Category: Ricerca

Stellar ages and lithium abundances. The study: “The Gaia-ESO Survey: empirical estimates of stellar ages from lithium equivalent widths (EAGLES)” of R. D. Jeffries (Keele University) appeared on MNRAS

Ricerca

Estimating stellar ages can prove to be a challenging task. The methods typically employed for estimating stellar ages rely on our understanding of how fundamental stellar properties that can be observed change as stars age. This often results in measurements that lack precision, particularly for stars in the main sequence, which is a stable evolutionary phase during which stellar properties

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Morphology and environment of the radiogalaxies. The study: “Investigating the large-scale environment of wide-angle tailed radio galaxies in the local Universe” of V. Missaglia (UniTo, OATo) appeared on A&A

Ricerca

Radiogalaxies are galaxies characterized by intense emission of radio waves, primarily produced by relativistic particles in motion along magnetic field lines (known as synchrotron emission). This radio emission is the result of the activity of a supermassive black hole situated at the center of these galaxies, giving rise to a plasma jet that extends over thousands or even millions of

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A planet and a brown dwarf for TOI-179. The paper: “TOI-179: A young system with a transiting compact Neptune-mass planet and a low-mass companion in outer orbit” of S. Desidera (INAF – OAPd) appeared on A&A

Ricerca

Typically, planets did not form at the distance from their central stars where we observe them today. In fact, during their early evolution, planets migrate from their initial orbit until the system reaches its final configuration. Planetary migration can be induced by several processes: the interaction between the newborn planets and the protoplanetary disk where they formed, the gravitational interaction

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Two cycles, two programs. The astronomers of the INAF – OAPA will study the star formation in extreme environments wth JWST

Ricerca

The formation of stars and planets results from the complex interplay of various factors and agents: the collapse of the cloud due to its own gravitational force, its internal turbulence and magnetic effects, the evolution of star clusters formed within, and the interactions among young stars within these clusters, as well as the influence of their radiation on the surrounding

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A binary system in orbital synchronization. The study: “The GAPS programme at TNG. XLIII. A massive brown dwarf orbiting the active M dwarf TOI-5375” of J. Maldonado (INAF – OAPA) appeared on A&A

Ricerca

Nature sets a lower limit on stellar masses: objects less massive than 0.07-0.08 solar masses are incapable of initiating the thermonuclear reactions that power more massive stars. Below this threshold lies the realm of brown dwarfs, objects whose mass is too small to qualify as stars, yet too large to be categorized as planets.   The mechanism responsible for the

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100 newly discovered Near Earth Objects classified by the Gal Hassin

Ricerca

Meteoritic impacts have shaped various aspects of Earth and its ecosystem. However, we should not consider impacts as a risk solely confined to our past. In particular, Near Earth Objects (NEOs) constitute a family of asteroids and comets that require continuous monitoring.   Technically, a NEO is defined as an object orbiting the Sun at a distance ranging from 0.98

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Predictions on the observability of the neutron star in SN1987A. The study: “Investigating the Time Evolution of the Thermal Emission from the Putative Neutron Star in SN 1987A for 50+ Years” of A. Dohi (Kyushu University) appeared on ApJ

Ricerca

SN1987A, located in the Large Magellanic Cloud, is an object of great importance for the study of supernovae and supernova remnants. In fact, it is the only supernova that has occurred recently and is close enough to allow us to obtain detailed observations across the entire electromagnetic spectrum. SN1987A was a core-collapse supernova, resulting from the collapse of the core

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Two planets for the young star HD 63433. The study: “The GAPS Programme at TNG XLII. A characterisation study of the multi-planet system around the 400 Myr-old star HD 63433 (TOI-1726)” of M. Damasso (INAF – OATo) appeared on A&A

Ricerca

The search and characterization of exoplanets around young stars (where “young” here means less than 600 million years) is crucial for advancing our understanding of planetary formation processes and the early stages of planet evolution. During this phase, the planetary environment is significantly more turbulent compared to that of mature exoplanetary systems. For example, many planets in young systems continue

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Two terrestrial planets discovered in the habitable zone of the star GJ1002. The study: “Two temperate Earth-mass planets orbiting the nearby star GJ1002” of A. Suárez Mascareño (Istituto de Astrofisica de Canarias) appeaed on A&A

Ricerca

The search for terrestrial like exoplanets in the habitable zone of their stars is one of the most significant areas of exoplanetary science. The habitable zone is defined as the region around a given star where rocky planets are within the suitable temperature range to potentially support liquid water on their surfaces. Earth-like planets within habitable zones are therefore the

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Stellar lithium abundances may not be representative of the interstellar medium composition. The study: “The Gaia-ESO Survey: Probing the lithium abundances in old metal-rich dwarf stars in the solar vicinity” of M. L. L. Dantas (Nicolaus Copernicus Astronomical Center) appeared on A&A

Ricerca

The study of chemical abundances in the interstellar medium and stars in our Galaxy is of utmost importance, as it provides insights into the chemical enrichment of the galactic interstellar medium by massive stars and the evolution of different components of the Milky Way. Lithium is frequently the subject of spectroscopic surveys and studies aimed at determining its abundance in

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