Ices and X-rays to explain chemical abundances in protoplanetary disks. The study: “X-ray processing of a realistic ice mantle can explain the gas abundances in protoplanetary disks” of A. Ciaravella (INAF-OAPA) recently appeared on PNAS

To understand how planets form, it is mandatory to study the evolution of protoplanetary disks, e.g. disks of gas and dust grains orbiting around stars during the first 3-5 million years of their evolution, a that may evolve into planetary systems. In the last years, several observations have been done in order to detect the molecules, mainly organic, in these

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Atmosphere and habitability in terrestrial planets. The study: “A systematic study of CO2 planetary atmospheres and their link to the stellar environment” of A. Petralia (INAF-OAPA) recently appeared on MNRAS

Terrestrial planets are common in the Milky Way. It has been estimated, in fact, that at least 30% of stars in the Solar neighborhood host a terrestrial planet, and this fraction increases to 40% considering the habitable zone around all M stars (e.g. stars with effective temperature between 2400 and 3700 degrees) of the Galaxy. The habitable zone is defined

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Hunting exocomets. The study: “Exocomets: A spectroscopic survey” of I. Rebollido (Universidad Autónoma de Madrid) recently appeared on Astronomy & Astrophysics

The Solar System is populated by a variety of objects: gaseous giants, rocky planets, dwarf planets, moons, asteroids, comets, and dust. To date, more than 4000 planets orbiting around other stars were identified, and the presence of planets seems to be ubiquitous in stars of our Galaxy. Are the other class of objects that we observe in the Solar System

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A new diagnostic tool to identify metal-rich ejects in supernova remnants. The study: “Unveiling pure-metal ejecta X-ray emission in supernova remnants through their radiative recombination continuum” of E. Greco (UNIPA/INAF-OAPA/API) recently appeared on A&A

Supernova remnants are nebulae created by supernova explosions. These expanding clouds are formed by the interstellar medium shocked and heated up by the expanding shock produced by the explosion, and the knots of material launched by the exploding star, called ejecta. These ejecta are located behind the expanding shock, traveling with lower velocity, and they are heated up by the reverse shock:

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MHD simulations of the radio emission from a flaring T Tauri star. The study: “Predicting the time variation of radio emission from MHD simulations of a flaring T-Tauri star” of Waterfall C. O. G. (Jodrell Bank Centre for Astrophysics) recently appeared on MNRAS

T Tauri stars are young low-mass stars (typically younger than 5 million of years), which are surrounded by a protoplanetary disk, e.g. a disk of gas and dust orbiting around the star. The disk material does not reach the central star: the dust component sublimates in the inner disk, where the temperature exceeds 1500 degrees, while the gas disk is truncated

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How to correct from systematics high-precision photometric data. The study: “Principal component analysis to correct data systematics. Case study: K2 light curves” of A. Petralia (INAF-OAPA) recently appeared on Experimental Astronomy

Several fields in modern astronomy rely on high-precision photometric data. This is true, in particular, for the search of exoplanets with the method of transits. This method consists in searching very small periodic dimming of stellar emission due to the transit of planets along the line of sight during their orbits. For instance, the transit due to a Hot Jupiter (a gaseous

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Hot Jupiters around young stars. The study: “The GAPS Programme at TNG. XXI. A GIARPS case study of known young planetary candidates: confirmation of HD 285507 b and refutation of AD Leonis b” of I. Carleo (Van Vleck Observatory/INAF-OA Padova) recently appeared on A&A

The discovery of the first exoplanet in 1995 was a challenge to our knowledge of the architecture of planetary systems. The planet orbiting around the star 51 Peg, in fact, was different than the planets in our Solar System: it was a gaseous giant orbiting at only 0.05 Astronomical Units (A.U., where 1 A.U. is the average distance between Earth

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First light for the EWOCS (Extensive Westerlund One Chandra Survey) project

On June 2019, the panel for the evaluation of the proposals for observations with the NASA telescope Chandra, operating in the X-rays, which met up in Boston, has approved the Large Project: “Star formation in starburst: a deep ACIS-I observation of Westerlund 1“, led by the astronomer Mario Giuseppe Guarcello – INAF Astronomical Observatory of Palermo. More details on the

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