The galaxy is a satellite of Magalanic Cloud Milky Way, which is about 160,000 light-year away. New research is a supermasive black hole at its center. Credit: Marco Lorenzie
The large Magalanic Cloud (LMC) is one of the closest neighbors of Milky Way. It is a small, irregular galaxy that revolves in a milky manner, and is an easy naked-eye object from the Southern Hemisphere. One of our own only galaxies outside our own where the telescope can solve individual stars and small -scale structures, astronomers like to compare with Milky Way to check LMC and check the vice versa.
While large galaxies host central supermasive black holes (SMBH) as a rule, dwarf galaxies like LMC are more mixed. Astronomers have speculated about it that has a black hole, but the data has been innocent.
Now, the Gaia Space Telescope’s data, which tracked more than one billion stars to measure its movements and positions, has pointed to an amazing addition to this object that sits right in our cosmic backyard: It is 600,000 times the weight of a central black hole as much as the sun. Research has been accepted for publishing under the leadership of Jesse Jeevon Han of Harvard-Smithsonian Center for Astrophysics (CFA) The Astrophysical Journal.
Accelerated star
This discovery comes from a study of hypervellosity stars in Milky Way. These are such stars, as their name indicates, moving faster than its neighbors – Milky Way currently with the rest of the stars – up to 2.2 million miles per hour (1,000 kilometers per second). Astronomers thought that most of these hypervalocity stars reached those high speeds after the encounter with Milky Way’s central Black Hole, Dhanu A*. (Such fast stars were one of the biggest clues, inspired astronomers to find and understand greens.)
But when Han, a graduate student at CFA, saw a batch of hyperwellosity stars in Gaia data, he tracked his path for LMC, not towards the core of Milky Way.
There are not many things that can speed up a star in such a high speed. There are some methods being removed from a star or a tight cluster of stars that explode in a supernova. Close encounters with black holes are another. Black hole can usually “kick” a star for high speed than other methods, but there are no clear cutoffs.
What was for Han and colleagues was not just the speed of the stars, even high for hypervalocity stars – this was the way they clusters on the sky, in a tight group, dubbed Leo’s overgrowth because it is located within the boundaries of the Planetary Leo. This gave the team big clues to find out the origin of the stars.
“Since these stars are young and massive, Han said Astronomy“They have to come from the center of the disc or LMC – they are only two options.” And if they come from the disc, Han says, models say that the stars will spread over a large part of the sky. “This is to say, only one rejection from the center of the LMC can produce an overgrowth as tight as the excess of Leo.”
Zewear Luri, an astronomer physicist at the University of Barcelona and a member of the GAA data processing consortium, who was not involved with the study, which Han’s work is “very full and complete … very complete and complete … The findings may still be based on many beliefs and hypotheses in the future, but they indicate a part of a part of a part.
Leo overdanceness has been seen for a long time. In fact, in 2016, astronomers proposed Douglas Bubert and Vyan Evans to Cambridge University, Britain, even in LMC as a SMBH in LMC. But this has so far, with accurate data from gaia, to detect enough hypervellosity stars to its source to create the argument sound.
“Gaia, JC and co-writers have proved to use the latest data of their stellar team [our] Outlandish theory, “says Bobert.” Half of the Hyperwellosity stars we know in the Northern Hemisphere that even the big Magalanic clouds come from the cloud. ,
Surprisingly
Astronomers have known for some time that each major galaxy has a central SMBH. What is more, the shape of the black hole is quite estimated with the size of the galaxy, a specific astronomer called M-Sigma relationship. But dwarf galaxies do not always follow this rule, and LMC was not known for Black Hole. If confirmed, this black hole will be a major change of how astronomers understand the structure and development of our small neighbor.
On the other hand, Han’s team can measure how large a black hole must be on a large scale to get out the stars on measured velocities, and they calculate that it will be around 600,000 solar mass. This required to fit perfectly in the required M-Sigma relationship, given what we know about the overall mass of LMC.
Han says, “Therefore, while it is surprising how we found evidence for SMBH, the actual mass of SMBH is completely within the cause, and should have been required to some extent.”
looking ahead
Now when LMC has concrete clues for SMBH, astronomers will definitely see to confirm its existence. Common methods of looking for black hole include looking for X-rays and radio signals, which exit the area around the black hole as the material falls. Or, astronomers may be looking for more direct dynamic clues, such as an invisible star cluster moving around the central mass.
In addition, the data has been used by Han and their team, only the first three years of gaia data. A more complete data release for 2026 is determined, and the entire 10 -year decades of data of the observatory will be available. This will give more data to astronomers everywhere, to check how the stars proceed about, both in our galaxy and in LMC.
Baubert says that by proving the existence of SMBH of LMC, “JC and the team laid a guntal for astronomers to find the rest of the Hyperwellosity Star stream from the big Magalanic Cloud. It was found once it was found that this population of Hyperwellis stars was found along with our local galactic neighborhoods- in the last several hundred millions of years- the last several hundred millions of years- the last several hundred millions of years and the biggest years. Magalanic cloud dance.
