Le 27 septembre 2013
De 10h30 à 11h30
Amphithéâtre – Grande Coupole
George YOUNES
USRA – Huntsville (USA)
Magnetars are thought to be isolated neutron stars powered by the most intense magnetic fields known in the universe (B~10^14-10^16 G). These rare objects, with a total of 26 candidates, are characterized by repeated and sometimes spectacular bursts. The most common bursts are usually short, lasting for tens to hundreds of ms, soft, with most of the emission between 1-100 keV, and with luminosities ranging from 10 to 1000 Eddington. In this talk, I will review the most recent results of the FERMI/gamma-ray burst monitor (GBM) magnetar group. I will focus on the bursts spectral and timing properties of these sources, and discuss them in the framework of the magnetar model. I will conclude with a summary of the known and unknown facts about magnetars and give some suggestions for future research.