Results 31 to 40 of about 152,722 (200)
Self-Similar Solution of Hot Accretion Flow with Anisotropic Pressure
Universe, 2019 For the accretion flow in extremely low-luminosity active galactic nuclei, such as our Galactic center (Sgr A*) and M 87, the collisional mean-free path of ions may be much larger than its gyroradius.
De-Fu Bu, Pei-Yao Xu, Bo-Cheng Zhu
doaj +1 more source
Evolution of Interstellar Medium, Star Formation, and Accretion at High Redshift [PDF]
, 2017 ALMA observations of the long wavelength dust continuum are used to estimate the interstellar medium (ISM) masses in a sample of 708 galaxies at z = 0.3 to 4.5 in the COSMOS field.
N. Scoville +23 more
semanticscholar +1 more source
Magellan Adaptive Optics Imaging of PDS 70: Measuring the Mass Accretion Rate of a Young Giant Planet within a Gapped Disk [PDF]
Astrophysical Journal Letters, 2018 PDS 70b is a recently discovered and directly imaged exoplanet within the wide (≳40 au) cavity around PDS 70. Ongoing accretion onto the central star suggests that accretion onto PDS 70b may also be ongoing.
K. Wagner +13 more
semanticscholar +1 more source
Universe, 2019 For systems with extremely low accretion rate, such as Galactic Center Sgr A* and M87 galaxy, the ion collisional mean free path can be considerably larger than its Larmor radius. In this case, the gas pressure is anisotropic to magnetic field lines.
Hui-Hong Deng, De-Fu Bu
doaj +1 more source
A Long-Term Study of Ultraluminous X-ray Sources in NGC 891
Universe, 2021 We perform empirical fits to the Chandra and XMM-Newton spectra of three ultraluminous X-ray sources (ULXs) in the edge-on spiral galaxy NGC 891, monitoring the region over a 17-year time window.
Nicholas M. Earley +2 more
doaj +1 more source
Super-Eddington Accretion Disks around Supermassive Black Holes [PDF]
Astrophysical Journal, 2017 We use global three-dimensional radiation magnetohydrodynamical simulations to study accretion disks onto a black hole with accretion rates varying from to . We initialize the disks with a weakly magnetized torus centered at either 50 or 80 gravitational
Yan-Fei 飞 Jiang 姜 燕 +2 more
semanticscholar +1 more source
Acclimatization Drives Differences in Reef-Building Coral Calcification Rates
Diversity, 2020 Coral reefs are susceptible to climate change, anthropogenic influence, and environmental stressors. However, corals in Kāneʻohe Bay, Hawaiʻi have repeatedly shown resilience and acclimatization to anthropogenically-induced rising temperatures and ...
Kelsey Archer Barnhill +6 more
doaj +1 more source
The Journal of Poultry Science, 2008 Growth performance, total tract nutrient retention and whole body nutrient accretion rates responses of broilers to supplementation of enzymes containing phytase or xylanase activities were investigated using 300 broilers.
Oluyinka A. Olukosi, Olayiwola Adeola
doaj +1 more source
Growth of asteroids, planetary embryos, and Kuiper belt objects by chondrule accretion [PDF]
Science Advances, 2015 Chondrules, tiny spheres found in primitive meteorites, accumulate through gas drag to form asteroids and planetary embryos. Chondrules are millimeter-sized spherules that dominate primitive meteorites (chondrites) originating from the asteroid belt. The
A. Johansen +3 more
semanticscholar +1 more source
Литосфера, 2017 General positions on plate-tectonic metallogeny are presented and the grounds for singling out the metallogenic factors of orogenic systems are given. Mobilistic paradigma corresponds to the genotype of orogens and belts which being formed at the expense
Viktor M. Necheukhin, Elena N. Volchek
doaj +1 more source