Résumé / Abstract Seminaire_IAP
« The Galactic Center: from the supermassive black hole to the minispiral »

Jim Moran
Harvard-Smithsonian Center Astroph. (CfA) (Cambridge, Massachusetts, Etats-Unis d'Amérique)

I will discuss the radio observations of the innermost parsec of the galaxy, which contains the 4 x 10^6 solarmass blackhole at the position of the radio source Sgr A*. With the Submillimeter Array (SMA) we have determined the velocity field of the socalled mini-spiral distribution of ionized gas, which may be involved in the inflow of material onto the black hole. We have also used the SMA to estimate the accretion rate onto the black hole from the Faraday rotation of the radio emission. I will discuss recent VLBI observations of SgrA* at 230 GHz, which suggest that it has an intrinsic angular size of about four Schwarzschild radii. Finally, I will discuss plans to build a VLBI Network of sufficient size to image SgrA*.
vendredi 8 octobre 2010 - 11:00
Amphithéâtre Henri Mineur, Institut d'Astrophysique de Paris
Page web du séminaire / Seminar's webpage