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Second Data Release from the European Pulsar Timing Array: Challenging the Ultralight Dark Matter Paradigm.
Phys Rev Lett
October 2023
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China.
Article Synopsis
- Pulsar Timing Array experiments are used to investigate the existence of ultralight dark matter particles by observing an ensemble of millisecond radio pulsars over several years.
- The second data release from the European Pulsar Timing Array focuses on a scenario where dark matter only interacts with regular matter through gravity.
- The findings indicate that while ultralight dark matter particles in a specific mass range cannot make up all of the local dark matter density, they can exist at a maximum local density of around 0.3 GeV/cm³.
Astronomers scramble to find work as storied observatory faces uncertain future.
View Article and Find Full Text PDFOrbital stability analysis and photometric characterization of the second Earth Trojan asteroid 2020 XL.
Nat Commun
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ESA NEO Coordination Centre, Largo Galileo Galilei, 1, 00044, Frascati, Italy.
Trojan asteroids are small bodies orbiting around the L or L Lagrangian points of a Sun-planet system. Due to their peculiar orbits, they provide key constraints to the Solar System evolution models. Despite numerous dedicated observational efforts in the last decade, asteroid 2010 TK has been the only known Earth Trojan thus far.
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