Zobrazeno 1 - 10
of 68
pro vyhledávání: '"Ramelli, Renzo"'
Publikováno v:
Solar Physics, Volume 296, Issue 9, article id.137, 2021
The recalibration of the sunspot number series, the primary long-term record of the solar cycle, requires the recovery of the entire collection of raw sunspot counts collected by the Zurich Observatory for the production of this index between 1849 an
Externí odkaz:
http://arxiv.org/abs/2301.02429
Publikováno v:
A&A 662, A46 (2022)
Observations of scattering polarization and the Hanle effect in various spectral lines are increasingly used to complement traditional solar magnetic field determination techniques. One of the strongest scattering polarization signals in the photosph
Externí odkaz:
http://arxiv.org/abs/2202.08659
Autor:
Dhara, Sajal Kumar, Capozzi, Emilia, Gisler, Daniel, Bianda, Michele, Ramelli, Renzo, Berdyugina, Svetlana, Alsina, Ernest, Belluzzi, Luca
The Sr~{\sc i} 4607~\AA\ spectral line shows one of the strongest scattering polarization signals in the visible solar spectrum. The amplitude of this polarization signal is expected to vary at granular spatial scales, due to the combined action of t
Externí odkaz:
http://arxiv.org/abs/1908.03366
Autor:
Dhara, Sajal Kumar, Capozzi, Emilia, Gisler, Daniel, Bianda, Michele, Ramelli, Renzo, Berdyugina, Svetlana, Alsina, Ernest, Belluzzi, Luca
Sr I 4607\AA spectral line shows one of the strongest scattering polarization signals in the visible solar spectrum. The amplitudes of these signals are expected to vary at granular spatial scales. This variation can be due to changes in the magnetic
Externí odkaz:
http://arxiv.org/abs/1904.03986
Sunspot observations and counting are carried out at the Specola Solare Ticinese in Locarno since 1957 when it was built as an external observing station of the Zurich observatory. When in 1980 the data center responsibility was transferred from ETH
Externí odkaz:
http://arxiv.org/abs/1805.09202
The solar photosphere is filled by a magnetic field which is tangled on scales much smaller than the resolution capability of solar telescopes. This hidden magnetic field can be investigated via the Hanle effect. In 2007 we started a synoptic program
Externí odkaz:
http://arxiv.org/abs/1708.03287
Specola Solare Ticinese is an observatory dedicated to Sunspot Number counting, which was constructed in 1957 in Locarno, Southern Switzerland, as an external observing station of the Zurich Federal Observatory. When in 1981 the responsibility of the
Externí odkaz:
http://arxiv.org/abs/1602.07998
Publikováno v:
2012SoPh..281..697W
The only prominent line of singly ionized helium in the visible spectral range, helium-II 4686 A, is observed together with the helium-I 5015 A singlet and the helium-I 4471 A triplet line in solar prominences. The sodium emission, NaD2, is used as a
Externí odkaz:
http://arxiv.org/abs/1208.2153
Autor:
Sigismondi, Costantino, Raponi, Andrea, De Rosi, Giulia, Bianda, Michele, Ramelli, Renzo, Caccia, Massimo, Maspero, Matteo, Negrini, Loretta, Wang, Xiaofan
Measurements of the power spectrum of the seeing in the range 0.001-1 Hz have been performed in order to understand the criticity of the transits' method for solar diameter monitoring.
Comment: 3 pages, 3 figures, proc. of the Fourth French-Chin
Comment: 3 pages, 3 figures, proc. of the Fourth French-Chin
Externí odkaz:
http://arxiv.org/abs/1112.6187
Autor:
Sigismondi, Costantino, Raponi, Andrea, Wang, Xiaofan, De Rosi, Giulia, Bianda, Michele, Ramelli, Renzo
Measurements of the power spectrum of the atmospheric seeing in the line of sight of the Sun, in the range 0.001-1 Hz, have been performed in Santa Maria degli Angeli Lucernaria Dome, at IRSOL and in Huairou Station. This study is aimed to understand
Externí odkaz:
http://arxiv.org/abs/1112.0401