GMVA20B-220

Jet Meets Black Hole in M87: Breaking New Ground with GMVA+ALMA

Abstract

The black hole shadow in the nearby radio galaxy M87 has been imaged for the first time by the EHT only very recently. This opens up a new era of direct imaging studies of the vicinity of black holes. However, it is still unclear how the powerful M87 jet is launched and accelerated to relativistic speeds. The most important information for understanding these processes can only be extracted by resolving the jet base. This is now achievable with GMVA+ALMA observations. Here we propose new GMVA+ALMA observations of M87 for two VLBI epochs over a time interval of approx. 5 days, aiming at investigating 1) the origin of the jet either launched directly from the spinning black hole or from the inner part of the accretion disk, 2) the jet magnetic field structure to test the magnetic jet acceleration model, and 3) the evolution of the jet base on short (weekly) and long (yearly) timescales, which will provide additional, independent constraints on the jet launching mechanism and the black hole spin. Our proposed observations will complement the planned 1.3 mm VLBI observations with the EHT in 2021 to complete the picture of jet launching in M87.

Investigators

Name	Institution
Fumie Tazaki	National Astronomical Observatory of Japan ; Tokyo Electron Technology Solutions Ltd.
Laurent Loinard	México, Universidad Nacional Autónoma de
David Sanchez-Arguelles	Astrofísica, Óptica y Electrónica, Instituto Nacional de
Katherine Bouman	Massachusetts Institute of Technology; California Institute of Technology
Nicholas MacDonald	Boston University; Max-Planck-Institut für Radioastronomie; Mississippi, University of
Wu Jiang	Shanghai Astronomical Observatory, CAS
Maciek Wielgus	Max-Planck-Institut für Radioastronomie; Smithsonian Astrophysical Observatory
John Wardle	Brandeis University
Pablo de Vicente	Yebes, Centro Astronómico de
Kenji Toma	Tohoku University
Hotaka Shiokawa	Center for Astrophysics | Harvard & Smithsonian
zhi-qiang shen	Shanghai Astronomical Observatory, CAS
Karl Schuster	Institut de Radio Astronomique Millimétrique
Tuomas Savolainen	Max-Planck-Institut für Radioastronomie; Aalto yliopisto
Kazi Rygl	Istituto Nazionale di Astrofisica
Helge Rottmann	Max-Planck-Institut für Radioastronomie
Eduardo Ros	Max-Planck-Institut für Radioastronomie; València, Universitat de
Luciano Rezzolla	Frankfurt am Main, Goethe-Universität
Hung-Yi Pu	Perimeter Institute for Theoretical Physics
Oliver Porth	Amsterdam, Universiteit van; Frankfurt am Main, Goethe-Universität
Yurii Pidopryhora	Max-Planck-Institut für Radioastronomie
Monica Orienti	Istituto Nazionale di Astrofisica; Bologna, Universita degli Studi di
Scott Noble	Tulsa, University of
Gopal Narayanan	Massachusetts at Amherst, University of
Hiroshi Nagai	National Astronomical Observatory of Japan ; Japan Aerospace Exploration Agency
Yosuke Mizuno	Shanghai Jiao Tong University; Frankfurt am Main, Goethe-Universität
Shin Mineshige	Kyoto University
Monika Moscibrodzka	Nijmegen, Radboud Universiteit
Hugo Messias	Joint ALMA Observatory
Jonathan McKinney	Maryland, University of
Satoki Matsushita	Academia Sinica
Alan Marscher	Boston University
Ivan Marti-Vidal	València, Universitat de
Sera Markoff	Amsterdam, Universiteit van
Andrei Lobanov	Max-Planck-Institut für Radioastronomie
Elisabetta Liuzzo	Istituto Nazionale di Astrofisica
Michael Lindqvist	Chalmers University of Technology
Shoko Koyama	National Astronomical Observatory of Japan ; Academia Sinica
Motoki Kino	National Astronomical Observatory of Japan ; Korea Astronomy and Space Science Institute
Michael Johnson	California at Santa Barbara, University of; Center for Astrophysics | Harvard & Smithsonian
Michael Janssen	Max-Planck-Institut für Radioastronomie; Nijmegen, Radboud Universiteit
David James	Smithsonian Astrophysical Observatory
Sara Issaoun	Center for Astrophysics | Harvard & Smithsonian; Nijmegen, Radboud Universiteit
Makoto Inoue	Academia Sinica
Violette Impellizzeri	National Radio Astronomy Observatory; Leiden, University of; Joint ALMA Observatory
David Hughes	Astrofísica, Óptica y Electrónica, Instituto Nacional de
Mareki Honma	National Astronomical Observatory of Japan
Paul Ho	Academia Sinica; East Asian Observatory
Ruben Herrero-Illana	European Southern Observatory
Marcello Giroletti	Istituto Nazionale di Astrofisica
Jose L. Gomez	Andalucía, Instituto de Astrofísica de
Gabriele Giovannini	Istituto Nazionale di Astrofisica
Vincent Fish	Haystack Observatory
Heino Falcke	Netherlands Institute for Radio Astronomy; Nijmegen, Radboud Universiteit
Akihiro Doi	Japan Aerospace Exploration Agency
Shep Doeleman	Center for Astrophysics | Harvard & Smithsonian
Geoffrey Crew	Massachusetts Institute of Technology
Ilje Cho	Korea Astronomy and Space Science Institute; Andalucía, Instituto de Astrofísica de; Korea University of Science and Technology
Sunil Chandra	North-West University
Avery Broderick	Waterloo, University of
Michael Bremer	Institut de Radio Astronomique Millimétrique
Silke Britzen	Max-Planck-Institut für Radioastronomie
Geoffrey Bower	Academia Sinica
Lindy Blackburn	Center for Astrophysics | Harvard & Smithsonian
Rebecca Azulay	València, Universitat de
Tony Zensus	National Radio Astronomy Observatory; Max-Planck-Institut für Radioastronomie
Kazunori Akiyama	Massachusetts Institute of Technology; Haystack Observatory
Jordy Davelaar	Columbia University
Masanori Nakamura	Academia Sinica; National Institute of Technology, Hachinohe College
Tomohisa Kawashima	Tokyo, University of
Jongho Park	Kyung Hee University
Jae-Young Kim	Max-Planck-Institut für Radioastronomie; Kyungpook National University
Kazuhiro Hada	Istituto Nazionale di Astrofisica; National Astronomical Observatory of Japan ; Nagoya City University
Keiichi Asada	Academia Sinica
Thomas Krichbaum	Max-Planck-Institut für Radioastronomie
Rusen Lu *	Max-Planck-Institut für Radioastronomie; Shanghai Astronomical Observatory, CAS
GBT Operator	Green Bank Observatory

* indicates the PI