The extreme enhancement in CNO of the iron-poor dwarf star J0815+4729
Low-mass extremely metal-poor (EMP) stars formed from a mixture of material of the primordial nucleosynthesis and matter ejected from the first supernovae. The...
The extreme relic galaxy NGC 1277 is dark matter deficient
Relic galaxies are extremely compact early-type objects that have failed to accrete an extended envelope of stars. We observed the relic galaxy NGC 1277 with...
We discuss the first results of the Fermi-GBM all-sky search for X-ray bursts. The very large field of view and X-ray response of the Fermi-GBM make it a unique...
The FIP effect on late-type stellar coronae: from dwarfs to giants
We present an analysis of high resolution Chandra spectra of late-type stars. Our sample includes giant stars from the Hetzsprung gap to the ''clump'' phase...
The First Billion Years simulation project. Galactic outflows and metal enrichment
The First Billion Years is one of the largest and most comprehensive cosmological, hydrodynamical simulation of the early Universe to date. It studies the...
The first evidence of enhanced recombination in planetary nebulae and the implications on photo-ionized plasmas
There are two main types of photoionized gaseous nebulae that exist in the universe: H II regions and Planetary Nebulae (PNe). They mark the endpoints of...