Search Publications
Search for Exoplanets around Northern Circumpolar Stars III. Long-Period Radial Velocity Variations in HD 18438 and HD 158996
Lee, Byeong-Cheol; Park, Myeong-Gu; Bang, Tae-Yang +2 more
Detecting exoplanets around giants are useful in understanding the later-stage evolution of planetary systems. We observed the M giant HD 18438 and the K giant HD 158996 as part of a Search for Exoplanets around Northern circumpolar Stars (SENS) and obtained 38 and 24 spectra from 2010 to 2017 using the high-resolution Bohyunsan Observatory Echell…
Infrared Two-Color Diagrams of AGB Stars and Planetary Nebulae Using WISE Data
Suh, Kyung-Won
We present various infrared two-color diagrams (2CDs) using WISE data for asymptotic giant branch (AGB) stars and Planetary Nebulae (PNe) and investigate possible evolutionary tracks. We use the sample of 5036 AGB stars, 660 post-AGB stars, and 2748 PNe in our Galaxy. For each object, we cross-identify the IRAS, AKARI, WISE, and 2MASS counterparts…
Properties of the SCUBA-2 850 µm Sources in the Akari NEP-Deep Field
Goto, Tomotsugu; Kim, Seong Jin; Pearson, Chris +15 more
We carry out the study of SMGs in the AKARI NEP-Deep field using James Clerk Maxwell Telescope (JCMT) SCUBA-2 850 µm source catalog released as a part of SCUBA-2 Cosmology Legacy Survey (S2CLS) program. The SCUBA-2 850 µm map has a root mean square (rms) noise of 1.2 mJy beam^{-1} and covers an area of 0.60 degree^{2}. We find 4 sub-mi…
GAIA Parallax Zero Point from RR Lyrae Stars
Kollmeier, Juna A.; Gould, Andrew
Like Hipparcos, Gaia is designed to give absolute parallaxes, independent of any astrophysical reference system. And indeed, Gaia's internal zero-point error for parallaxes is likely to be smaller than any individual parallax error. Nevertheless, due in part to mechanical issues of unknown origin, there are many astrophysical questions for which t…
Monitoring Observatinos of H2O and SiO Masers Toward Post-AGB Stars
Kim, Jaeheon; Cho, Se-Hyung; Yoon, Dong-Hwan
Optical Properties of Amorphous Alumina Dust in the Envelopes around O-Rich AGB Stars
Suh, Kyung-Won
We investigate optical properties of amorphous alumina (Al_2O_3) dust grains in the envelopes around O-rich asymptotic giant branch (AGB) stars considering the laboratory measured optical data. We derive the optical constants of amorphous alumina in a wide wavelength range that satisfy the Kramers-Kronig relation and reproduce the laboratory measu…
Optical Survey with KMTNet for Dusty Star-Forming Galaxies in the Akari Deep Field South
Kim, Seong Jin; Lee, Chung-Uk; Cha, Sang-Mok +17 more
Evolutionary Status and Internal Structure of µ Cassiopeiae
Bach, Kiehunn
A New Catalog of Silicate Carbon Stars
Suh, Kyung-Won; Kwon, Young-Joo
Astrophysics of Dusty Stellar Winds from AGB Stars
Suh, Kyung-Won