‘Thoughts-Blowing’ Scorching Gasoline Detected With Skirt Round Milky Approach’s Supermassive Black Gap

Astronomers have found a signature ‘hotspot’ round Sagittarius A*, the black gap on the middle of our galaxy.

Astronomers have noticed a ‘sizzling spot’ sign round Sagittarius A*[{” attribute=””>black hole at the center of our galaxy, using the Atacama Large Millimeter/submillimeter Array (

The Orbit of the Hot Spot Around Sagittarius A*

This shows a still image of the supermassive black hole Sagittarius A*, as seen by the Event Horizon Collaboration (EHT), with an artist’s illustration indicating where the modeling of the ALMA data predicts the hot spot to be and its orbit around the black hole. Credit: EHT Collaboration, ESO/M. Kornmesser (Acknowledgment: M. Wielgus)

The observations were made with ALMA in the Chilean Andes, during a campaign by the Event Horizon Telescope (EHT) Collaboration to image black holes. ALMA is — a radio telescope co-owned by the European Southern Observatory (ESO). In April 2017 the EHT linked together eight existing radio telescopes worldwide, including ALMA, resulting in the recently released first-ever image of Sagittarius A*. To calibrate the EHT data, Wielgus and his colleagues, who are members of the EHT Collaboration, used ALMA data recorded simultaneously with the EHT observations of Sagittarius A*. To the research team’s surprise, there were more clues to the nature of the black hole hidden in the ALMA-only measurements.

Utilizing ALMA, astronomers discovered sizzling fuel orbiting Sagittarius A*, the black gap on the middle of our galaxy, at 30% the pace of sunshine.

Coincidentally, among the observations had been made shortly after the explosion or burst of X-ray power emitted from the middle of our galaxy, which is seen to the bare eye.[{” attribute=””>NASA’s Chandra X-ray Observatory. These kinds of flares, previously observed with X-ray and infrared telescopes, are thought to be associated with so-called ‘hot spots’, hot gas bubbles that orbit very fast and close to the black hole.

“What is really new and interesting is that such flares were so far only clearly present in X-ray and infrared observations of Sagittarius A*. Here we see for the first time a very strong indication that orbiting hot spots are also present in radio observations,” says Wielgus, who is also affiliated with the Nicolaus Copernicus Astronomical Center, in Warsaw, Poland and the Black Hole Initiative at Harvard University, USA.

This video reveals an animation of a sizzling spot, a bubble of sizzling fuel, orbiting Sagittarius A*, a black gap 4 million instances extra large than our Solar that sits at our middle.[{” attribute=””>Milky Way. While the black hole (center) has been directly imaged with the Event Horizon Telescope, the gas bubble represented around it has not: its orbit and velocity are inferred from both observations and models. The team who discovered evidence for this hot spot — using the Atacama Large Millimeter/submillimeter Array (ALMA), in which

Credit: EHT Collaboration, ESO/L. Calçada (Acknowledgment: M. Wielgus)

“Perhaps these hot spots detected at infrared wavelengths are a manifestation of the same physical phenomenon: as infrared-emitting hot spots cool down, they become visible at longer wavelengths, like the ones observed by ALMA and the EHT,” adds Jesse Vos. He is a PhD student at Radboud University, the Netherlands, and was also involved in this study.

The flares were long thought to originate from magnetic interactions in the very hot gas orbiting very close to Sagittarius A*, and the new findings support this idea. “Now we find strong evidence for a magnetic origin of these flares and our observations give us a clue about the geometry of the process. The new data are extremely helpful for building a theoretical interpretation of these events,” says co-author Monika Moscibrodzka from Radboud University.

First Image of Our Black Hole Sagittarius A*

This is the first image of Sgr A*, the supermassive black hole at the center of our galaxy. It’s the first direct visual evidence of the presence of this black hole. It was captured by the Event Horizon Telescope (EHT), an array that linked together eight existing radio observatories across the planet to form a single “Earth-sized” virtual telescope. The telescope is named after the event horizon, the boundary of the black hole beyond which no light can escape. Credit: EHT Collaboration

ALMA allows astronomers to study polarized radio emission from Sagittarius A*, which can be used to unveil the black hole’s magnetic field. The team used these observations together with theoretical models to learn more about the formation of the hot spot and the environment it is embedded in, including the magnetic field around Sagittarius A*. Their research provides stronger constraints on the shape of this magnetic field than previous observations, helping astronomers uncover the nature of our black hole and its surroundings.

