Tag: B stars

From the Gaia-ESO Survey, the analysis of the rotational velocity of the B stars in 8 stellar clusters of the Carena Complex presented in “The Gaia-ESO Survey: projected rotational velocities of B stars in the Carina Nebula” of W Santos (Observatorio Nacional MCTI, Brazil)

Ricerca

Rotation velocities measured for 330 B-type stars in eight stellar clusters of the Carina complex, thanks to the Gaia-ESO Survey.   Stars rotate on their axes. Some, such as young stars, spin very rapidly, with rotation periods as short as one or two days. In other cases, like red giant stars, rotation is much slower, with periods lasting several months.

» Read more
, , , , , , ,

INAF-OAPA researchers observe for the first time X-ray emission from an active region in a B star

Slider

The study of the X-ray emission from stars provides an unmatched view of those energetic phenomena occurring in stars. In massive stars (O and early B stars), soft X-ray photons (less energetic than about 1 keV) are emitted from shocks in stellar winds. More energetic photons (the hard X-ray emission) is due to colliding stellar winds in binary systems or

» Read more
, , , , , , ,

Pubblicato lo studio: “The early B-type star Rho Oph A is an X-ray lighthouse” di I. Pillitteri

Ricerca

di Mario Giuseppe Guarcello    ( segui mguarce)     Le stelle possono essere enormi magneti. In particolare, stelle come il Sole riescono a produrre un intenso campo magnetico nella regione di separazione tra la regione radiativa, piu’ in profondita’, e quella convettiva, piu’ superficiale, chiamata “tachocline”. Il campo magnetico prodotto da una stella e’ necessario per la formazione della corona,

» Read more
, ,