Zobrazeno 1 - 10
of 326
pro vyhledávání: '"M J Martinez"'
Autor:
Pozuelo, S. Esteban, Ramos, A. Asensio, Rodríguez, J. de la Cruz, Bueno, J. Trujillo, González, M. J. Martínez
Publikováno v:
A&A 672, A141 (2023)
Details of the magnetic field in the quiet Sun chromosphere are key to our understanding of essential aspects of the solar atmosphere. We aim to determine the longitudinal magnetic field component (B_lon) of quiet Sun regions depending on their size.
Externí odkaz:
http://arxiv.org/abs/2302.04258
Autor:
U. Lavín, M. J. Martinez-Harms, J. L Celis-Diez, J. P Francois, Y. Aguirre, J. Martínez-Harms
Publikováno v:
Ecosystems and People, Vol 20, Iss 1 (2024)
Wild pollinators play a crucial role in maintaining healthy ecosystems and sustaining agricultural productivity. However, their survival is at risk due to habitat loss and land use changes, exacerbating the ongoing biodiversity crisis, and jeopardisi
Externí odkaz:
https://doaj.org/article/aa08efcd13074941bfd82ede8cd8df7f
The Sun is the only star where we can resolve the intricate magnetism that all convective stars harbor. Yet, more than 99% of its visible surface along the solar cycle (the so-called quiet Sun) is filled with a tangled, unresolved magnetism. These "h
Externí odkaz:
http://arxiv.org/abs/2106.10546
Publikováno v:
A&A 648, A68 (2021)
Both the quality and amount of astrophysical data are steadily increasing over time owing to the improvement of telescopes and their instruments. This requires corresponding evolution of the techniques used for obtaining and analyzing the resulting d
Externí odkaz:
http://arxiv.org/abs/2103.04160
Publikováno v:
A&A 635, A210 (2020)
Aims. We aim to characterise the magnetism of a large fraction of the north polar region close to a maximum of activity, when the polar regions are reversing their dominant polarity. Methods. We make use of full spectropolarimetric data from the CRis
Externí odkaz:
http://arxiv.org/abs/2003.04267
Publikováno v:
A&A 625, A129 (2019)
Our aim is to demonstrate the limitations of using a single component model to study the magnetic field of an active region filament. For that we have analyzed the polarimetric signals of the He I 10830 A multiplet acquired with the infrared spectrog
Externí odkaz:
http://arxiv.org/abs/1904.10688
Publikováno v:
A&A 625, A128 (2019)
The determination of the magnetic filed vector in solar filaments is possible by interpreting the Hanle and Zeeman effects in suitable chromospheric spectral lines like those of the He I multiplet at 10830 A. We study the vector magnetic field of an
Externí odkaz:
http://arxiv.org/abs/1904.09593
Publikováno v:
A&A 623, A178 (2019)
In this study we explore the diagnostic potential of the chromospheric Ca II line at 8542A for studying the magnetic and dynamic properties of solar filaments. We have acquired high spatial resolution spectropolarimetric observations in the Ca II 854
Externí odkaz:
http://arxiv.org/abs/1902.06574
Autor:
González, M. J. Martínez, González-Fernández, C., Ramos, A. Asensio, Navarro, H. Socas, Plaza, C. Westendorp, Boyajian, T. S., Wright, J. T., Cameron, A. Collier, Hernández, J. González, Holgado, G., Kennedy, G. M., Masseron, T., Molinari, E., Saario, J., Simón-Díaz, S., Toledo-Padrón, B.
Boyajian's star is an apparently normal main sequence F-type star with a very unusual light curve. The dipping activity of the star, discovered during the Kepler mission, presents deep, asymmetric, and aperiodic events. Here we present high resolutio
Externí odkaz:
http://arxiv.org/abs/1812.06837
Publikováno v:
Volume 453, Issue 1, 2015, p.L69-L72
Regardless of the physical origin of stellar magnetic fields - fossil or dynamo induced - an inclination angle between the magnetic and rotation axes is very often observed. Absence of observational evidence in this direction in the solar case has le
Externí odkaz:
http://arxiv.org/abs/1804.09748