40 citations · 84 across the 8 of their papers we have counts for
8 papers
Simulation of advective accretion flows around black holes under various outer boundary conditions
Rajiv Kumar, Seong-Jae Lee
We simulated various accretion disc structures with viscous hydrodynamic (HD) flow around a black hole (BH). We found that the structure of the accretion disc is significantly infl…
The [S II] Spectral Images of the Planetary Nebula NGC 7009: II. Major Axis
Siek Hyung, Seong-Jae Lee, Masaaki Otsuka
We derived position-velocity density distribution diagrams along the major (PA = 77) axis of the elliptical planetary nebula NGC 7009 with the Keck HIRES [SII] 6716/6731…
Double Shells of the Planetary Nebula NGC 7009 Minor Axis
Seong-Jae Lee, Siek Hyung, Masaaki Otsuka
We analyzed the minor axis spectra of the elliptical planetary nebula (PN) NGC 7009 observed with the Keck HIRES with a 0.862 10 slit placed at about 7.5 an…
The Formation of the Double Gaussian Line Profiles of the Symbiotic Star AG Peg
Siek Hyung, Seong-Jae Lee
We analyze high dispersion emission lines of the symbiotic nova AG Peg, observed in 1998, 2001, and 2002. The H and H lines show three components, two narrow and one underlyi…
The H and H Raman-scattering line profiles of the symbiotic star AG Peg
Seong-Jae Lee, Siek Hyung
The H and H line profiles of the symbiotic star AG Peg observed on 1998 September (phase = 10.24), display the top narrow double Gaussian and bottom broad (FWHM of 200 --…
Simulations of Viscous Accretion Flow around Black Holes in Two-Dimensional Cylindrical Geometry
Seong-Jae Lee, Indranil Chattopadhyay, Rajiv Kumar +2
We simulate shock-free and shocked viscous accretion flow onto a black hole in a two dimensional cylindrical geometry, where initial conditions were chosen from analytical solution…