Now showing items 1-20 of 33

  • da Silva Santos, João Manuel; de la Cruz Rodriguez, Jaime; White, S. M.; Leenaarts, Jorrit; Vissers, Gregal Joan Maria; Hansteen, Viggo (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Aims. We aim to investigate the temperature enhancements and formation heights of solar active-region brightenings such as Ellerman bombs (EBs), ultraviolet bursts (UVBs), and flaring active-region fibrils (FAFs) using ...
  • Gošić, Milan; de la Cruz Rodriguez, Jaime; De Pontieu, Bart Walter; Bellot Rubio, L. R.; Carlsson, Mats; Esteban Pozuelo, S.; Ortiz, Ada; Polito, Vanessa (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    The heating of the solar chromosphere remains one of the most important questions in solar physics. Our current understanding is that small-scale internetwork (IN) magnetic fields play an important role as a heating agent. ...
  • Leenarts, Jorrit; de la Cruz Rodriguez, Jaime; Danilovic, Sanja; Scharmer, Göran B.; Carlsson, Mats (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Context: The radiative losses in the solar chromosphere vary from 4 kW m−2 in the quiet Sun, to 20 kW m−2 in active regions. The mechanisms that transport non-thermal energy to and deposit it in the chromosphere are still ...
  • Martinez-Sykora, Juan; de la Cruz Rodriguez, Jaime; Gošić, Milan; Sainz Dalda, Alberto; Hansteen, Viggo Haraldson; De Pontieu, Bart Walter (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Abstract The heating of the chromosphere in internetwork regions remains one of the foremost open questions in solar physics. In the present study, we tackle this old problem by using a very-high-spatial-resolution ...
  • Quintero Noda, C.; Shimizu, T.; Katsukawa, Y.; de la Cruz Rodriguez, Jaime; Carlsson, Mats; Anan, T.; Oba, T.; Ichimoto, K.; Suematsu, Y. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    Future solar missions and ground-based telescopes aim to understand the magnetism of the solar chromosphere. We performed a supporting study in Quintero Noda et al. focused on the infrared Ca ii 8542 Å line and we concluded ...
  • Quintero Noda, C.; Kato, Yoshiaki; Katsukawa, Y.; Oba, T.; de la Cruz Rodriguez, Jaime; Carlsson, Mats; Shimizu, T.; Orozco Suarez, D.; Ruiz Cobo, B.; Kubo, M.; Anan, T.; Ichimoto, K.; Suematsu, Y. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    Future solar missions and ground-based telescopes aim to understand the magnetism of the solar chromosphere. We performed a supporting study in Quintero Noda et al. focused on the infrared Ca ii 8542 Å line and we concluded ...
  • Quintero Noda, Carlos; Iijima, H.; Katsukawa, Y.; Shimizu, T.; Carlsson, Mats; de la Cruz Rodriguez, Jaime; Ruiz Cobo, B.; Orozco Suarez, D.; Oba, T.; Anan, T.; Kubo, M.; Kawabata, Y.; Ichimoto, K.; Suematsu, Y. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    We investigate the diagnostic potential of the spectral lines at 850 nm for understanding the magnetism of the lower atmosphere. For that purpose, we use a newly developed 3D simulation of a chromospheric jet to check the ...
  • de la Cruz Rodriguez, Jaime; Löfdahl, M.G.; Sütterlin, P.; Hillberg, T.; Rouppe, Van Der Voort Luc (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    The production of science-ready data from major solar telescopes requires expertise beyond that of the typical observer. This is a consequence of the increasing complexity of instruments and observing sequences, which ...
  • Díaz Baso, Carlos José; Rouppe van der Voort, Luc; de la Cruz Rodriguez, Jaime; Leenaarts, Jorrit (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Context. Fabry–Pérot interferometers (FPIs) have become very popular in solar observations because they offer a balance between cadence, spatial resolution, and spectral resolution through a careful design of the spectral ...
  • Vissers, Gregal Joan Maria; de la Cruz Rodriguez, Jaime; Libbrecht, Tine; Rouppe van der Voort, Luc; Scharmer, Göran B.; Carlsson, Mats (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Ellerman bombs and UV bursts are transient brightenings that are ubiquitously observed in the lower atmospheres of active and emerging flux regions. As they are believed to pinpoint sites of magnetic reconnection in ...
