Focus on First Sgr A* Results from the Event Horizon Telescope
We present the first image of the Galactic Center black hole, Sagittarius A*. Identified nearly 50 years ago as the nearest supermassive black hole candidate and among the most studied astrophysical objects, Sgr A* is the ultimate laboratory for black hole astrophysics.
[2311.08680] First Sagittarius A* Event Horizon Telescope Results. I ...
2023年11月15日 · We present the first Event Horizon Telescope (EHT) observations of Sagittarius A* (Sgr A ∗), the Galactic center source associated with a supermassive black hole. These observations were conducted in 2017 using a global interferometric array of eight telescopes operating at a wavelength of λ = 1.3mm.
The Event Horizon Telescope
2012年1月18日 · In 2022, the Event Horizon Telescope Collaboration (EHTC) published the first image of the black hole in the Milky Way Galactic Center, Sagittarius A* (Sgr A*; 1). The image shows a ring-like structure with a central depression, consistent with the...
An independent hybrid imaging of Sgr A* from the data in EHT …
2024年10月25日 · We propose that the ring structure found by the Event Horizon Telescope Collaboration (EHTC) as the black hole shadow of Sgr A*is an artifact by the bumpy PSF (Point Spread Function) of the EHT2017. The imaging using sparse u-v …
Response to An Independent Analysis of EHTC Imaging of Sgr A
2024年11月6日 · In 2022, the Event Horizon Telescope Collaboration (EHTC) published the first image of the black hole in the Milky Way Galactic Center, Sagittarius A* (Sgr A*; 1). The image shows a ring-like structure with a central depression, consistent with the predictions of Einstein’s theory of general relativity.
人馬座A* - 维基百科，自由的百科全书
人馬座A*（Sagittarius A*，簡寫為Sgr A*，星號*讀作「star」或「星」 [3] ）是個位於銀河系 中心的超大質量黑洞 [4] [5] [6] 。 它位於星座 人馬座 和 天蠍座 的邊界附近，大約位於 黃道 以南5.6° [ 7 ] ，視覺上接近 蝴蝶星團 （M6）和 尾宿八 （天蠍座λ）。
Abstract - Event Horizon Telescope
We present the first Event Horizon Telescope (EHT) observations of Sagittarius A* (Sgr A*), the Galactic center source associated with a supermassive black hole. These observations were conducted in 2017 using a global interferometric array of eight ...
Modeling the shadow of Sgr A* through an eclipsing black hole
2025年2月22日 · The Event Horizon Telescope (EHT) observations of Sgr A* resolved the photon ring at the galactic centre, revealing a diameter of 51.8 μas. The ring-like structure is consistent with that of a Kerr black hole. However, the source of the high bright regions in the image and the time variability remain an open question.
independent hybrid imaging of Sgr A* from the data in EHT 2017 ...
2024年5月1日 · We propose that the ring structure found by the Event Horizon Telescope Collaboration (EHTC) as the black hole shadow of Sgr A* is an artefact caused by the bumpy point spread function (PSF) of the EHT 2017 data. The imaging using sparse u-v data requires detailed scrutiny of the PSF.
Astronomers snap first-ever image of supermassive black hole ...
2022年5月12日 · The new image of Sgr A* follows the first-ever image of a black hole, which was obtained by the EHT in 2019. That groundbreaking image was of M87*, the supermassive black hole at the center of Messier 87, a galaxy located 53 million light years from Earth.