Zobrazeno 1 - 10
of 14
pro vyhledávání: '"H. B. Ann"'
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 425:1567-1575
We have conducted VI CCD photometry of the two open clusters NGC 1245 and NGC 2506 using the CFH12K CCD camera. Our photometry covers a sky area of 84'X82' and 42'X81' for the two clusters, respectively, and reaches down to V = 23. We derived the phy
Autor:
Ivan K. Baldry, Stefano Zibetti, Ruth Grützbauch, Stuart I. Muldrew, Aaron S. G. Robotham, Christopher J. Conselice, Nicolas B. Cowan, Youcai Zhang, Frazer R. Pearce, Meghan E. Gray, David J. Wilman, S. V. Pilipenko, Yun-Young Choi, Sarah Brough, Ramin A. Skibba, H. B. Ann, Bret J. Podgorzec, I-hui Li, Anna Gallazzi, Changbom Park, Darren J. Croton, Xiaohu Yang
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 419:2670-2682
The influence of a galaxy's environment on its evolution has been studied and compared extensively in the literature, although differing techniques are often used to define environment. Most methods fall into two broad groups: those that use nearest
Autor:
Y.-B. Jeon, M.-Y. Chun, T. S. Yoon, H. B. Ann, Myung Gyoon Lee, K. J. Choo, Seung-Lee Kim, In-Soo Yuk, Hwankyung Sung, Byeong-Gon Park
Publikováno v:
Scopus-Elsevier
We present UBVIabsolute and V-band time-series CCD photometric results for the intermediate-age open cluster NGC 2539. From the empirical zero-age main sequence and theoretical isochrone fitting in color-color and color-magnitude diagrams, we estimat
Autor:
Sanghyuk Lee, H. B. Ann, M.-Y. Chun, In-Soo Yuk, Hwankyung Sung, Byeong-Gon Park, Seung-Lee Kim, Y.-B. Jeon, Myung Gyoon Lee
Publikováno v:
Astronomy & Astrophysics. 371:571-578
Time-series CCD photometric observations of an intermediate age open cluster NGC 2301 were per- formed to search for variable stars, particularly Dor stars and Sct stars. We also carried outUBVI photometry to study physical properties of variable sta
Autor:
H. B. Ann
Publikováno v:
Astrophysics and Space Science. 276:683-690
We have conducted UBVRI and Hα CCD photometry of five barred galaxies (NGC 2523, NGC 2950, NGC 3412, NGC 3945 and NGC 5383),along with SPH simulations, in order to understand the origin of young stellar populations in the nuclei of barred galaxies.
We studied the structure of two old open clusters, NGC 1245 and NGC 2506, from a wide and deep VI photometry data acquired using the CFH12K CCD camera at CFHT. We devised a new method for assigning cluster membership probability to individual stars u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c66c0de320f78e9c62876800a068a8ce
Autor:
H. B. Ann, K. H. Kwon
Publikováno v:
International Astronomical Union Colloquium. 157:88-90
The nuclear region of the barred galaxy NGC 4314 was observed and modeled by VIJHK photometry, long-slit spectroscopy, and SPH simulations. Young stellar populations is supposed to be made from the gas which are accumulated in the nuclear ring and/or
Autor:
H. B. Ann
We performed SPH simulations to study the nuclear morphology of a barred galaxy NGC 4314. We have constructed the mass models based on the results of a profile decomposition into disk, bulge, and bar components. Our models have three different nuclea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a1d181383aef4f66f201abb9e7a24bc
Autor:
Seung-Lee Kim, Byeong-Gon Park, Yiseul Jeon, Sungho Lee, Myung Gyoon Lee, Moo-Young Chun, H. B. Ann, In-Soo Yuk, Hyun-Il Sung
We have initiated a long-term project, the BOAO photometric survey of open clusters, to enlarge our understanding of galactic structure using UBVI CCD photometry of open clusters which have been little studied before. This is the second paper of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c9e9c10a19dcea0795c8413efb84e304
Autor:
H. B. Ann
Publikováno v:
Proceedings of the International Astronomical Union. 3:346-347
Analysis of dwarf galaxies in the local universe shows that dwarf irregular galaxies are its dominant populations and the majority of dwarf elliptical galaxies are likely to be located in the overdense regions, However, a significant fraction of blue