A pilot experiment suitable to test Newton's law of gravity down to the regime of acceleration typical of galaxies has been carried out in Omega Centauri. Stars...

Not Available

We describe a scenario for the topology of the magnetic field in penumbrae that accounts for recent observations showing upflows, downflows, and reverse...

We report a trimodal behaviour of the spatial distribution of ionised gas within bars in the S 4G survey, in which star-forming bars are most common among late...

The form and universality of the mass function of young and nearby star-forming regions is still under debate. Its relation to the stellar density, its mass...

The physical interpretation of spectropolarimetric observations of lines of neutral helium, such as those of the 10830 Å multiplet, represents an excellent...

We report atmospheric parameter estimates (Teff, log g, [Fe/H]) and other information (radial velocities, proper motions, distance estimates) for roughly 40,000...

Not Available

Massive galaxies at z>2 were a factor of 4 smaller than their present-day local counterparts. In the nearby universe (z