19 citations · 89 across the 13 of their papers we have counts for
9 papers · 1 filter
High-Resolution Spectroscopy of Raman-scattered He II Lines in the Symbiotic Nova RR Telescopii
Jaejin Shin, Seok-Jun Chang, Hee-Won Lee +1
Raman-scattered emission features in symbiotic stars provide a powerful diagnostic of mass-loss and transfer processes, as they uniquely probe both ionized and neutral regions with…
High Resolution {\it BOES} Spectroscopy of Raman-scattered He~II6545 in Young Planetary Nebulae
Jin Lim, Seok-Jun Chang, Jaejin Shin +5
Young planetary nebulae (PNe) are characterized by their hot central stars and the presence of abundant neutral and molecular components, which result from significant mass loss du…
Twenty-Five Years of Accretion onto the Classical T Tauri Star TW Hya
Gregory J. Herczeg, Yuguang Chen, Jean-Francois Donati +39
Accretion plays a central role in the physics that governs the evolution and dispersal of protoplanetary disks. The primary goal of this paper is to analyze the stability over time…
Distribution and Kinematics of H I through Raman He II Spectroscopy of NGC 6302
Seok-Jun Chang, Hee-Won Lee, Jiyu Kim +1
The young planetary nebula NGC 6302 is known to exhibit Raman-scattered He II features at 6545 and 4851 Angstrom. These features are formed through inelastic scattering of He II$λλ…
Lyman-alpha Scattering Models Trace Accretion and Outflow Kinematics in T Tauri Systems
Nicole Arulanantham, Max Gronke, Eleonora Fiorellino +18
T Tauri stars produce broad Lyman-alpha emission lines that contribute 88% of the total UV flux incident on the inner circumstellar disks. Lyman-alpha photons are generated a…
3D Grid-Based Monte Carlo Code for Radiative Transfer through Raman and Rayleigh Scattering with Atomic Hydrogen -- STaRS
Seok-Jun Chang, Hee-Won Lee
Emission features formed through Raman scattering with atomic hydrogen provide unique and crucial information to probe the distribution and kinematics of a thick neutral region ill…
Line Formation of Raman-Scattered He II 4851 in an Expanding Spherical H I Shell in Young Planetary Nebulae
Bo-Eun Choi, Seok-Jun Chang, Ho-Gyu Lee +1
We investigate line formation of Raman-scattered He II at 4851 in an expanding neutral spherical shell that surrounds a point-like He II source located at the center. A new grid-ba…
Broad Wings around H and H in the Two S-Type Symbiotic Stars Z Andromedae and AG Draconis
Seok-Jun Chang, Hee-Won Lee, Ho-Gyu Lee +3
Symbiotic stars often exhibit broad wings around Balmer emission lines, whose origin is still controversial. We present the high resolution spectra of the S type symbiotic stars Z…
A Monte Carlo Study of Flux Ratios of Raman Scattered O~VI Features at 6825 Å and 7082 Å in Symbiotic Stars
Young-Min Lee, Dae-Sub Lee, Seok-Jun Chang +2
Symbiotic stars are regarded as wide binary systems consisting of a hot white dwarf and a mass losing giant. They exhibit unique spectral features at 6825 Å and 7082 Å, which are f…