Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign

Understand

In 2017, the Event Horizon Telescope (EHT) Collaboration succeeded in capturing the first direct image of the center of the M87 galaxy.

• The asymmetric ring morphology and size are consistent with theoretical expectations for a weakly accreting supermassive black hole of mass approximately 6.5 x 10^9 M_solar.
• The EHTC also partnered with several international facilities in space and on the ground, to arrange an extensive, quasi-simultaneous multi-wavelength campaign.
• This Letter presents the results and analysis of this campaign, as well as the multi-wavelength data as a legacy data repository.