We present the preliminary results of a detailed study of ground-based photometric and spectroscopic observations dedicated to the β Cephei CoRoT main target HD~180642. Besides the non-linear dominant radial mode several low-amplitude modes are detected in both kinds of datasets. Our aim is to derive the wavenumbers (ℓ,m) of these modes, as

Ground-based observations are a strong tool for asteroseismic studies and even in the era of asteroseismic space missions they continue to play an important role. I will report on the activities of the CoRoT/SWG Ground-Based Observations Working Group, discuss the observational efforts of the Open Cluster campaigns and the search for the origin of

Aims: To explore the impact of surface inhomogeneities on stellar spectra, granulation models need to be computed. Ideally, the most fundamental characteristics of these models should be carefully tested before applying them to the study of more practical matters, such as the derivation of photospheric abundances. Our goal is to analyze the

Galactic black hole transient H1743-322 has been in outburst since UT 2009 May 26, (ATELs #2058, #2062). The RXTE PCA count rate has been dropping since 2009 June 23. We have analyzed the PCA data taken between 2009 June 26 and July 7. Quick fits to all sets with a power law + diskbb + smedge model were performed. While the flux was decreasing

Los Núcleos Galácticos Activos (AGN por sus siglas en inglés) han jugado seguramente un papel más importante del inicialmente pensado en el universo temprano y en su posterior evolución. De hecho, la visión que tienen los astrónomos del fenómeno AGN ha cambiado significativamente en los últimos 15 años. Los AGN ya no son únicamente fuentes con

Los últimos años han visto un avance importante en el estudio de los bulbos de las galaxias de disco. Éstos, que hasta los años 80 se creían objetos parecidos a galaxias elípticas en el centro de galaxias espirales, aparecen hoy como elementos controvertidos, con diversidad de estructuras, dinámicas y poblaciones estelares, que hacen pensar en más