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A Critical Examination of Hypernova Remnant Candidates in M101. II. NGC 5471B
M101 kinematics and dynamics
2014/12/26
NGC 5471B has been suggested to contain a hypernova because of its extraordinarily bright X-ray emission. To assess its true nature, we have obtained high-resolution images in continuum bands and nebu...
Can Self Organized Critical Accretion Disks Generate a Log-normal Emission Variability in AGN?
Accretion accretion disks
2011/9/29
Active Galactic Nuclei (AGN), such as Seyfert galaxies, quasars, etc., show light variations in all wavelength bands, with various amplitude and in many time scales. The variations usually look errati...
EXTRATERRESTRIAL INTELLIGENCE AND DOOMSDAY：A CRITICAL ASSESSMENT OF THE NO-OUTSIDER REQUIREMENT
extraterrestrial inteligence-history and philosophy of astronomy
2009/3/12
The so-called Doomsday Argument has attracted a lot of attention
in recent years. One of the suggested ways to make this argument ineffective is
the so-called No-Outsider requirement, indicating tha...