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26 April 2024

» arxiv » astro-ph/0411487

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Towards the Event Horizon - The Vicinity of AGN at Micro-Arcsecond Resolution
T.P. Krichbaum ; D.A. Graham ; W. Alef ; A. Kraus ; B.W. Sohn ; U. Bach ; A. Polatidis ; A. Witzel ; J.A. Zensus ; M. Bremer ; A. Greve ; M. Grewing ; S. Doeleman ; R.B. Phillips ; A.E.E. Rogers ; H. Fagg ; P. Strittmatter ; L. Ziurys ; J. Conway ; R. S. Booth ; S. Urpo ;
Date:	17 Nov 2004
Subject:	astro-ph
Abstract:	We summarize the present status of VLBI experiments at 3 mm (86 GHz), 2 mm (129-150 GHz) and 1.3 mm (215-230 GHz). We present and discuss a new 3 mm VLBI map of M87 (Virgo A), which has a spatial resolution of only approx. 20 Schwarzschild radii. We discuss recent VLBI results for SgrA* and argue in favor of new observations within an extended European mm-VLBI network, in order to search for variability. We discuss the possibilities to image the `event horizon’ of a super-massive black hole at wavelengths < 2mm, and conclude that the addition of large and sensitive millimetre telescopes such as CARMA, the SMA, the LMT and ALMA will be crucial for this.
Source:	arXiv, astro-ph/0411487
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