GMVA21A-233

Resolving the twin-jet base in NGC 1052

Abstract

Recent results from the first GMVA+ALMA observation of Sgr A* found evidence for a symmetrical morphology of the unscattered source structure, suggesting an advection-dominated accretion flow (ADAF) to reside in the center of a low-luminous AGN (LLAGN). At a distance of only 20Mpc and a low declination of -8 degrees the LLAGN NGC1052 reveals a two-sided jet, oriented close to the plane of the sky. Millimeter VLBI observations expose one central bright emission feature, that is isolated from the jets at 86 GHz. Previous GMVA observations could not distinguish whether this feature is a blend of both jet bases or if at least part of the emission originates from the accretion disk, maybe an ADAF. We request GMVA observations, which will provide an unprecedented high-fidelity image at 3-mm. In this way we will finally resolve the accretion disk and the collimation and acceleration region in both jets. Hence, NGC 1052 is the ideal target to test whether the center of LLAGN sources contain an ADAF.

Investigators

Name	Institution
David Sanchez-Arguelles	Astrofísica, Óptica y Electrónica, Instituto Nacional de
David Hughes	Astrofísica, Óptica y Electrónica, Instituto Nacional de
Manel Perucho	València, Universitat de
Christan Fromm	Max-Planck-Institut für Radioastronomie; Frankfurt am Main, Goethe-Universität
Thomas Krichbaum	Max-Planck-Institut für Radioastronomie
Matthias Kadler	Würzburg, Universität
Eduardo Ros	Max-Planck-Institut für Radioastronomie; València, Universitat de
Anne-Kathrin Baczko *	Max-Planck-Institut für Radioastronomie; Chalmers University Of Technology
GBT Operator	Green Bank Observatory

* indicates the PI