Results 91 to 100 of about 38,366 (276)
Journal of Fish Biology, EarlyView.Abstract In the context of current global change, variations in water temperature are one of the environmental conditions with serious consequences for marine life, including reproductive processes. In the small spotted catshark Scyliorhinus canicula, spermatogenesis occurs in spermatocysts composed of synchronously developing germ cells associated ...
Fabian Jeanne +4 more
wiley +1 more source
Hyperaccretion-driven Relativistic Jets from Massive Collapsars in Active Galactic Nucleus Disks
The Astrophysical JournalThe observable characteristics of gamma-ray bursts embedded in the accretion disk of active galactic nuclei (AGNs) are mainly determined by the jet propagation within the disk.
Yun-Feng Wei, Tong Liu, Bao-Quan Huang
doaj +1 more source
The Fermi Bubbles. I. Possible Evidence for Recent AGN Jet Activity in the Galaxy
, 2012 The Fermi Gamma-ray Space Telescope reveals two large gamma-ray bubbles in the Galaxy, which extend about 50 degrees (~ 10 kpc) above and below the Galactic center (GC) and are symmetric about the Galactic plane.
Bland-Hawthorn +29 more
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Microspherules Formed by Lightning Strikes
Meteoritics &Planetary Science, EarlyView.Abstract Natural microspherules are formed by high‐temperature processes and are present throughout the geologic record to the present day. We report the discovery of large numbers of microspherules recovered from a rock pavement in the Pilbara region, Western Australia.
M. R. Boyd, M. J. Genge, A. G. Tomkins
wiley +1 more source
The Origin of Keplerian Megamaser Disks
, 2012 Several examples of thin, Keplerian, sub-parsec megamaser disks have been discovered in the nuclei of active galaxies and used to precisely determine the mass of their host black holes.
Wardle, Mark, Yusef-Zadeh, Farhad
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Meteoritics &Planetary Science, EarlyView.Abstract The Atacama Desert in Chile is characterized by its high meteorite density and old meteorite terrestrial ages. In this work, we present new terrestrial ages derived from measurements of the concentration of cosmogenic 36Cl in the metal fraction of 51 ordinary chondrites collected over a 6.8 km2 area located in the Catalina Dense Collection ...
Carine Sadaka +13 more
wiley +1 more source
The Interstellar Medium of IRAS 08572+3915 NW: H3+ and Warm High Velocity CO
, 2006 We confirm the first detection of the molecular ion H3+ in an extragalactic object, the highly obscured ultraluminous galaxy IRAS 08572+3915 NW. We also have detected absorption lines of the fundamental band of CO in this galaxy.
B. J. McCall +7 more
core +2 more sources
Renaissance Studies, EarlyView.ABSTRACT During the fifteenth and sixteenth centuries, there was no statutory difference between cartography, drawing and painting. These activities were performed then by craftsmen who were part of a vast group under the umbrella of ‘mechanical arts’ and fell under the ‘artifex’ category. Artifex were experts in any particular art, whether a craftsman,
Vasco Medeiros
wiley +1 more source
Active Galactic Nucleus Star Dynamics Under the Influence of Outflow–Ambient Interactions
The Astrophysical JournalStars with outflows interacting with ambient gas experience accelerations arising from the gravitational feedback induced by the interaction structure.
Muxin Liu, Lile Wang, Peng Peng
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The nature of orbits in a prolate elliptical galaxy model with a bulge and a dense nucleus
, 2011 We study the transition from regular to chaotic motion in a prolate elliptical galaxy dynamical model with a bulge and a dense nucleus. Our numerical investigation shows that stars with angular momentum Lz less than or equal to a critical value Lzc ...
Caranicolas, Nicolaos D. +1 more
core +1 more source