: '"N. Brynildsen"'
Publikováno v:
Solar Physics. 221:237-260
The results of simultaneous observations of oscillations in the chromosphere, transition region, and corona above nine sunspots are presented. The data are obtained through coordinated observing with the Solar and Heliospheric Observatory — SOHO an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c7ce5273541c983e396417bdc93dd45
https://doi.org/10.1023/b:sola.0000035065.10112.fc
https://doi.org/10.1023/b:sola.0000035065.10112.fc
Publikováno v:
Advances in Space Research. 32:1097-1102
We have recently observed thirteen sunspots, both with CDS on SOHO and TRACE. For each sunspot we investigate the oscillations in the chromosphere, transition region and corona. Above the umbra the power spectra show one dominant peak corresponding t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c160f7489474b1459762bb8c130ff7d8
https://doi.org/10.1016/s0273-1177(03)00312-0
https://doi.org/10.1016/s0273-1177(03)00312-0
Publikováno v:
Astronomy & Astrophysics. 398:L15-L18
We explore a new approach to the investigation of optically thin emission lines by comparing the intensity variations in opposite wings of the spectral lines and apply the method to investigate the oscillations above sunspots. The observations show t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db7ddef36c1384d50108aa1f7350dc7d
https://doi.org/10.1051/0004-6361:20021848
https://doi.org/10.1051/0004-6361:20021848
Publikováno v:
Solar Physics. 207:259-290
The 3-min oscillations in the sunspot atmosphere are discussed, based on joint observing with the Transition Region and Coronal Explorer – TRACE and the Solar and Heliospheric Observatory – SOHO. We find that the oscillation amplitude above the u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce70f6f94b3a03774aea66cbe7778313
https://doi.org/10.1023/a:1016238317702
https://doi.org/10.1023/a:1016238317702
Publikováno v:
Advances in Space Research. 30:529-534
The non-uniform spatial distributions of emission and wavelength shift in ten EUV lines formed in the chromosphere, transition region and corona above 50 sunspots are investigated, based on observations with the Coronal Diagnostic Spectrometer on the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7565dfe1749b3d60567ab1e906616c8c
https://doi.org/10.1016/s0273-1177(02)00336-8
https://doi.org/10.1016/s0273-1177(02)00336-8
Publikováno v:
Astronomy & Astrophysics. 373:L1-L4
The suggestion that sunspot transition region oscillations are a typical feature of the sunspot plumes is examined. The present observations show 3 min oscillations in the umbra that end at the umbral rim. We nd that sunspot plumes located above the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::870e2577833f2dd7545a94fc0efbbecc
https://doi.org/10.1051/0004-6361:20010578
https://doi.org/10.1051/0004-6361:20010578
Publikováno v:
The Astrophysical Journal. 552:L77-L80
New knowledge about sunspot transition region lines that deviate significantly from a Gaussian shape are presented. Attention is given to "multiple flows," a line profile phenomenon in which two or more distinct velocities are observed within the sam
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ddfaded11a60d750dc811a6ffc456e98
https://doi.org/10.1086/320263
https://doi.org/10.1086/320263
Publikováno v:
Solar Physics. 198:89-131
It is well known that sunspots are dark. This statement is not correct in the sunspot atmosphere between the chromosphere and the corona, where sunspots often are brighter than their surroundings. The brightest feature in the sunspot transition regio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::773889f7c60d17d7f9d1a65d35575f9b
https://doi.org/10.1023/a:1005271605318
https://doi.org/10.1023/a:1005271605318
Publikováno v:
Advances in Space Research. 26:457-460
We report on observations with SUMER on SOHO of high-velocity events, also called explosive events. The high spatial and spectral resolutions of SUMER allow simultaneous observations of EUV emission lines formed at different temperatures within the t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6cf04d13e9edbafa89f52e81ce3ba7e1
https://doi.org/10.1016/s0273-1177(99)01086-8
https://doi.org/10.1016/s0273-1177(99)01086-8
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