Zobrazeno 1 - 10
of 106
pro vyhledávání: '"Young-Jong Sohn"'
Publikováno v:
The Planetary Science Journal, Vol 4, Iss 3, p 49 (2023)
We report the multiband photometry of asteroids observed over 14 nights from 2015 December to 2017 December using the Korea Microlensing Telescope Network telescopes with the taxonomic classification of those objects. The data set contains the photom
Externí odkaz:
https://doaj.org/article/a5a861a9054d4095a7704bbb5bbc3b9f
Autor:
Mihwa Han, Sang-Hyun Chun, Samyaday Choudhury, Howoo Chiangamyaday Choudhury, Sowon Lee, Young-Jong Sohn
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 34, Iss 2, Pp 83-97 (2017)
We present extra-tidal features of spatial configuration of stars around three metal-poor globular clusters (NGC 6266, NGC 6273, NGC 6681) located in the Galactic bulge. The wide-field photometric data were obtained in BVI bands with the MOSAIC II
Externí odkaz:
https://doaj.org/article/6a91bd15dc6041fcbaaf7e0df4980dfe
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 28, Iss 4, Pp 273-284 (2011)
A method of stellar source selection for validating the quality of image is investigated for a low Earth orbit optical remote sensing satellite. Image performance of the optical payload needs to be validated after its launch into orbit. The stellar
Externí odkaz:
https://doaj.org/article/a960629a4c3048d1b9db71ef238c5c6c
Autor:
Jonghwan Rhee, Young-Jong Sohn
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 22, Iss 4, Pp 363-376 (2005)
To study the effects of giant population on dynamical substructures of the central region of NGC 7006, we examine the radial variations of ellipticity and position angle on BV stellar photometry using ellipse fitting technique. Total variations of el
Externí odkaz:
https://doaj.org/article/246df2e6d2ae448bbe543719e30bf247
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 21, Iss 4, Pp 249-262 (2004)
The variations of the dynamical substructures of NGC 6934 have been investigated by means of performing point spread function stellar photometry and the surface photometry on BV CCD images of NGC 6934. Our results show that overall variations of elli
Externí odkaz:
https://doaj.org/article/a46a081d3fa641c68b86d13302cd387f
Autor:
Jongwhan Rhee, Young-Jong Sohn
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 21, Iss 3, Pp 181-190 (2004)
CCD images to study the dynamical substructure of the globular cluster M5. We investigate the radial variation of ellipticities and position angles using the stellar photometry and the IRAF ellipse task. We find that out to three times the half light
Externí odkaz:
https://doaj.org/article/ffc98a7e790a49a7a20e0fc54f0ab197
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 21, Iss 1, Pp 1-10 (2004)
We present BV CCD photometry of metal-rich globular cluster M71. Based on our color-magnitude diagram (CMD), we derive the distance to M71 using a sample of Hipparcos subdwarfs of similar metallicity. Our distance modulus is (m-M)V=13.46(± 0.17). CM
Externí odkaz:
https://doaj.org/article/97800cec44b54d2096b86e35d3e49763
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 20, Iss 1, Pp 63-82 (2003)
Using the Schwarzschild's linear programming technique, we obtained the general solutions of the collisionless Bolzmann equation describing the spherical galaxy in dynamical equilibrium. From this calculation we have confirmed the existence of isotro
Externí odkaz:
https://doaj.org/article/d9c98f1b2735419691bc95956fecc6f0
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 19, Iss 1, Pp 7-18 (2002)
Interstellar cabon monoxide and its isotopes were observed with the 13.7m radio telescope of the Daeduk Radio Astronomy Observatory toward Orion Molecular Cloud-1 (OMC-1). We derive the excitation temperature, optical depth, column density, and isoto
Externí odkaz:
https://doaj.org/article/7fd6a71903a8441e9761b1678da54d84
Autor:
Young-Jong Sohn
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 19, Iss 1, Pp 19-24 (2002)
The five space density distribution D(z) with distance perpendicular to the Galactic plane were combined. The scale heights and the local densities at z = 0 of the thin disk, thick disk, and the halo components were estimated from the nonlinear least
Externí odkaz:
https://doaj.org/article/c53c5a59281b49f094925c37f50f9dd7