Zobrazeno 1 - 10
of 76
pro vyhledávání: '"Hyung, Siek"'
We derived position-velocity density distribution diagrams along the major (PA = 77$^{\circ}$) axis of the elliptical planetary nebula NGC 7009 with the Keck HIRES [SII] 6716/6731 \A, doublet spectral images. The average densities of the main shell a
Externí odkaz:
http://arxiv.org/abs/2212.10056
Publikováno v:
The Astrophysical Journal, 2022
We analyzed the minor axis spectra of the elliptical planetary nebula (PN) NGC 7009 observed with the Keck HIRES with a 0.862$"$ $\times$ 10$"$ slit placed at about $\sim$7.5$"$ and 10$"$ away from the center and a 0.862$"$ $\times$ 14$"$ slit at the
Externí odkaz:
http://arxiv.org/abs/2209.09052
Autor:
Hyung, Siek, Lee, Seong-Jae
We analyze high dispersion emission lines of the symbiotic nova AG Peg, observed in 1998, 2001, and 2002. The H$\alpha$ and H$\beta$ lines show three components, two narrow and one underlying broad line components, but most other lines, such as HI, H
Externí odkaz:
http://arxiv.org/abs/2002.06500
Autor:
Otsuka, Masaaki, Hyung, Siek
We performed detailed spectroscopic analyses of a young C-rich planetary nebula (PN) Jonckheere900 (J900) in order to characterise the properties of the central star and nebula. Of the derived 17 elemental abundances, we present the first determinati
Externí odkaz:
http://arxiv.org/abs/1911.01390
Autor:
Lee, Seong-Jae, Hyung, Siek
The H$\alpha$ and H$\beta$ line profiles of the symbiotic star AG Peg observed on 1998 September (phase $\phi$ = 10.24), display the top narrow double Gaussian and bottom broad (FWHM of 200 -- 400 kms$^{-1}$) components. The photo-ionization model in
Externí odkaz:
http://arxiv.org/abs/1802.00183
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 solutions. The simulation code used the Lagrangian Total Variation Diminishing
Externí odkaz:
http://arxiv.org/abs/1608.03997
We report an investigation of the extremely metal-poor and C-rich planetary nebula (PN) K648 in the globular cluster M15 using the UV to far-IR data obtained using the Subaru, HST, FUSE, Spitzer, and Herschel. We determined the nebular abundances of
Externí odkaz:
http://arxiv.org/abs/1502.03072
Autor:
Otsuka, Masaaki, Meixner, Margaret, Riebel, David, Hyung, Siek, Tajitsu, Akito, Izumiura, Hideyuki
We have estimated elemental abundances of the planetary nebula (PN) Hen2-436 in the Sagittarius (Sgr) spheroidal dwarf galaxy using ESO/VLT FORS2, Magellan/MMIRS, and Spitzer/IRS spectra. We have detected candidates of [F II] 4790A, [Kr III] 6826A, a
Externí odkaz:
http://arxiv.org/abs/1012.1251
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 8.2-m VLT/UVES archive. Chemical abundance analysis shows that the flu
Externí odkaz:
http://arxiv.org/abs/0807.0215
Publikováno v:
Mon.Not.Roy.Astron.Soc. 318 (2000) 77
We investigate the electron temperature of the inner halo and nebular core regions of NGC 6543, using archival Hubble Space Telescope (HST) Wide Field Planetary Camera 2 (WFPC2) images taken through narrow band [O III] filters. Balick et al. (2001) s
Externí odkaz:
http://arxiv.org/abs/astro-ph/0108352