International audienceWe study periodicities of dark mottles and grains observed in high spatial and temporal resolution Halpha 2-D intensity and velocity images, obtained with the Multichannel Subtractive Double Pass (MSDP) spectrograph at THEMIS in Tenerife, Canary Islands. Intensity and velocity variations of individual mottles and grains, as well as of large regions containing a substantial number of these structures are examined with a wavelet analysis which provides the temporal distribution of periods and with a randomization method that gives the respective probabilities associated with them. The wavelet analysis, which shows that velocity variations are the dominant ones, results in a wide range of periods, from 100 to 500 s, with ...
Aims. The main goal of this work is to analyze the structural and temporal evolution of small-scale ...
We report observations of small-scale swirls seen in the solar chromosphere. They are typically 2 Mm...
A 45 min time series of two-dimensional spectra has been obtained with the Vacuum Tower Telescope a...
International audienceWe study periodicities of dark mottles and grains observed in high spatial and...
We study periodicities of dark mottles and grains observed in high spatial and temporal resolution $...
On the nature of the chromospheric fine structure II. Intensity and velocity oscillations of dark mo...
In this work, we study the periodicities of oscillations in dark fine structures using observations ...
A number of recent investigations have revealed that transverse waves are ubiquitous in the solar ch...
Context. In the past, chromospheric features were mostly studied by analyzing observations performed...
A number of recent investigations have revealed that transverse waves are ubiquitous in the solar ch...
Context.Ca bright grains are small and repetitive brightenings ubiquitously found in the quiet Sun.A...
We characterize waves in small magnetic elements and investigate their propagation in the lower sola...
In April 2002, H_alpha observations of the solar chromosphere with high spatial and spectral resolut...
High-resolution ${\rm H\alpha}$ observations of a solar region containing several mottles are analyz...
Aims. By analyzing TRACE (Transition Region and Coronal Explorer) data, we investigate intensity osc...
Aims. The main goal of this work is to analyze the structural and temporal evolution of small-scale ...
We report observations of small-scale swirls seen in the solar chromosphere. They are typically 2 Mm...
A 45 min time series of two-dimensional spectra has been obtained with the Vacuum Tower Telescope a...
International audienceWe study periodicities of dark mottles and grains observed in high spatial and...
We study periodicities of dark mottles and grains observed in high spatial and temporal resolution $...
On the nature of the chromospheric fine structure II. Intensity and velocity oscillations of dark mo...
In this work, we study the periodicities of oscillations in dark fine structures using observations ...
A number of recent investigations have revealed that transverse waves are ubiquitous in the solar ch...
Context. In the past, chromospheric features were mostly studied by analyzing observations performed...
A number of recent investigations have revealed that transverse waves are ubiquitous in the solar ch...
Context.Ca bright grains are small and repetitive brightenings ubiquitously found in the quiet Sun.A...
We characterize waves in small magnetic elements and investigate their propagation in the lower sola...
In April 2002, H_alpha observations of the solar chromosphere with high spatial and spectral resolut...
High-resolution ${\rm H\alpha}$ observations of a solar region containing several mottles are analyz...
Aims. By analyzing TRACE (Transition Region and Coronal Explorer) data, we investigate intensity osc...
Aims. The main goal of this work is to analyze the structural and temporal evolution of small-scale ...
We report observations of small-scale swirls seen in the solar chromosphere. They are typically 2 Mm...
A 45 min time series of two-dimensional spectra has been obtained with the Vacuum Tower Telescope a...