Results 81 to 90 of about 585 (184)
Radiative Forcing and Ozone Depletion of a Decade of Satellite Megaconstellation Missions
Earth's Future, Volume 14, Issue 5, May 2026.Abstract Satellite megaconstellations (SMCs) are driving rapid increases in rocket launch and re‐entry rates, emitting pollutants throughout the atmosphere. The environmental impact of SMCs lacks characterization to determine the need for regulation. We utilize a global 3D emission inventory of recent (2020–2022) space activity that distinguishes SMC ...
Connor R. Barker +12 more
wiley +1 more source
Natal Kick by Early-asymmetrical Pairs of Jets to the Neutron Star of Supernova Remnant S147
The Astrophysical JournalWe analyze the bipolar morphology of the jet-shaped core-collapse supernova remnant (CCSNR) S147 and its neutron star (NS) kick velocity, and suggest that two pairs of unequal, opposite jets contributed to the NS kick velocity.
Dmitry Shishkin, Ealeal Bear, Noam Soker
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GalaxiesI demonstrate the usage of planetary nebulae (PNe) to infer that a pair of jets shaped the ejecta of the core-collapse supernova (CCSN) SN 1987A. The main structure of the SN 1987A inner ejecta, the ‘keyhole’, comprises two low-intensity zones.
Noam Soker
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The Astrophysical JournalHow a seemingly “dead” host galaxy provides fuel for its active galactic nucleus (AGN) remains an unresolved problem. Using the Five-hundred-meter Aperture Spherical radio Telescope (FAST), we present a new high-sensitivity atomic-hydrogen (H i ...
Jin-Long Xu +6 more
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Jet precession in active galaxies
The Astrophysical Journal, 1988 The formation and evolution of massive binary black holes in galactic nuclei are studied with respect to the loss-cone filling model for the fueling of massive black holes in AGN during the final stage of galaxy mergers. A relation between the precession period of the jet and the fueling rate of the central hole has been obtained.
openaire +3 more sources
Jet Interactions with the Hot Halos of Clusters and Galaxies
, 2007 X-ray observations of cavities and shock fronts produced by jets streaming through hot halos have significantly advanced our understanding of the energetics and dynamics of extragalactic radio sources. Radio sources at the centers of clusters have dynamical ages between ten and several hundred million years.
McNamara, B.R. +5 more
openaire +3 more sources
The Astrophysical JournalCoupling between relativistic jets launched by accreting supermassive black holes and the surrounding gaseous media is a vital ingredient in galaxy evolution models.
Grayson C. Petter +3 more
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The Astrophysical JournalThe existence of a population of massive quiescent galaxies with little to no star formation poses a challenge to our understanding of galaxy evolution.
Timothy M. Heckman +3 more
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The Astrophysical JournalWinds and jets are symbiotic when the accretion rate is low, according to black hole accretion theory. Both components are potentially important for active galactic nucleus (AGN) feedback, but previous works typically include only jets with free ...
Minhang Guo +3 more
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"Fermi" bubbles are bursting from our galaxy. Their origins remain a mystery. [PDF]
Proc Natl Acad Sci U S A, 2023 Mann A.
europepmc +1 more source