In the center of the Milky Way, unusual outbreaks were noted

In the center of the galaxy observed for decades.

Sagittarius a * (Sgr A *) is a supermassive black hole located in the center of the Milky Way, located 100 times closer than any other supermassive black hole nearby. Given this fact, Sgr A * is a prime candidate for studying the luminescence of a substance when it is accreted into a black hole.

The modeling of the variability mechanisms of the world is a daunting challenge for our understanding of accretion in supermassive black holes, but it is thought that the relationship between the time of eruptions at different wavelengths may reveal space structure information: if the warmer material near a black hole. One of the main obstacles to progress in this area is the scarcity of simultaneous observations at different wavelengths.

Astronomers Giovanni Fazio, Joe Hora, Steve Wilner, Matt Ashby, Mark Carved and Howard Smith of the Harvard-Smithsonian Astrophysical Center, along with their colleagues, conducted a series of multi-length observation campaigns involving the use of the IRAC camera on the telescope, "Spitzer". , the "Chandra" X-ray observatory, as well as the Keck ground observatory and the Array submillimeter complex (SMA). Their research described in the journal Astrophysical. "Spitzer" could constantly monitor fluctuations in the black hole for 23.4 hours during each session, which would not create a terrestrial observatory.

Multi-wavelength view of the region around the galactic center of the Milky Way in X-ray (blue), infrared (red) and optical spectra. Astronomers measured the events of eruptions at different wavelengths emanating from a supermassive black hole in the center. © X-ray: NASA / CXC / UMass / D.

Computer modeling of radiation near a black hole is a complex task that requires, among other things, simulations of heat accumulation and radiation, as well as predictions of general relativity about how this radiation will see the observer (since all this happens). near a black hole is likely to turn). Theorists suspect that radiation at shorter wavelengths appears closer to the object and that a cooler radiation is already far away from it. In other words, the first is short-wave radiation followed by long-term radiation.

Therefore, the timer can display the distance between these zones. Indeed, in previous observations, some of which belonged to the same team, scientists discovered that the warm alloying process of the focus was preceded by submillimetric eruptions observed in the AMS. In their article, researchers report two outbreaks, it is likely that they violate these models and other obvious: the first event occurred simultaneously at all wavelengths and the second, X-ray and submillimetric alloy process outbreaks occurred in one hour, that is, not quite the same but still very close to each other. New observations will be developed during the next simultaneous campaigns.

About the author

Jan Hartman

Jan Hartman has been a writer since 2013. Before that, she wrote about the young teens and the family dynamics of Styles. She was a correspondent for the legal affairs of the metro.
Before joining The Sivertelegram, Jan Hartman was an editor at Village Voice and freelancer for Newsday, the Wall Street Journal, GQ and Mirabella.