Tag: Gaia BH2

Have we detected the first medium-sized #BlackHole? 🤔 #shorts

Our #Gaia spacecraft has captured a huge dark blob, 800 times more massive than our Sun which seems to be squeezed into a surprisingly small volume of space suggesting it could be an intermediate-mass black hole.

Read more 👉 https://www.esa.int/ESA_Multimedia/Videos/2023/05/Has_Gaia_found_missing_link_in_black_hole_evolution/

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#Gaia
#Blackhole

June 12, 2023
We discovered a unique #BlackHole 🕳️🕳️ #shorts

Using data from our Gaia mission, astronomers have discovered not only the closest but also the second closest black hole to Earth. The black holes, Gaia BH1 and Gaia BH2, are respectively located just 1560 light-years away from us in the direction of the constellation Ophiuchus and 3800 light-years away in the constellation Centaurus. In galactic terms, these black holes reside in our cosmic backyard.

The two black holes were discovered by studying the movement of their companion stars. A strange ‘wobble’ in the movement of the stars on the sky indicated that they are orbiting a very massive object. In both cases, the objects are approximately ten times more massive than our Sun. Other explanations for these massive companions, like double-star systems, were ruled out since they do not seem to emit any light.

📹 @EuropeanSpaceAgency
📸 ESA/Gaia/DPAC; Creative commons CC BY-SA 3.0 IGO

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#GAIA
#BlackHoles

April 18, 2023
Gaia discovers a unique black hole

ESA’s Gaia mission has helped discover a new kind of black hole. The new family already has two members, and both are closer to Earth than any other black hole that we know of.

The two black holes were discovered by studying ultra-precise measurements of stellar positions and motions in Gaia’s third data release.

A strange ‘wobble’ in the movement of two stars on the sky indicated that they are orbiting a very massive object. In both cases, the objects are approximately ten times more massive than our Sun. Other explanations for these massive companions, like double-star systems, were ruled out since they do not seem to emit any light.

Gaia’s second black hole, BH2, is located 3800 light-years away from Earth. It is a binary system consisting of a red giant star and likely a black hole.

In this animation of Gaia BH2, created in Gaia Sky, the orbits are accurately sized, but the back hole diameter is not to scale.

Credit: ESA/Gaia/DPAC

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#Earth
#EarthObservation

April 4, 2023