Zobrazeno 1 - 10
of 501
pro vyhledávání: '"Casini R"'
We extend the spherical tensorial formalism for polarization to the treatment of electric- and magnetic-multipole transitions of any order. We rely on the spherical-wave expansion to derive the tensor form of the operator describing the interaction o
Externí odkaz:
http://arxiv.org/abs/2409.01197
This paper identifies spectral lines from X-ray to infrared wavelengths which are optimally suited to measuring vector magnetic fields as high as possible in the solar atmosphere. Instrumental and Earth's atmospheric properties, as well as solar abun
Externí odkaz:
http://arxiv.org/abs/2211.07770
Autor:
Shultz, M. E., Casini, R., Cheung, M. C. M., David-Uraz, A., Alemán, T. del Pino, Erba, C., Folsom, C. P., Gayley, K., Ignace, R., Keszthelyi, Z., Kochukhov, O., Nazé, Y., Neiner, C., Oksala, M., Petit, V., Scowen, P. A., Sudnik, N., ud-Doula, A., Vink, J. S., Wade, G. A.
Polstar is a proposed NASA MIDEX space telescope that will provide high-resolution, simultaneous full-Stokes spectropolarimetry in the far ultraviolet, together with low-resolution linear polarimetry in the near ultraviolet. This observatory offers u
Externí odkaz:
http://arxiv.org/abs/2207.12970
Autor:
Folsom, C. P., Ignace, R., Erba, C., Casini, R., Alemán, T. del Pino, Gayley, K., Hobbs, K., Sainz, R. Manso, Neiner, C., Petit, V., Shultz, M. E., Wade, G. A.
Magnetic fields are important for stellar photospheres and magnetospheres, influencing photospheric physics and sculpting stellar winds. Observations of stellar magnetic fields are typically made in the visible, although infrared observations are bec
Externí odkaz:
http://arxiv.org/abs/2207.01865
We present the Tenerife Inversion Code (TIC), which has been developed to infer the magnetic and plasma properties of the solar chromosphere and transition region via full-Stokes inversion of polarized spectral lines. The code is based on the HanleRT
Externí odkaz:
http://arxiv.org/abs/2205.15666
Autor:
de Wijn, A. G., Casini, R., Carlile, A., Lecinski, A. R., Sewell, S., Zmarzly, P., Eigenbrot, A. D., Beck, C., Wöger, F., Knölker, M.
Publikováno v:
Solar Physics, Volume 297, Issue 2, article id.22 (2022)
The Daniel K. Inouye Solar Telescope (DKIST) Visible Spectro-Polarimeter (ViSP) is a traditional slit-scanning spectrograph, with the ability to observe solar regions up to a $120\times78~\mathrm{arcsec}^2$ area. The design implements dual-beam polar
Externí odkaz:
http://arxiv.org/abs/2203.00117
Autor:
Shultz, M. E., Casini, R., Cheung, M. C. M., David-Uraz, A., Alemán, T. del Pino, Erba, C., Folsom, C. P., Gayley, K., Ignace, R., Keszthelyi, Z., Kochukhov, O., Nazé, Y., Neiner, C., Oksala, M., Petit, V., Scowen, P. A., Sudnik, N., ud-Doula, A., Vink, J. S., Wade, G. A.
Polstar is a proposed NASA MIDEX space telescope that will provide high-resolution, simultaneous full-Stokes spectropolarimetry in the far ultraviolet, together with low-resolution linear polarimetry in the near ultraviolet. In this white paper, we d
Externí odkaz:
http://arxiv.org/abs/2111.06434
Publikováno v:
2020, The Astrophysical Journal, Volume 891, Issue 1, id.91
We carry out a theoretical study of the polarization of the solar Mg II h-k doublet (including its extended wings) and the subordinate UV triplet around 280 nm. These lines are of great diagnostic interest, as they encode information on the physical
Externí odkaz:
http://arxiv.org/abs/2004.09176
We report on spectropolarimetric observations across the Mg II h and k-lines at 2800 angstrom made by the Ultraviolet Spectrometer and Polarimeter onboard the Solar Maximum Mission satellite. Our analysis confirms the strong linear polarization in th
Externí odkaz:
http://arxiv.org/abs/1909.05574
Publikováno v:
Astrophys. J. 2018, 867, L22
We realized a laboratory experiment to study the scattering polarization of the Na I D-doublet at 589.0 and 589.6 nm in the presence of a magnetic field. This work was stimulated by solar observations of that doublet, which have proven particularly c
Externí odkaz:
http://arxiv.org/abs/1811.07090