Aims:The aim of this paper is to analyze the thermal properties, oscillatory, and flow motions of a bright, long-lasting feature observed in solar granulation, which we call the plume. Methods: We used the spectral observations of quiet granulation at solar disc center, including the two Fe II 5234 and Fe I 6393 Å lines recorded simultaneously at

We report the discovery of gas streaming motions along nuclear spiral arms toward the LINER nucleus of the galaxy NGC 6951. The observations, obtained using the GMOS integral field spectrograph on the Gemini North telescope, yielded maps of the flux distributions and gas kinematics in the Hα, [N II] λ6584, and [S II] λλ6717, 6731 emission lines of

As part of our ongoing Chandra/HST M31 transient program we report on two active sources recently detected in two Chandra ACIS observations. Source 1 We present two 5ks ACIS-I observations of the ongoing outburst of the M31 transient source CXOM31 J004217.0+411508 (r3-46). Using an absorbed powerlaw model with photon index = 1.7 and nH = 6.6e20

We summarise the current status of our project to identify and study z ˜ 6-10 galaxies thanks to strong gravitational lensing. Building on the detailed work from tet{sch:richard06}, we present results from new follow-up observations (imaging) undertaken with ACS/HST and the Spitzer Space Telescope and compare our results with findings from the

We present new tools for improving our abilities for disentangling relevant stellar population parameters in early-type galaxies. To develop these tools we use stellar population synthesis models predicting spectra for old and intermediate-aged stellar populations at moderately high resolution. We propose new indices to lift the age/metallicity

The HST/ACS Survey of Galactic Globular Clusters includes F606W and F814W observations of 66 clusters (Sarajedini et al. 2007). We present new global mass functions (MFs) for a significant sub-sample of clusters in the survey. We also present updated core radii, tidal radii, and concentrations for many of these clusters. This new information allows