  • Felipe, Tobias; de Jorge Henriques, Vasco Manuel; de la Cruz Rodriguez, Jaime; Socas-Navarro, Hector (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Context. Umbral flashes are sudden brightenings commonly visible in the core of some chromospheric lines. Theoretical and numerical modeling suggests that they are produced by the propagation of shock waves. According to ...
  • Cristaldi, A.; Guglielmino, S. L.; Zuccarello, F.; Romano, P.; Falco, M.; Rouppe, Van Der Voort Luc; de la Cruz Rodriguez, Jaime; Ermolli, I.; Criscuoli, S. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
    Delta (δ) spots are complex magnetic configurations of sunspots characterized by umbrae of opposite polarity sharing a common penumbra. In order to investigate the fine structure of the region separating the two magnetic ...
  • Leenaarts, Jorrit; de la Cruz Rodriguez, Jaime; Kochukhov, Oleg; Carlsson, Mats (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
    The Ca II 854.2 nm spectral line is a common diagnostic of the solar chromosphere. The average line profile shows an asymmetric core, and its bisector shows a characteristic inverse-C shape. The line actually consists of ...
  • Ortiz, Ada; Bellot Rubio, L. R.; Hansteen, Viggo; de la Cruz Rodriguez, Jaime; Rouppe, Van Der Voort Luc (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
    We study a granular-sized magnetic flux emergence event that occurred in NOAA 11024 in 2009 July. The observations were made with the CRISP spectropolarimeter at the Swedish 1 m Solar Telescope achieving a spatial resolution ...
  • de la Cruz Rodriguez, Jaime; Hansteen, Viggo; Bellot-Rubio, Luis; Ortiz, Ada (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    Magnetic flux emergence into the outer layers of the Sun is a fundamental mechanism for releasing energy into the chromosphere and the corona. In this paper, we study the emergence of granular-sized flux concentrations and ...
  • Ortiz, Ada; Hansteen, Viggo; Bellot Rubio, L. R.; de la Cruz Rodriguez, Jaime; De Pontieu, Bart Walter; Carlsson, Mats; Rouppe, Van Der Voort Luc (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
    We study, for the first time, the ascent of granular-sized magnetic bubbles from the solar photosphere through the chromosphere into the transition region and above. Such events occurred in a flux emerging region in NOAA ...
  • Robustini, Carolina; Leenaarts, Jorrit; de la Cruz Rodriguez, Jaime; Rouppe, Van Der Voort Luc (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
    We report on a fan-shaped set of high-speed jets above a strongly magnetized light bridge (LB) of a sunspot observed in the Hα line. We study the origin, dynamics, and thermal properties of the jets using high-resolution ...
  • de la Cruz Rodriguez, Jaime; De Pontieu, Bart; Carlsson, Mats; Rouppe, Van Der Voort Luc (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
    The heating of the Sun's chromosphere remains poorly understood. While progress has been made on understanding what drives the quiet-Sun internetwork chromosphere, chromospheric heating in strong magnetic field regions ...
  • Rouppe van der Voort, Luc; De Pontieu, Bart Walter; Carlsson, Mats; de la Cruz Rodriguez, Jaime; Bose, Souvik; Chintzoglou, Georgios; Drews, Ainar; Froment, Clara; Gošić, Milan; Graham, David R.; Hansteen, Viggo; de Jorge Henriques, Vasco Manuel; Jafarzadeh, Shahin; Joshi, Jayant; Kleint, Lucia; Kohutova, Petra; Leifsen, Torben; Martinez-Sykora, Juan; Nóbrega Siverio, Daniel Elias; Ortiz, Ada; Mendes Domingos Pereira, Tiago; Popovas, Andrius; Quintero Noda, Carlos; Sainz Dalda, Alberto; Scharmer, Göran B.; Schmit, Donald; Scullion, Eamon; Skogsrud, Håkon; Szydlarski, Mikolaj Marcin; Timmons, R.; Vissers, Gregal Joan Maria; Woods, M. M.; Zacharias, Pia (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    NASA’s Interface Region Imaging Spectrograph (IRIS) provides high-resolution observations of the solar atmosphere through ultraviolet spectroscopy and imaging. Since the launch of IRIS in June 2013, we have conducted ...
  • de Jorge Henriques, Vasco Manuel; Mathioudakis, M.; Socas-Navarro, H.; de la Cruz Rodriguez, Jaime (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    We perform non-LTE inversions in a large set of umbral flashes, including the dark fibrils visible within them, and in the quiescent umbra by using the inversion code NICOLE on a set of full Stokes high-resolution Ca ii ...