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Stars are large balls of plasma, predominantly hydrogen and helium. The birth, evolution and death of stars are of particular research interest. Other important topics include understanding the internal processes, such as fusion, that generate great quantities of radiation and the gravitational interactions between stars.
Analysis of gravitational waves from merging binary neutron stars was accelerated using machine learning, enabling full low-latency parameter estimation and enhancing the potential for multi-messenger observations.
Enhanced star formation rates in our galaxy during the past 2–4 Gyr is known from survey data, and this is likely linked to Sagittarius dwarf galaxy’s passage. Here, authors show an increase in oxygen (O) abundance during this period, suggesting satellite accretion contribution to the observed O abundances.
Stellar material falling back in supernova explosions plays a crucial role in the formation of magnetic fields for some magnetars. X-ray bursts of these ‘low-field’ magnetars are products of their complicated fields, produced in Tayler–Spruit dynamos.
Opacities are considered to be the source of the disagreement between theoretical solar models and helioseismic data. Here, the authors show solar opacity profiles derived from seismic inferences, which differs from theoretical values used in the solar models.
Numerous eclipses have been observed towards the binary central star of planetary nebula WeSb 1, probably caused by debris from disintegrated rocky bodies. This finding suggests that planetary systems undergo a violent evolution during the planetary nebula stage.
Using JWST, more than 40 individual stars have been detected in a distant galaxy, dating back to when the Universe was only half of its current age. The stars appear to be red (super)giants that are magnified by factors of hundreds.
The Prime Focus Spectrograph is an open-use instrument on the Subaru Telescope, just beginning scientific observations. It offers simultaneous optical and near-IR spectroscopy of nearly 2,400 objects in the same focal plane.
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