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http://dx.doi.org/10.1073/pnas.38.4.281 | DOI Listing |
Nature
October 2024
Institute of Astronomy, KU Leuven, Leuven, Belgium.
Massive stars are predominantly born in stellar associations or clusters. Their radiation fields, stellar winds and supernovae strongly impact their local environment. In the first few million years of a cluster's life, massive stars are dynamically ejected and run away from the cluster at high speed.
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August 2024
Astronomical Observatory, University of Warsaw, Warsaw, Poland.
The gravitational wave detectors have shown a population of massive black holes that do not resemble those observed in the Milky Way and whose origin is debated. According to a possible explanation, these black holes may have formed from density fluctuations in the early Universe (primordial black holes), and they should comprise several to 100% of dark matter to explain the observed black hole merger rates. If these black holes existed in the Milky Way dark matter halo, they would cause long-timescale gravitational microlensing events lasting years.
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May 2024
INAF - Istituto di Astrofisica e Planetologia Spaziali di Roma, Rome, Italy.
Magnetar giant flares are rare explosive events releasing up to 10 erg in gamma rays in less than 1 second from young neutron stars with magnetic fields up to 10 G (refs. ). Only three such flares have been seen from magnetars in our Galaxy and in the Large Magellanic Cloud in roughly 50 years.
View Article and Find Full Text PDFRethink of familiar object may boost odds that its name, offensive to some, will be changed.
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January 2024
Department of Astronomy, University of Florida, Gainesville, FL, USA.
The canonical picture of star formation involves disk-mediated accretion, with Keplerian accretion disks and associated bipolar jets primarily observed in nearby, low-mass young stellar objects (YSOs). Recently, rotating gaseous structures and Keplerian disks have been detected around several massive (M > 8 M) YSOs (MYSOs), including several disk-jet systems. All the known MYSO systems are in the Milky Way, and all are embedded in their natal material.
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