Science, Space and Technology News 2023
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Credit: ESA/Gaia/DPAC, CC BY-SA 3.0 IGO, Acknowledgments: Michele Trabucchi, Nami Mowlavi and Thomas Lebzelter The mission’s latest ‘focused product release’ builds further on this, providing many new and improved insights into the space around us. The release brings exciting and unexpected science: findings that go far beyond what Gaia was initially designed to discover and dig deep into our cosmic history.and beyond. However, there remained gaps in our mapping.
To patch the gaps in our maps, Gaia selected Omega Centauri, the largest globular cluster that can be seen from Earth and a great example of a ‘typical’ cluster. Rather than just focusing on individual stars, as it typically would, Gaia enabled a special mode to truly map a wider patch of sky surrounding the cluster’s core every time the cluster came into view.
The new stars revealed in Omega Centauri mark one of the most crowded regions explored by Gaia so far..
The team identified the candidates from an extensive list of 3,760,032 possible quasars . Five of the possible lenses are potential Einstein crosses, rare lensed systems with four different image components shaped like a cross. “Gaia is a real lens-seeker,” says co-author Christine Ducourant of Laboratoire d’Astrophysique de Bordeaux, France, and a member of the Gaia collaboration. “Thanks to Gaia, we’ve found that some of the objects we see aren’t simply stars, even though they look like them. They’re actually really distant lensed quasars – extremely bright, energetic galactic cores powered by black holes.
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