We present deep images on the Hα emission plus an adjacent continuum obtained with OSIRIS/GTC, using the TF red in scanning mode for the Seyfert 2 galaxy Mrk 938. We detect HII regions so far (35 kpc) and two filaments with diffuse emission in the Hα pure images. We obtain Hα fluxes and we estimate velocities for these regions.

Cygnus OB2 is a rich and relatively close (d~1.4 kpc) OB association in our Galaxy. It represents an ideal testbed for our theories about self-enrichment processes produced by pollution of the interstellar medium by successive generations of massive stars. Comerón & Pasquali (2012, A&A, 543, A101) found a correlation between the age of young

We present new constraints on the ratio of black hole (BH) mass to total galaxy stellar mass at 0.3 z 0.9 for a sample of 32 type-1 active galactic nuclei (AGNs) from the XMM-COSMOS survey covering the range M BH ~ 107.2 - 8.7 M sun. Virial M BH estimates based on Hβ are available from the COSMOS Magellan/IMACS survey. We use high-resolution

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