Home   >   Research   >   Seminars and meetings   >   Internal seminars : The evolution of cool dwarf spin rates: Data, models, and tensions

The evolution of cool dwarf spin rates: Data, models, and tensions

October 5, 2018
From 10:30 until 12:00

Marcel Agüeros



Stellar ages are notoriously difficult to measure accurately for main-sequence low-mass stars, severely limiting our ability to address questions ranging from the evolutionary state of exoplanets to the chemical history of the Galaxy. Gyrochronology, which uses stellar rotation as a proxy for age, is a promising solution to this quandary. Unfortunately, however, theoretical calibrations of the age-rotation relation have historically been hampered by the lack of rotational measurements for large numbers of low-mass stars with a wide range of well-known ages. We are still far from being able to describe fully the evolution of rotation for low-mass stars, or from being able to use rotation measurements to estimate accurately the ages of isolated field stars. I will first summarize recent ground based and space-based work to characterize the rotational behavior of G, K, and M dwarfs in open clusters ranging in age from 125 Myr (the Pleiades) to 3 Gyr (Ruprecht 147), and then compare these data to each other and to models for stellar spin-down in order to appraise our current understanding of the age-rotation relation.

Search & Find
Dec 3 2020

Gaia is an ambitious ESA mission to chart a three-dimensional map of our Galaxy with unprecedented...

May 13 2020

The ObAS seminars have moved online, every Friday morning at 10:30 here The program of the coming...

Dec 15 2020

Comme la plupart des galaxies spirales, la Voie lactée a en son centre une condensation d'étoiles à...

Oct 9 2020

Le Globe de Coronelli de Strasbourg restauré sera inauguré officiellement (sur invitation) ce...

Sep 19 2020

En raison de la situation sanitaire, il n'y aura pas de visites de la Grande Coupole de...

Jul 28 2020

CDS is hiring a researcher (M/F) on a 24 months contract for the scientific support to the...