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17 papers · 2 filters
Bias and Conditional Mass Function of Dark Halos Based on the Nonspherical Collapse Model
Lihwai Lin, Tzihong Chiueh, Jounghun Lee
Nonspherical collapse is modelled, under the Zeldovich approximation, by six-dimensional random walks of the initial deformation tensor field. The collapse boundary adopted here is…
Time-dependent correlations of inflationary perturbations
Wo-Lung Lee, Li-Zhi Fang
We show that if the primordial classical perturbations were generated by the gravitational particle creation during inflation, and followed by an evolution of quantum-to-classical…
Distorted HI Gas in the Widely Separated LIRG Arp 256
Jacqueline Chen, K. Y. Lo, Robert A. Gruendl +2
We present new interferometric HI and CO (1-0) observations of the luminous infrared source, Arp 256. Arp 256 consists of two spiral galaxies in an early stage of merging, with a p…
Heating and Ionization of X-Winds
H. Shang, A. E. Glassgold, F. H. Shu +1
In order to compare the x-wind with observations, one needs to be able to calculate its thermal and ionization properties. We formulate the physical basis for the streamline-by-str…
Abundant Molecular Gas in Tidal Dwarf Galaxies: On-going Galaxy Formation
J. Braine, P. -A. Duc, U. Lisenfeld +4
[Abridged...] We investigate the process of galaxy formation as can be observed in the only currently forming galaxies -- the so-called Tidal Dwarf Galaxies, hereafter TDGs -- thro…
Positional Coincidence between the High-latitude Steady Unidentified Gamma-ray Sources and Possibly Merging Clusters of Galaxies
Wataru Kawasaki, Tomonori Totani
We report an evidence for the first time that merging clusters of galaxies are a promising candidate for the origin of high galactic-latitude, steady unidentified EGRET gamma-ray s…