366 citations
- Institute for Basic ScienceKR13 papers
- Korea Astronomy and Space Science InstituteKR13 papers
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13 papers · 1 filter
Distinguishing between Planetary and Binary Interpretations of Microlensing Central Perturbations under Severe Finite-Source Effect
Cheongho Han
In the current strategy of microlensing planet searches focusing on high-magnification events, wide and close binaries pose important sources of contamination that imitates planeta…
The sdB+M Eclipsing System HW Virginis and its Circumbinary Planets
Jae Woo Lee, Seung-Lee Kim, Chun-Hwey Kim +4
For the very short-period sdB eclipsing binary HW Vir, we present new CCD photometry made from 2000 through 2008. In order to obtain consistency of the binary parameters, our new l…
Nova-Like Cataclysmic Variable TT Ari: QPO Behaviour Coming Back From Positive Superhumps
Y. Kim, I. L. Andronov, S. M. Cha +1
We study the variability of the nova-like cataclysmic variable TT Ari, on time-scales of between minutes and months. The observations in the filter R were obtained at the 40-cm tel…
Current-Induced Resonant Motion of a Magnetic Vortex Core: Effect of Nonadiabatic Spin Torque
Jung-Hwan Moon, Dong-Hyun Kim, Myung Hwa Jung +1
The current-induced resonant excitation of a magnetic vortex core is investigated by means of analytical and micromagnetic calculations. We find that the radius and the phase shift…
Limits of Binaries That Can Be Characterized by Gravitational Microlensing
Doeon Kim, Yoon-Hyun Ryu, Byeong-Gon Park +5
Due to the high efficiency of planet detections, current microlensing planet searches focus on high-magnification events. High-magnification events are sensitive to remote binary c…
Detection of Fluorine in the Halo Planetary Nebula BoBn 1: Evidence For a Binary Progenitor Star
Masaaki Otsuka, Hideyuki Izumiura, Akito Tajitsu +1
We have found the fluorine lines [F IV] 3996.92A,4059.90A in the extremely metal-poor ([Ar/H] = -2.10+/-0.21) halo planetary nebula (PN) BoBn 1 in high-dispersion spectra from the…