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A Comparison of the Intrinsic Shapes of Two Different Types of Dwarf Galaxies: Blues Compact Dwarfs and Dwarf Ellipticals
Eon-Chang Sung, Cheongho Han, Barbara +3
We measure the apparent shapes for a sample of 62 blue compact dwarf galaxies (BCDs), and compare them with the apparent shapes for a sample of 80 dwarf elliptical galaxies (dEs).…
The Effect of Luminous Lens Blending in Gravitational Microlensing Experiments
Seunghun Lee, Cheongho Han
The most important uncertainty in the results of gravitational microlensing experiments comes from the difficulties of photometry caused by blending of source stars. Recently Nemir…
Inventory of Gravitational Microlenses toward the Galactic Bulge
Cheongho Han, Seunghun Lee
We determine the microlensing event rate distribution, , that is properly normalized by the first year MACHO group observations (Alcock et al. 1997). By comparing the det…
Correction for Blending Problem in Gravitational Microlensing Events by Using Hubble Space Telescope
Cheongho Han
The biggest uncertainty in determining microlensing parameters comes from the blending of source star images because the current experiments are being carried out toward very dense…