Chromospheric resonant cavities in umbrae: unequivocal detection and seismic applications
Umbral chromospheric oscillations exhibit significant differences compared to their photospheric counterparts. We evaluate two competing scenarios proposed for...
Chromospheric variability in late-type dwarfs from high-resolution spectra of CA II H
An analysis is presented of high-resolution high SNR spectra of late-type chromospherically active dwarfs in Ca II H. Observational parameters employed are the...
Chromospheric Velocity Fields Diagnostics from CAII and MGII Emission Profiles
The authors discuss the present limits to the velocity field diagnostics in stellar chromospheres achievable with ESO CAT+CES and IUE high resolution spectra.
ChronoGal: Unveiling the secrets of our Galaxy through stellar ages from Gaia Colour-Magnitude Diagrams
The derivation of precise stellar ages is considered the current major challenge to reconstruct the chronological chain of events that shaped the Milky Way (MW)...
CI Cam: Observations of the Dust Envelope Diameter
We spatially resolved the symbiotic star CI Cam, about 6 months after its April 1998 outburst, using the IOTA stellar interferometer. We measured the diameter...
CI non LTE spectral line formation in late-type stars
We present non-Local Thermodynamic Equilibrium (non-LTE) calculations for neutral carbon spectral line formation, carried out for a grid of model atmospheres...
Ci Non-LTE Spectral Line Formation in Late-Type Stars
We present the results from our non-LTE investigation for neutral carbon, which was carried out to remove potential systematic errors in stellar abundance...