A Tale of Two Regions: Site Protection Experience and Updated Regulations in Arizona and the Canary Islands
Some of the world's largest telescopes and largest concentrations of telescopes are on sites in Arizona and the Canary Islands. Active site protection efforts...
A tale of two stellar characterisation codes: StePar and SteParSyn
We report on two state-of-the-art codes designed to characterise the spectra of late-type stars. STEPAR is a Python 3.X code that implements the EW method to...
A Technique for Separating the Gravitational Torques of Bars and Spirals in Disk Galaxies
Near-infrared images are useful for analyzing the stellar backbone of disk galaxies, and in particular can be used to derive gravitational potentials (Quillen...
A Test of Newton's Law of Gravity in the Weak Acceleration Regime
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...
We describe a scenario for the topology of the magnetic field in penumbrae that accounts for recent observations showing upflows, downflows, and reverse...
A trimodality in the distribution of star formation in galactic bars
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...