Ionization of the diffuse gas in galaxies: hot low-mass evolved stars at work
We revisit the question of the ionization of the diffuse medium in late type galaxies, by studying NGC 891, the prototype of edge-on spiral galaxies. The most...
Is Dark Matter the most valid explanation for the mass which is apparently missing in the Universe?
Two main families of models explain that, at least in appearance, something like 90% of the mass of the Universe is still undetected. One (supported by an...
Is star formation a stochastic or a regulated process?
The stellar initial mass function (IMF) is usually assumed to be a probability density distribution function. Recent data appear to question this interpretation...
In comparison with Solar twins in the Solar neighborhood the Sun has been found to be somewhat poor in refractory elements relative to volatiles. Why is that...
It's About Time: Exploring Planet Evolution with the Zodiacal Exoplanets In Time (ZEIT) Project
Time is one of the least explored dimensions of exoplanet research; most stars targeted by large surveys are middle-aged by necessity or statistics. Yet the...
J-PAS and J-PLUS: Large Sky Multi-filter Surveys from the Javalambre Observatory
The Observatorio Astrofísico de Javalambre (hereafter OAJ) is a new Spanish astronomical facility devoted to carry out large sky multi-filter surveys with two...
Jorge Juan: sus Observaciones Astronómicas y físicas
Jorge Juan y Santacilia (Novelda, 1713; Madrid, 1773) participó en la expedición científica organizada por la Academia de Ciencias de París al Ecuador...