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A huge black hole in the heart of the Milky Way

BingMag.com A <b>huge</b> <b>black</b> <b>hole</b> in the <b>heart</b> of the <b>Milky</b> Way

A massive black hole called the Arc *, located at the heart of our Milky Way galaxy, is now more in the spotlight than ever. Sagittarius A, often abbreviated to Sgr A, is a very massive black hole at the center of our spiral galaxy, the Milky Way.

There are still many mysteries surrounding this massive black hole. But experts are not entirely unfamiliar with it, and observations of the Event Horizon Telescope promise more information.

Star-mass black holes and medium-mass black holes form when stars form Massive fusion stops the nucleus and can no longer hold its own against complete gravitational collapse. But the process that forms macro-mass black holes like Sagittarius A is not yet known, because there is no star large enough to land directly in a black hole of this size.

Two possible mechanisms for this are, first, black holes. There are smaller ones that grow this size by swallowing gas and dust from their surroundings, and smaller black holes that reach this massive size by continuous merging.

Arc size *

In 2008, astronomers Reinhard Genzel and Andrea Ghez estimated that the mass of the arc * should be 4.3 million times the mass of the Sun. Astronomers have also calculated that the diameter of the massive Milky Way black hole is about 23.5 million kilometers. This is very small compared to the Milky Way itself, which is 100,000 light-years wide and 1,000 light-years thick. It is found and occasionally pours masses of matter into it, causing weak X-ray flashes. The accretion disk also emits X-rays due to the friction in it, which raises the temperature to 10 million degrees Celsius.

There is still a lot to learn about the arc *, but the first image From the central black hole of the Milky Way galaxy taken by the Event Horizon Telescope (EHT), it could reveal more secrets about the cosmic mass that formed our galaxy.

BingMag.com A <b>huge</b> <b>black</b> <b>hole</b> in the <b>heart</b> of the <b>Milky</b> Way

The area of the arc black hole * from Chandra's point of view
NASA/CXC/Caltech/M.Muno et al.

Observations of an arc *

Everything in our 13.6 billion-year-old galaxy, including the arc, which is 26,000 light-years away . black holes are very difficult to detect and are usually identified only by the effects they have on their environment. This difficulty is due not only to the fact that they do not emit light, but also to trap photons behind a boundary called the event horizon, which makes it almost impossible to study them directly in the visible light spectrum.

The ground is even harder because it is covered in a thick layer of middle dust. Fortunately, astronomers have developed other ways to obtain information from the arc. For example, the mass of a central mass and its radius can be determined by observing the effect of gravity on surrounding objects. They monitored 11.4 km/h. The star also has a very elliptical 16-year-old orbit.

  • Astronomers took very clear images of the center of the Milky Way
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    arc detection method *

    BingMag.com A <b>huge</b> <b>black</b> <b>hole</b> in the <b>heart</b> of the <b>Milky</b> WayX-ray- NASA/UMass/D.Wang et al. It dates back to the 1930s, when Karl Jansky received a radio signal emitted from a constellation in the direction of the MilkyWaygalaxy.

    Then in February 1974 the source of these signals A compact radio called an arc * at the center of the galaxy by astronomers Bruce Balick and Robert L. Brown "(Robert L. Brown) was identified. It was not until the 1980s that astronomers formulated the idea that the central compact mass was probably an inconceivable black hole with dimensions up to that point.

    And sub-millimeters to infer a compact mass 3 million times the mass of the Sun. Why are black holes the scariest objects in the universe?

Over the next decade, astronomers Other possible alternatives to the nature of the mass, including highly dense star clusters, continued to be rejected, reinforcing the idea that the "arc *" is a very massive black hole.

conclusive evidence The arc-compact mass * is a massive black hole was introduced in 2018 when astronomers used the Very Large Telescope (VLT) of the Southern European Observatory (ESO) to emit magnetic interactions from hot gas masses close to the black hole at a speed of about 30%. The light moved, they observed. These observations were exactly in line with the theoretical predictions of hotspots orbiting a black hole four million times the mass of the sun.

Does an arc * devour the Milky Way?

BingMag.com A <b>huge</b> <b>black</b> <b>hole</b> in the <b>heart</b> of the <b>Milky</b> Way

Graphic design of an active galactic nucleus
Credit: ESA/NASA, the AVO project and Paolo Padovani

It is a common misconception that black holes absorb all matter. Instead, they grab any matter that is very close to them. So, for example, if the sun were replaced by a black hole, the earth would remain steady in its orbit, although it would no longer receive heat and light.

Many black holes carry matter, gas, dust, or matter. Isolated from adjacent stars, they consume them in a Way that encapsulates them in an accretion tablet and gradually collapses into the center of the tablet, where the black hole is located.

Following the event, violent conditions in the tablet Additionally, it generates powerful emissions and jets from an area called the Active Galactic Nucleus (AGN). The arc * does not currently swallow enough matter to form an active galactic nucleus, and another star or mass must hit it almost directly to be consumed in a black hole.

  • Cosmic tsunami; The most energetic current observed in the universe

However, when the Milky Way galaxy collides with the stars of the Andromeda Galaxy in about 4 billion years, another potential black hole Makes it much larger, this trend can change.

Cover photo: Graphic design (with unrealistic dimensions) from a close-up view of the arc *
Credit: iStock


Source: Space

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