Investigaciones llevadas a cabo en los últimos 25 años sugieren que la vasta estructura que se observa en el Universo proviene de pequeñísimas fluctuaciones generadas en los primeros instantes del Universo. Gracias al enorme progreso que se ha realizado en los últimos tiempos, se ha podido establecer con gran precisión el valor de los parámetros

Because of an error in transferring proof corrections, two instances of νl have been incorrectly set as νlow. 1. In § 5.2, paragraph 4 (bottom of p. 602), the second sentence should read (corrected passage underlined): ``Shifts in these frequency-frequency correlations were found in two AMPs by van Straaten et al. (2005) and Linares et al. (2005)

Context: On the nature, redshift, stellar populations and dust properties of optically faint or non-detected extremely red objects. Aims: Determining the nature, redshift, stellar populations and dust properties of optically faint or non-detected, extremely red objects (ERO) found from our survey of the lensing clusters A1835 and AC114 (Richard et

We analyze a 96 ks Chandra HETGS observation of the single G-type giant HR 9024. The high flux allows us to examine spectral line and continuum diagnostics at high temporal resolution, to derive plasma parameters. A time-dependent one-dimensional hydrodynamic model of a loop with half-length L=5×1011 cm (~R*/2) and cross-sectional radius r=4.3×1010

Transit searches provide a large number of planet candidates. Before attempting follow-up observations, the best effort should be spent in classifying the light-curves, rejecting false alarms and selecting the most likely ones for real planets. A number of analysis tools has been developed with these objectives. Here, we apply such tools to 237

Context: The behaviour of both ephemeral regions and moving magnetic features has been often described for the photospheric layer, but not for the chromosphere. Both magnetic structures are related to the decay of active regions, but their actual role is not yet clear. Aims: Our aim is to observe and understand the behaviour of these structures in