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6 papers · 2 filters
Gravitational Microlensing: A Tool for Detecting and Characterizing Free-Floating Planets
Cheongho Han, Sun-Ju Chung, Doeon Kim +4
Various methods have been proposed to search for extrasolar planets. Compared to the other methods, microlensing has unique applicabilities to the detections of Earth-mass and free…
Limits on the evolution of galaxies from the statistics of gravitational lenses
Kyu-Hyun Chae, Shude Mao
We use gravitational lenses from the Cosmic Lens All-Sky Survey (CLASS) to constrain the evolution of galaxies since redshift in the current $\LCDM$ cosmology. This cons…
Raman Scattered He II 6545 Line in the Symbiotic Star V1016 Cygni
Hee-Won Lee, Young-Jong Sohn, Young Woon Kang +1
We present a spectrum of the symbiotic star V1016 Cyg observed with the 3.6 m Canada-France-Hawaii Telescope, in order to illustrate a method to measure the covering factor of the…
Asymmetric Deviation of the Scattering Cross Section around Ly by Atomic Hydrogen
Hee-Won Lee
We investigate the asymmetry of the scattering cross section of radiation around Ly by atomic hydrogen, which may be applied to analyses of scattering media with high column neu…
Radial Velocity Variations in Pulsating Ap Stars. II. 33 Librae
David E. Mkrtichian, Artie P. Hatzes, Antonio Kanaan
We present precise relative radial velocity (RV) measurements for the rapidly oscillating Ap (roAp) star 33 Librae measured from high resolution data spanning the wavelength interv…
Probing the Spatial Distribution of Extrasolar Planets with Gravitational Microlensing
Cheongho Han, Young Woon Kang
Under the current microlensing planet search strategy of monitoring events caused by stellar-mass lenses, only planets located within a narrow region of separations from central st…