In 2009-2013 M87* was observed by early-EHT prototype arrays, with telescopes located at three geographical sites in 2009-2012, and four sites in 2013. "With the incredible angular resolution of the EHT we could observe a billiard game being played on the Moon and not lose track of the score!" said Maciek Wielgus, an astronomer at Center for Astrophysics | Harvard & Smithsonian, Black Hole Initiative Fellow, and lead author of the paper. Together they form a virtual Earth-sized radio dish, providing a uniquely high image resolution. The EHT is a global array of telescopes, performing synchronized observations using the technique of Very Long Baseline Interferometry (VLBI). The full results appeared today in The Astrophysical Journal. The analysis reveals the behavior of the black hole image across multiple years, indicating persistence of the crescent-like shadow feature, but also variation of its orientation-the crescent appears to be wobbling. The EHT team has now used the lessons learned last year to analyze the archival data sets from 2009-2013, some of them not published before. In 2019, the Event Horizon Telescope (EHT) Collaboration delivered the first image of a black hole, revealing M87*-the supermassive object in the center of the M87 galaxy. For a part of the animation, image blurred to the EHT resolution is shown. Measured position angle of the bright side of the crescent is shown, along with a 42 microarcsecond ring. Video: An animation representing one year of M87* image evolution according to numerical simulations.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |