Context: . The morphology of massive star formation in the central regions of galaxies is an important tracer of the dynamical processes that govern the evolution of disk, bulge, and nuclear activity. Aims. We present optical imaging of the central regions of a sample of 73 spiral galaxies in the Hα line and in optical broad bands, and derive

We present the stellar and gas kinematics of a sample of 18 nearby late-type spiral galaxies (Hubble types ranging from Sb to Sd), observed with the integral-field spectrograph SAURON at the 4.2-m William Herschel Telescope. SAURON covers the spectral range 4800-5380Å, allowing us to measure the Hβ, Fe, Mgb absorption features and the emission in

The physical nature of the currently observed dark energy in the universe is completely unclear, and many different theoretical models co-exist. Nevertheless, if dark energy is produced by vacuum fluctuations then there is a chance to probe some of its properties by simple laboratory tests based on Josephson junctions. These electronic devices can

The table contains the R.A., Dec., optical and near-IR photometry of candidate members studied in the paper. Optical broad-band photometry is taken with the CFHT 12k camera in the Mould I band and CFHT z band (for effective transmission profile of the z band see e.g. Moraux et al., 2003, Cat. ). Near-IR photometry 2MASS () JHK is listed when a

A sample of 16 blue compact dwarf galaxies (BCDs) in the Virgo Cluster has been imaged in the near-infrared (NIR) in J and Ks on the 2.1 m telescope at the Observatorio Astronómico Nacional in the Sierra San Pedro Mártir in Mexico. Isophotes as faint as μJ=24 mag arcsec-2 and μKs=23 mag arcsec-2 have been reached in most of the targets. Surface

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