NAGIOS: RODERIC FUNCIONANDO

Direct assessment of SDO/HMI helioseismology of active regions on the Sun's far side using SO/PHI magnetograms

Repositori DSpace/Manakin

Valencià Castellano

Inici
Investigació
e-prints
22 - Física
Visualitza element

IMPORTANT: Aquest repositori està en una versió antiga des del 3/12/2023. La nova instal.lació está en https://roderic.uv.es/

Direct assessment of SDO/HMI helioseismology of active regions on the Sun's far side using SO/PHI magnetograms

Mostra el registre parcial de l'element

dc.contributor.author	Yang, D.
dc.contributor.author	Blanco Rodríguez, Julian
dc.contributor.author	Gasent-Blesa, José Luis
dc.contributor.author	Sanchis Kilders, Esteban
dc.contributor.author	Orozco Suárez, D.
dc.contributor.author	Alvarez Herrero, A.
dc.contributor.author	Albelo Jorge, N.
dc.contributor.author	del Toro Iniesta, J. C.
dc.contributor.author	Gutiérrez Márquez, P.
dc.contributor.author	Solanki, S.K.
dc.contributor.author	Bellot Rubio, L.R.
dc.contributor.author	Pérez Grande, Isabel
dc.date.accessioned	2023-11-27T10:57:40Z
dc.date.available	2023-11-27T10:57:40Z
dc.date.issued	2023
dc.identifier.uri	https://hdl.handle.net/10550/91450
dc.description.abstract	Context. Earth-side observations of solar p modes can be used to image and monitor magnetic activity on the Sun's far side. In this work, we use magnetograms of the far side obtained by the Polarimetric and Helioseismic Imager (PHI) on board Solar Orbiter (SO) to directly assess the validity of far-side helioseismic holography for the first time. Aims. We wish to co-locate the positions of active regions in helioseismic images and magnetograms and to calibrate the helioseismic measurements in terms of the magnetic field strength. Methods. We identified three magnetograms displaying a total of six active regions on the far side from 18 November 2020, 3 October 2021, and 3 February 2022. The first two dates are from the SO cruise phase and the third is from the beginning of the nominal operation phase. We computed contemporaneous seismic phase maps for these three dates using helioseismic holography applied to the time series of Dopplergrams from the Helioseismic and Magnetic Imager (HMI) at the Solar Dynamics Observatory (SDO). Results. Among the six active regions seen in SO/PHI magnetograms, five of them are identified on the seismic maps at almost the same positions as on the magnetograms. One region is too weak to be detected above the seismic noise. To calibrate the seismic maps, we fit a linear relationship between the seismic phase shifts and the unsigned line-of-sight magnetic field averaged over the active region areas extracted from the SO/PHI magnetograms. Conclusions. SO/PHI provides the strongest evidence so far that helioseismic imaging is able to provide reliable information on active regions on the far side, including their positions, areas, and the mean unsigned magnetic field.
dc.language.iso	eng
dc.relation.ispartof	Astronomy and Astrophysics, 2023, vol. 674, num. A183, p. 1-9
dc.source	Yang, D., Blanco Rodríguez, Julian, Gasent-Blesa, José Luis, Sanchis Kilders, Esteban, Orozco Suárez, D., Alvarez Herrero, A., Albelo Jorge, N., del Toro Iniesta, J.C., Gutiérrez Márquez, P., Solanki, S.K., Bellot Rubio, L.R., Pérez Grande, Isabel (2023). Direct assessment of SDO/HMI helioseismology of active regions on the Sun's far side using SO/PHI magnetograms. Astronomy and Astrophysics, 674 A183 1 9. https://doi.org/10.1051/0004-6361/202346030
dc.subject	astronomia
dc.subject	física
dc.subject	Física
dc.subject	electrònica
dc.subject	helioseismology
dc.subject	photosphere
dc.subject	magnetic fields
dc.subject	sun activity
dc.title	Direct assessment of SDO/HMI helioseismology of active regions on the Sun's far side using SO/PHI magnetograms
dc.type	journal article
dc.date.updated	2023-11-27T10:57:40Z
dc.identifier.doi	10.1051/0004-6361/202346030
dc.identifier.idgrec	162133
dc.rights.accessRights	open access