Milky Way Central Black Hole Location ALMA

This image shows the Atacama Large Millimeter/submillimeter Array (ALMA) looking up at the Milky Way as well as the location of Sagittarius A*, the supermassive black hole at our galactic center. Highlighted in the box is the image of Sagittarius A* taken by the Event Horizon Telescope (EHT) Collaboration. Located in the Atacama Desert in Chile, ALMA is the most sensitive of all the observatories in the EHT array, and ESO is a co-owner of ALMA on behalf of its European Member States. Credit: ESO/José Francisco Salgado (, EHT Collaboration

The observations confirm some of the previous discoveries made by the GRAVITY instrument at ESO’s

Milky Way Wide Field View

Wide-field view of the center of the Milky Way. This visible light wide-field view shows the rich star clouds in the constellation of Sagittarius (the Archer) in the direction of the center of our Milky Way galaxy. The entire image is filled with vast numbers of stars — but far more remain hidden behind clouds of dust and are only revealed in infrared images. This view was created from photographs in red and blue light and forming part of the Digitized Sky Survey 2. The field of view is approximately 3.5 degrees x 3.6 degrees. Credit: ESO and Digitized Sky Survey 2. Acknowledgment: Davide De Martin and S. Guisard (

The team is also hoping to be able to directly observe the orbiting gas clumps with the EHT, to probe ever closer to the black hole and learn more about it. “Hopefully, one day, we will be comfortable saying that we ‘know’ what is going on in Sagittarius A*,” Wielgus concludes.

More information

Reference: “Orbital motion near Sagittarius A* – Constraints from polarimetric ALMA observations” by M. Wielgus, M. Moscibrodzka, J. Vos, Z. Gelles, I. Martí-Vidal, J. Farah, N. Marchili, C. Goddi and H. Messias, 22 September 2022, Astronomy & Astrophysics.
DOI: 10.1051/0004-6361/202244493

The team is composed of M. Wielgus (Max-Planck-Institut für Radioastronomie, Germany [MPIfR]; Nicolaus Copernicus Astronomical Heart, Polish Academy of Sciences, Poland; Black Gap Initiative at Harvard College, USA [BHI]), M. Moscibrodzka (Division of Astrophysics, Radboud College, The Netherlands [Radboud]), J. Vos (Radboud), Z. Gelles (Heart for Astrophysics | Harvard & Smithsonian, USA and BHI), I. Martí-Vidal (Universitat de València, Spain), J. Farah (Las Cumbres Observatory, USA; College California, Santa Barbara, USA), N. Marchili (Italian ALMA Regional Heart, INAF-Istituto di Radioastronomia, Italy and MPIfR), C. Goddi (Division of Physics, College of Cagliari, Italy and Universidade de São Paulo, Brazil) , and H. Messias (Joint ALMA Observatory, Chile).

The Atacama Giant Millimeter/submillimeter Array (ALMA), a global astronomical facility, is a three way partnership between ESO, the US Nationwide Science Basis (NSF) and Japan’s Nationwide Institutes of Pure Sciences (NINS). working for the Republic of Chile. ALMA is funded by ESO on behalf of its member international locations, by NSF along with the Nationwide Analysis Council of Canada (NRC) and the Ministry of Science and Know-how (MOST) and NINS collectively of Academia Sinica (AS) in Taiwan. and the Korea Astronomy and Area Science Institute (KASI). The development and operation of ALMA is managed by ESO on behalf of its member international locations; from the Nationwide Radio Astronomy Observatory (NRAO), operated by Related Universities, Inc. (AUI), on behalf of North America; and from the Nationwide Astronomical Observatory of Japan (NAOJ) on behalf of East Asia. The Joint ALMA Observatory (JAO) supplies joint management and administration for the development, deployment and operation of ALMA.

The European Southern Observatory (ESO) permits scientists world wide to find the secrets and techniques of the Universe for the good thing about all. We design, construct and function satellites – which astronomers use to resolve thrilling questions and unfold the curiosity of astronomy – and promote worldwide cooperation in astronomy. Based as a global group in 1962, at the moment ESO is supported by 16 Member States (Austria, Belgium, Czech Republic, Denmark, France, Finland, Germany, Eire, Italy, Netherlands, Poland, Portugal, Spain, Sweden , Switzerland, and the UK), with the host nation Chile and with Australia as a strategic companion. ESO’s headquarters, customer middle and planetarium, ESO Supernova, are situated close to Munich in Germany, whereas the Chilean Atacama Desert, a good looking place with distinctive circumstances for viewing the sky, hosts the telescope. . ESO operates three observatories: La Silla, Paranal and Chajnantor. At Paranal, ESO operates the Very Giant Telescope and the Very Giant Telescope Interferometer, in addition to two survey telescopes, the infrared VISTA and the VLT Survey Telescope. At Paranal ESO can even host and function the Cherenkov Telescope Array South, the biggest and most delicate gamma-ray observatory on the planet. Along with worldwide companions, ESO operates APEX and ALMA at Chajnantor, two services that monitor the sky at millimeter and submillimeter intervals. At Cerro Armazones, close to Paranal, we’re constructing “the world’s largest eye on the sky” — ESO’s Extraordinarily Giant Telescope. From our workplace in Santiago, Chile we help our work within the nation and talk with our companions and the Chilean group.

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