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9 papers · 2 filters
A Survey of Open Clusters in the u'g'r'i'z' Filter System: III. Results for the Cluster NGC 188
Bartosz Fornal, Douglas L. Tucker, J. Allyn Smith +3
We continue our series of papers describing the results of a photometric survey of open star clusters, primarily in the southern hemisphere, taken in the u'g'r'i'z' filter system.…
Cosmological Parameters from the SDSS DR5 Velocity Dispersion Function of Early-Type Galaxies through Radio-Selected Lens Statistics
Kyu-Hyun Chae
We improve strong lensing constraints on cosmological parameters in light of the new measurement of the velocity dispersion function of early-type galaxies based on the SDSS DR5 da…
Behaviour of dissipative accretion flows around black holes
Santabrata Das
We investigate the behaviour of dissipative accreting matter close to a black hole as it provides the important observational features of galactic and extra-galactic black holes ca…
Massloss from viscous advective disc
Indranil Chattopadhyay, Santabrata Das
Rotating transonic flows are long known to admit standing or oscillating shocks and that the excess thermal energy in the post shock flow drives a part of the infalling matter as b…
VI Photometry of Globular Clusters NGC6293 and NGC6541: The Formation of the Metal-Poor Inner Halo Globular Clusters
Jae-Woo Lee, Bruce W. Carney
We present VI photometry of the metal-poor inner halo globular clusters NGC6293 and NGC6541 using the planetary camera of the WFPC2 on board HST. Our color-magnitude diagrams of th…
Chemical Abundance Study of One Red Giant Star in NGC 5694 : A Globular Cluster with Dwarf Spheroidals' Chemical Signature?
Jae-Woo Lee, Mercedes Lopez-Morales, Bruce W. Carney
We report the abundance analysis of one red giant branch star in the metal-poor outer halo globular cluster NGC 5694. We obtain [Fe/H] = -1.93, based on the ionized lines, and our…