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11 papers · 1 filter
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…
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…
Any multipartite entangled state violating Mermin-Klyshko inequality can be distilled for almost all bipartite splits
Soojoon Lee, Jinhyoung Lee, Jaewan Kim
We study the explicit relation between violation of Bell inequalities and bipartite distillability of multi-qubit states. It has been shown that even though for there exis…
Possible pairing states of the Fe-based superconductors
Yunkyu Bang, Han-Yong Choi
We consider the minimal two-band model for the Fe-based superconductors with a phenomenological pairing interaction which mimics short-range antiferromagnetic (AFM) fluctuations. T…
Singularities in geodesic surface congruence
Yong Seung Cho, Soon-Tae Hong
In the stringy cosmology, we investigate singularities in geodesic surface congruences for the time-like and null strings to yield the Raychaudhuri type equations possessing correc…