Tag: rotazione stellare

Chemistry and rotation of the B stars in the stellar cluster NGC3293. The study: “The Gaia-ESO survey: A spectroscopic study of the young open cluster NGC 3293” of T. Morel (Université de Liège) appeared on A&A

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Spectroscopic observations of massive stars (i.e., those more massive than 8 solar masses) allow astronomers to study their rapid evolution, which occurs on much shorter timescales compared to solar mass stars, and the impact of parameters such as stellar rotation on their evolution. To achieve this, observations of stellar clusters are greatly valuable, as they are groups of stars formed

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Infrared variability in pre-Main Sequence stars. The study: “Near-infrared time-series photometry in the field of Cygnus OB2 association II. Mapping the variability of candidate members” of J. Roquette (University of Exeter/ ICEx – UFMG) recently appeared on A&A

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Pre-Main Sequence stars are young stars whose nuclei are still not hot enough to trigger the thermonuclear reactions that will produce energy for the rest of their existence. Some of these stars are called “T Tauri”, and they are surrounded by a protoplanetary disk made of gas and dust, where planetary systems may form. T Tauri stars were classified for

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Pubblicato su A&A “CSI 2264: Investigating rotation and its connection with disk accretion in the young open cluster NGC 2264” di L. Venuti

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La velocità di rotazione delle stelle è legata alla loro età, diminuendo man mano che le stelle invecchiano. Le giovani stelle di pre-sequenza principale (con pochi milioni di anni di vita) sono però caratterizzate da velocità di rotazione più basse di quelle attese. Questo potrebbe essere dovuto a qualche fenomeno che caratterizza le stelle di pre-sequenza, che regola le prime

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