אסטרופיזיקאים “פותרים חתימה בסיסית של כוח המשיכה סביב חור שחור”

הפליטה מ-M87 נפתרה כעת לטבעת בהירה ודקה (מפת צבע כתומה), הנובעת מהרצף האינסופי של תמונות נוספות של אזור הפליטה, ומהתמונה הראשונית המפוזרת יותר, שנוצרה על ידי הפוטונים שמגיעים ישירות לכדור הארץ (ב קו מתאר כחול). כאשר צופים ברזולוציית ההדמיה של טלסקופ אופק אירועים, שני הרכיבים מטשטשים יחד. עם זאת, על ידי חיפוש בנפרד אחר הטבעת הדקה, ניתן לחדד את המבט של M87, ולבודד את טביעת האצבע של כוח הכבידה החזק. קרדיט: Broderick et al. 2022, ApJ, 935, 61

כאישור חי של חיזוי תיאורטי, מדענים הבחינו בטבעת חדה של אור שנוצרה על ידי פוטונים שמצלפים סביב גבו של סופר-מסיבי[{” attribute=””>black hole.

When astronomers revealed humanity’s historic first image of a black hole in 2019 – depicting a dark core encircled by a fiery aura of material falling toward it – they believed even richer imagery and insights were waiting to be extracted from the data.

Simulations predicted that there should be a thin, bright ring of light, hidden behind the glare of the diffuse orange glow, created by photons flung around the back of the black hole by its intense gravity.

Astrophysicist Avery Broderick led a team of researchers who used sophisticated imaging algorithms to essentially “remaster” the original imagery of the supermassive black hole at the center of the M87 galaxy.

“We turned off the searchlight to see the fireflies,” said Broderick, an associate faculty member at Perimeter Institute and the

By essentially “peeling off” elements of the imagery, says co-author Hung-Yi Pu, an assistant professor at National Taiwan Normal University, “the environment around the black hole can then be clearly revealed.”

To accomplish this, the team of researchers used a new imaging algorithm within the Event Horizon Telescope (EHT) analysis framework THEMIS to isolate and extract the distinct ring feature from the original observations of the M87 black hole. They were also able to detect the telltale footprint of a powerful jet blasting outward from the black hole.

The scientists’ findings both confirm theoretical predictions and offer new ways to explore these mysterious objects, which are thought to reside at the heart of most galaxies.

Black holes were long considered unseeable until scientists coaxed them out of hiding with the EHT, a globe-spanning network of telescopes. Using eight observatories on four continents, all pointed at the same spot in the sky and linked together with nanosecond timing; the EHT researchers observed two black holes in 2017.

The EHT collaboration first unveiled the supermassive black hole in M87 in 2019. Then in 2022, it revealed the comparatively small but tumultuous black hole at the heart of our own

Reference: “The Photon Ring in M87*” by Avery E. Broderick, Dominic W. Pesce, Roman Gold, Paul Tiede, Hung-Yi Pu, Richard Anantua, Silke Britzen, Chiara Ceccobello, Koushik Chatterjee, Yongjun Chen, Nicholas S. Conroy, Geoffrey B. Crew, Alejandro Cruz-Osorio, Yuzhu Cui, Sheperd S. Doeleman, Razieh Emami, Joseph Farah, Christian M. Fromm, Peter Galison, Boris Georgiev, Luis C. Ho, David J. James, Britton Jeter, Alejandra Jimenez-Rosales, Jun Yi Koay, Carsten Kramer, Thomas P. Krichbaum, Sang-Sung Lee, Michael Lindqvist, Iván Martí-Vidal, Karl M. Menten, Yosuke Mizuno, James M. Moran, Monika Moscibrodzka, Antonios Nathanail, Joey Neilsen, Chunchong Ni, Jongho Park, Vincent Piétu, Luciano Rezzolla, Angelo Ricarte, Bart Ripperda, Lijing Shao, Fumie Tazaki, Kenji Toma, Pablo Torne, Jonathan Weintroub, Maciek Wielgus, Feng Yuan, Shan-Shan Zhao and Shuo Zhang, 16 August 2022, The Astrophysical Journal.
DOI: 10.3847/1538-4357/ac7c1d

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