Contribution of the disk emission to the broad emission lines in AGNs: Two-component model
We present an investigation of the structure of the emission line region in a sample of 12 single-peaked Active Galactic Nuclei (AGNs). Using the high...
Convection in the atmospheres and envelopes of turnoff and giant branch stars of globular clusters
We explore the dependence of {T_eff}'s and colors of stellar models on the treatment of over-adiabatic convection, both in the atmosphere and in the interior...
Convective core sizes in rotating massive stars. I. Constraints from solar metallicity OB field stars
Context. Spectroscopic studies of Galactic O and B stars show that many stars with masses above 8 M ⊙ have been observed in the Hertzsprung-Russell (HR) diagram...
Convective line shifts for the Gaia RVS from the CIFIST 3D model atmosphere grid
Context. To derive space velocities of stars along the line of sight from wavelength shifts in stellar spectra requires accounting for a number of second-order...
Convective Wavelength Shifts in the Spectra of Late-Type Stars
We present ultrahigh-resolution spectra for a set of nearby F-G-K stars on, or close to, the main sequence. The wavelength shifts of stellar lines relative to...
Convectively Driven Sinks and Magnetic Fields in the Quiet-Sun
We study the relation between mesogranular flows, convectively driven sinks and magnetic fields using high spatial resolution spectropolarimetric data acquired...
Doppler velocities in the penumbra of a δ-configuration sunspot observed near the limb indicate flows that converge upon the line separating locally positive...