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X-WR-CALDESC:Eventi per Osservatorio Astronomico di Roma
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DTSTART;TZID=Europe/Rome:20180116T114500
DTEND;TZID=Europe/Rome:20180116T124500
DTSTAMP:20260406T060818
CREATED:20170917T091053Z
LAST-MODIFIED:20170917T091053Z
UID:3513-1516103100-1516106700@www.oa-roma.inaf.it
SUMMARY:Rossby number calculations for fully convective stars
DESCRIPTION:The Rossby number is a quantity that gauges the relative importance of\nrotation in astrophysical flows. In particular\, it plays a significant role\nin mean-field\, alpha-Omega dynamo models as it is directly related to the\n“dynamo number” which\, in turn\, measures the efficiency of the magnetic field\ngeneration. From an observational standpoint\, the Rossby number has been\nwidely used to correlate either coronal or chromospheric magnetic activity of\nlow-mass stars with their rotation. A fundamental problem with this\nrotation-activity relationship is the determination of the convective turnover\ntime tau_c\, on which the Rossby number depends\, and that can be obtained\nfrom some empirical relations or from stellar models. The ATON stellar\nevolution code has been used in the near past to calculate Rossby numbers\nfor solar-type stars and now\, in view of the recent discovery of fully\nconvective stars in the non-saturated region of the rotation-activity\nrelationship\, is being used to extend those calculations to very low mass\nstars.
URL:https://www.oa-roma.inaf.it/event/seminar-by-louiz-temistoklis-mendes/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20180116T114500
DTEND;TZID=Europe/Rome:20180116T124500
DTSTAMP:20260406T060818
CREATED:20170917T091053Z
LAST-MODIFIED:20170917T091053Z
UID:4730-1516103100-1516106700@www.oa-roma.inaf.it
SUMMARY:Rossby number calculations for fully convective stars
DESCRIPTION:The Rossby number is a quantity that gauges the relative importance of\nrotation in astrophysical flows. In particular\, it plays a significant role\nin mean-field\, alpha-Omega dynamo models as it is directly related to the\n“dynamo number” which\, in turn\, measures the efficiency of the magnetic field\ngeneration. From an observational standpoint\, the Rossby number has been\nwidely used to correlate either coronal or chromospheric magnetic activity of\nlow-mass stars with their rotation. A fundamental problem with this\nrotation-activity relationship is the determination of the convective turnover\ntime tau_c\, on which the Rossby number depends\, and that can be obtained\nfrom some empirical relations or from stellar models. The ATON stellar\nevolution code has been used in the near past to calculate Rossby numbers\nfor solar-type stars and now\, in view of the recent discovery of fully\nconvective stars in the non-saturated region of the rotation-activity\nrelationship\, is being used to extend those calculations to very low mass\nstars.
URL:https://www.oa-roma.inaf.it/event/seminar-by-louiz-temistoklis-mendes-2/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
END:VCALENDAR