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A structured jet explains the extreme GRB 221009A
Kouveliotou, Chryssa; Buckley, David A. H.; Hammerstein, Erica +29 more
Long-duration gamma-ray bursts (GRBs) are powerful cosmic explosions, signaling the death of massive stars. Among them, GRB 221009A is by far the brightest burst ever observed. Because of its enormous energy ( E iso ≈ 10 55 erg) and proximity ( z ≈ 0.15), GRB 221009A is an exceptionally rare event that pushes the limits of our theories. We present…
A radio pulsar phase from SGR J1935+2154 provides clues to the magnetar FRB mechanism
Göğüş, Ersin; Li, Di; Zhu, Weiwei +34 more
The megajansky radio burst, FRB 20200428, and other bright radio bursts detected from the Galactic source SGR J1935+2154 suggest that magnetars can make fast radio bursts (FRBs), but the emission site and mechanism of FRB-like bursts are still unidentified. Here, we report the emergence of a radio pulsar phase of the magnetar 5 months after FRB 20…
Giant tidal tails of helium escaping the hot Jupiter HAT-P-32 b
Vanderburg, Andrew; Cochran, William D.; Endl, Michael +14 more
Capturing planets in the act of losing their atmospheres provides rare opportunities to probe their evolution history. This analysis has been enabled by observations of the helium triplet at 10,833 angstrom, but past studies have focused on the narrow time window right around the planet's optical transit. We monitored the hot Jupiter HAT-P-32 b us…
Complex organosulfur molecules on comet 67P: Evidence from the ROSINA measurements and insights from laboratory simulations
Ehlmann, Bethany L.; Brown, Michael E.; Choukroun, Mathieu +9 more
The ROSINA (Rosetta Orbiter Spectrometer for Ion and Neutral Analysis) instrument aboard the Rosetta mission revolutionized our understanding of cometary material composition. One of Rosetta's key findings is the complexity of the composition of comet 67P/Churyumov-Gerasimenko. Here, we used ROSINA data to analyze dust particles that were volatili…