#### Filter Results:

- Full text PDF available (21)

#### Publication Year

2000

2014

- This year (0)
- Last 5 years (1)
- Last 10 years (6)

#### Publication Type

#### Co-author

#### Journals and Conferences

#### Key Phrases

Learn More

- J.-H. Woo, J. M. Baek, +4 authors J. H. An
- 2003

Emissions in East Asia for 1993 by administrative units and source types are estimated to support regional emission assessments and transport modeling studies. contribution is the highest for every species. The area sources are the most significant source type for SO x and NO x , but the fraction due to mobile source is highest for NO x. Major LPSs are… (More)

Microlensing is the only technique likely, within the next 5 years, to constrain the frequency of Jupiter-analogs. The PLANET collaboration has monitored nearly 100 microlensing events of which more than 20 have sensitivity to the perturbations that would be caused by a Jovian-mass companion to the primary lens. No clear signatures of such planets have been… (More)

- Jin H. An
- 2004

When the gravitational lensing potential can be approximated by that of a circularly symmetric system affected by weak perturbations, it is found that the shape of the resulting (tangential) caustics is entirely specified by the local azimuthal behaviour of affecting perturbations. This provides common mathematical groundwork for understanding the problems… (More)

- Jin H. An
- 2003

The lightcurve of PA-99-N2, one of the recently announced microlensing candidates towards M31, shows small deviations from the standard Paczy´nski form. We explore a number of possible explanations , including correlations with the seeing, the parallax effect and a binary lens. We find that the observations are consistent with an unresolved RGB or AGB star… (More)

- Jin H. An, M. D. Albrow
- 2002

We analyze PLANET photometric observations of the caustic-crossing binary-lens microlensing event, EROS BLG-2000-5, and find that modeling the observed light curve requires incorporation of the microlens parallax and the binary orbital motion. The projected Einstein radius (˜ r E = 3.61 ± 0.11 AU) is derived from the measurement of the microlens parallax,… (More)

- Jin H. An, N. Wyn Evans
- 2006

This paper provides a complete theoretical treatment of the point-mass lens perturbed by constant external shear, often called the Chang-Refsdal lens. We show that simple invariants exist for the products of the (complex) positions of the four images, as well as moment sums of their signed magnifications. The image topographies and equations of the caustics… (More)

- Jin H. An, N. W. Evans, P. Hewett, P. Baillon, S. Calchi Novati, B. J. Carr
- 2004

For the purposes of identifying microlensing events, the POINT-AGAPE collaboration has been monitoring the Andromeda galaxy (M31) for three seasons (1999-2001) with the Wide Field Camera on the Isaac Newton Telescope. In each season, data are taken for one hour per night for roughly sixty nights during the six months that M31 is visible. The two 33 ′ ×33 ′… (More)

- Cheongho Han, Heon-Young Chang, Jin H. An, Kyongae Chang
- 2001

In this paper, we show that the pattern of microlensing light curve anomalies induced by multiple planets are well described by the superposition of those of the single-planet systems where the individual planet-primary binary pairs act as independent lens systems. Since the outer deviation regions around the planetary caustics of the individual planets… (More)

We introduce a simple family of models for representing the dark matter in galaxies. The potential and phase space distribution function are all elementary, while the density is cusped. The models are all hypervirial, that is, the virial theorem holds locally, as well as globally. As an application to dark matter studies, we compute some of the properties… (More)

- Jin H. An
- 2001

We show that one can measure the effects of microlens parallax for binary microlensing events with three well-measured peaks – two caustic crossings plus a cusp approach, and hence derive the projected Einstein radius˜r E. Since the angular Einstein radius θ E is measurable from finite source effects for almost any well-observed caustic crossing,… (More)