NewsScience: 2023
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Science June 7, 2023
Tracking Vanished Massive Stars by their Chemical Footprints
Astronomers have discovered a star on the outskirts of the Milky Way Galaxy with a chemical composition unlike anything they have ever seen. It matches theoretical expectations for the chemical footprint left behind by very massive, very early stars. This is the clearest evidence yet that the first stars included very massive stars. Models show such stars would not have left behind any other remnants, so a footprint like this is the best evidence that can be hoped for.
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Science May 18, 2023
First Observed Radio Waves from a Type Ia Supernova
For the first time, astronomers have observed radio waves emitted by a Type Ia supernova, a type of explosion originating from a white dwarf star. This provides important clues to understand how white dwarfs explode.
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Science May 15, 2023
Out of this World Control on Ice Age Cycles
A research team, composed of climatologists and an astronomer, have used an improved computer model to reproduce the cycle of ice ages (glacial periods) 1.6 to 1.2 million years ago. The results show that the glacial cycle was driven primarily by astronomical forces in quite a different way than it works in the modern age. These results will help us to better understand the past, present, and future of ice sheets and the Earth’s climate.
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Science April 28, 2023
Superflare with Massive, High-Velocity Prominence Eruption
A team of Japanese astronomers used simultaneous ground-based and space-based observations to capture a more complete picture of a superflare on a star. The observed flare started with a very massive, high-velocity prominence eruption. These results give us a better idea of how superflares and stellar prominence eruptions occur.
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Science April 27, 2023
Astronomers Image for the First Time a Black Hole’s Accretion Flow Together With a Powerful Jet
An international team of scientists has used new millimeter-wavelength observations to produce an image that shows, for the first time, both the ring-like structure that reveals the matter falling into the central black hole and the powerful relativistic jet in the prominent radio galaxy Messier?87.
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Science April 14, 2023
Playing Hide and Seek with Planets
An international team of astronomers announced the first exoplanet discovered through a combined approach of direct imaging and precision measurements of a star’s motion on the sky. This new method promises to improve the efficiency of exoplanet searches, paving the way for the discovery of an Earth twin.
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Science March 23, 2023
AI Finds that First Stars were Clustered Together
An international team has used artificial intelligence to analyze the chemical abundances of old stars and found indications that the very first stars in the Universe were born in groups rather than as isolated single stars. Now the team hopes to apply this method to new data from on-going and planned observation surveys to better understand the early days of the Universe.
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Science March 20, 2023
Small But Mighty: New Superconducting Amplifiers Deliver High Performance at Lower Power Consumption
Researchers have devised a new concept of superconducting microwave low-noise amplifiers for use in radio wave detectors for radio astronomy observations, and successfully demonstrated a high-performance cooled amplifier with power consumption three orders of magnitude lower than that of conventional cooled semiconductor amplifiers. This result is expected to contribute to the realization of large-scale multi-element radio cameras and error-tolerant quantum computers, both of which require a large number of low-noise microwave amplifiers.
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Science March 2, 2023
Resurrected Supernova Provides Missing-Link
Astronomers have discovered a supernova exhibiting unprecedented rebrightening at millimeter wavelengths, providing an intermediate case between two types of supernovae: those of solitary stars and those in close-binary systems.
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Science February 28, 2023
Spiral Pattern Gives Clue to how High-Mass Stars Form
New observations have revealed a spiral pattern in a disk of material around a still forming, but already high-mass, baby star. This indicates that there is gravitational instability in the disk, which has important implications for how high-mass stars form.
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