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BHI Colloquium

Monday, October 28, 2024
11:00 AM

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BHI Colloquium

Laurent Loinard

Description

Black hole astrometry

Abstract: Very Long Baseline Interferometry (VLBI) is intimately linked to black holes and their astrometry. This relation goes both ways: VLBI astrometry has, for instance, enabled exquisitely accurate determinations of (i) black hole properties through precise distance measurements, (ii) the motion of the supermassive black hole at the center of the Milky Way, and (iii) the (local) Hubble constant value thanks to megamaser sources. Conversely, distant black holes are the anchors used for all VLBI astrometry.

In this colloquium, I will provide a review of these topics, and discuss how the intimate relationship between black holes and astrometry will change with the advent of the future generation of VLBI arrays (particularly the ngEHT and the ngVLA).

 

When

Monday, October 28, 2024 11:00 AM

Where

BHI Publication

Expanding Sgr A* dynamical imaging capabilities with an African extension to the Event Horizon Telescope

April 1, 2023
Kantzas, D.; Markoff, S.; Lucchini, M.; Ceccobello, C.; Chatterjee, K.
Astrophysical jets are relativistic outflows that remain collimated for remarkably many orders of magnitude. Despite decades of research, the…
Read The BHI Publication