[SEMINARI] Dinnertime for SgrA* (The Black Hole in the Center of
OUR Galaxy)
Jon Marcaide
J.M.Marcaide en uv.es
Mie Sep 26 14:37:47 CEST 2012
Hola a todos,
Solo añadir que Jim Moran ha sido Chairman, Dept. of Astronomy de Harvard Univ de 2005-2011 y es
desde 2001 "Donald H. Menzel" Professor of Astrophysics en Harvard.
Es un gran radioastronomo y un speaker claro y sosegado. Será un placer escucharle.
Saludos a todos y hasta el martes.
-Jon
On Sep 26, 2012, at 11:37 AM, Enric Marco wrote:
> Title: Dinnertime for SgrA* (The Black Hole in the Center of OUR Galaxy)
>
> By: James Moran
>
> From: Harvard-Smithsonian Center for Astrophysics
>
> Where: Saló de Graus de Facultat de Matemàtiques
>
> Date: Dimarts 02 octubre 2012
>
> Time: 15:00
>
> Resum
>
> I will describe the developing efforts to image the environs of the
> black hole in the center of our galaxy at 230 GHz and higher with Very
> Long Baseline Interferometry (VLBI). The VLBI Array is called the
> Event Horizon Telescope (EHT). At 230 GHz the interstellar scattering
> and the source optical depth are sufficiently small that the immediate
> vicinity of the black hole can be discerned. The size of this image
> has a diameter of about 37 microarcseconds or about 4 Schwarzschild
> radii. Image quality should improve rapidly in the coming years as the
> EHT is formed and may provide new insight about general relativity in
> the strong gravity limit. We are at a phase of development similar to
> that of imaging Cygnus A in the early 1950s. Plans are under way to
> image SgrA* next spring when the newly discovered orbiting earth-sized
> mass, now known as "G2", will be tidally disrupted as it passes
> perihelion and may cause electromagnetic flaring activity.
> I will also describe the imaging of the innermost parts of the jets
> driven by the black holes in M87 and another AGN, 1924-293.
>
> --
> ---
>
> /------------------------------------\
> Dr. Enric Marco
> Departament d'Astronomia i Astrofísica
> Facultat de Física
> Universitat de València
> C/ Dr. Moliner, 50
> 46100 Burjassot, Spain
> Phone: (34)-96-354-3069
> Fax:(34)-96-354-3084
> enric.marco en uv.es
> www.uv.es/marco
> \--------------------------------------/
>
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