328 citations · 546 across the 16 of their papers we have counts for
16 papers
Analysis methods of the flow field around decaying sunspots
Hanna Strecker, Nazaret Bello González
The moat flow, a radial outflow surrounding fully fledged sunspots, is a well characterised phenomenon. Nevertheless, its origin and especially its relation to the penumbra is stil…
Evolution of the flow field in decaying active regions, Transition from a moat flow to a supergranular flow
Hanna Strecker, Nazaret Bello González
We investigate the evolution of the horizontal flow field around sunspots during their decay by analysing its extension and horizontal velocity around eight spots using SDO/HMI Dop…
Photospheric Magnetic Fields of the Trailing Sunspots in Active Region NOAA 12396
M. Verma, H. Balthasar, C. Denker +27
The solar magnetic field is responsible for all aspects of solar activity. Sunspots are the main manifestation of the ensuing solar activity. Combining high-resolution and synoptic…
The magnetic nature of umbra-penumbra boundary in sunspots
Jan Jurčák, Reza Rezaei, Nazaret Bello González +2
Sunspots are the longest-known manifestation of solar activity, and their magnetic nature has been known for more than a century. Despite this, the boundary between umbrae and penu…
Chromospheric impact of an exploding solar granule
Catherine E. Fischer, Nazaret Bello González, Reza Rezaei
Observations of multi-wavelength and therefore height-dependent information following events throughout the solar atmosphere and unambiguously assigning a relation between these ra…
High-resolution imaging spectroscopy of two micro-pores and an arch filament system in a small emerging-flux region
S. J. González Manrique, N. Bello González, C. Denker
Aims. The purpose of this investigation is to characterize the temporal evolution of an emerging flux region, the associated photospheric and chromospheric flow fields, and the pro…
Horizontal flow fields in and around a small active region-- The transition period between flux emergence and decay
M. Verma, C. Denker, H. Balthasar +28
Aims. Combining high-resolution and synoptic observations aims to provide a comprehensive description of flux emergence at photospheric level and of the growth process that eventua…
Flows in and around active region NOAA12118 observed with the GREGOR solar telescope and SDO/HMI
M. Verma, C. Denker, H. Balthasar +28
Accurate measurements of magnetic and velocity fields in and around solar active regions are key to unlocking the mysteries of the formation and the decay of sunspots. High spatial…
Fitting peculiar spectral profiles in He I 10830 Å absorption features
S. J. González Manrique, C. Kuckein, A. Pastor Yabar +28
The new generation of solar instruments provides better spectral, spatial, and temporal resolution for a better understanding of the physical processes that take place on the Sun.…
Magnetic field reconstruction based on sunspot oscillations
J. Löhner-Böttcher, N. Bello González, W. Schmidt
The magnetic field of a sunspot guides magnetohydrodynamic waves toward higher atmospheric layers. In the upper photosphere and lower chromosphere, wave modes with periods longer t…
Signatures of running penumbral waves in sunspot photospheres
Johannes Löhner-Böttcher, Nazaret Bello González
The highly dynamic atmosphere above sunspots exhibits a wealth of magnetohydrodynamic (MHD) waves. Recent studies suggest a coupled nature of the most prominent phenomena: umbral f…
A retrospective of the GREGOR solar telescope in scientific literature
C. Denker, O. von der Lühe, A. Feller +33
In this review, we look back upon the literature, which had the GREGOR solar telescope project as its subject including science cases, telescope subsystems, and post-focus instrume…
The GREGOR Fabry-Pérot Interferometer
K. G. Puschmann, C. Denker, F. Kneer +18
The GREGOR Fabry-Pérot Interferometer (GFPI) is one of three first-light instruments of the German 1.5-meter GREGOR solar telescope at the Observatorio del Teide, Tenerife, Spain.…
Comparing simultaneous measurements by two high-resolution imaging spectropolarimeters: the `Goettingen' FPI@VTT and CRISP@SST
N. Bello González, L. Bellot Rubio, A. Ortiz +3
In July 2009, the leading spot of the active region NOAA11024 was observed simultaneously and independently with the 'Goettingen' FPI at VTT and CRISP at SST, i.e., at two differen…
The formation of a penumbra as observed with the German VTT and SoHO/MDI
Rolf Schlichenmaier, Nazaret Bello González, Reza Rezaei
The generation of magnetic flux in the solar interior and its transport to the outer solar atmosphere will be in the focus of solar physics research for the next decades. One key-i…
Sunrise: instrument, mission, data and first results
S. K. Solanki, P. Barthol, S. Danilovic +16
The Sunrise balloon-borne solar observatory consists of a 1m aperture Gregory telescope, a UV filter imager, an imaging vector polarimeter, an image stabilization system and furthe…