The ionized intergalactic gas: baryonic dark matter.
We use Hα measurements of complete sets of HII regions in disc galaxies to compute the fraction of ionizing photons which escape from them using the hypothesis...
We determine the Fe abundances for several blue compact and emission-line galaxies. The O/Fe abundance ratios are found to increase with the metallicity of the...
The iron and oxygen abundances in the metal-poor star HD 140283 and in the Sun
We present the results of a theoretical investigation of the impact of NLTE effects and of granulation inhomogeneities on the iron and oxygen abundances in the...
The irregular limb of Manoetius South Pole and Improved Orbital Solution (extended analysis)
In 2033, after a 12-year trip across the Solar System, NASA's Lucy mission will arrive at the Patroclus─Menoetius binary system, in Jupiter's L5 cloud. On its...
The IRS Spitzer Spectra of the Magellanic Cloud Planetary Nebulae: Revealing the Dust and Gas Chemistry
Planetary nebulae (PNe) in the Magellanic Clouds (LMC, SMC) offer a unique opportunity to study both the population and evolution of low- and intermediate-mass...