Zobrazeno 1 - 10
of 69
pro vyhledávání: '"F.-Z. Cheng"'
Autor:
Xin Xue, M Muenzel, Lisheng Jiang, A Fazakas, Shaofeng Guan, J Illnitzky, F Z Cheng, E Duenninger, J T Yu, T Keil
Publikováno v:
European Heart Journal. 39
Publikováno v:
Proceedings of the International Astronomical Union. 11
Star-formation regions in nearby galaxies provide an excellent laboratory to study star formation processes, evolution of massive stars and the properties of the surrounding interstellar medium. A wealth of information can be obtained from their spec
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 368:37-47
(abridged) We present measurements of the pairwise velocity dispersion (PVD) for different classes of galaxies in the Sloan Digital Sky Survey. For a sample of about 200,000 galaxies, we study the dependence of the PVD on galaxy properties such as lu
Publikováno v:
Astronomy & Astrophysics. 403:877-887
This is the third paper of a series dedicated to the study of the star formation rates, star formation histories, metallicities and dust contents of a sample of blue compact galaxies (BCGs). We constrain the stellar contents of 73 blue compact galaxi
Publikováno v:
Chinese Astronomy and Astrophysics. 27:28-36
We have carried out long-slit spectral observations of NGC5018 in the range λλ3600 – 7500 A using the BAO 2.16 m telescope. By means of a population synthesis based on a star cluster spectral sample, we have studied the galaxy's interior stellar
Publikováno v:
Chinese Astronomy and Astrophysics. 26:432-441
Using principal component analysis, we have studied the equivalent widths of optical spectral lines of 41 Galactic globular clusters and 22 young stellar clusters. We have discovered that some characteristic spectral lines, such as the CN, Ca IIK, Ca
Publikováno v:
Chinese Astronomy and Astrophysics. 24:36-48
In order to study the history of star formation, energy source and internal dust distribution in blue compact dwarf galaxies (BCDGs), we have compared the observed spectra of the nuclei of 7 BCDGs with the predictions of stellar population synthesis
Autor:
M. A. Malkan, S. J. Xue, M. Dietrich, R. Vio, P. M. Rodríguez-Pascual, T. J. Turner, Danielle Alloin, Hong Wu, David Marlow, F. Z. Cheng, Wei-Hsin Sun, Z. L. Zou, C. M. Gaskell, Wolfram Kollatschny, Willem Wamsteker, J. M. Rodríguez Espinosa, Luis C. Ho, Shai Kaspi, Peter G. Martin, N. G. Bochkarev, Gordon M. MacAlpine, Gail A. Reichert, B. C. Qian, Julian H. Krolik, Simon L. Morris, Karen M. Leighly, M. C. Recondo-Gonzalez, J. Clavel, Alla I. Shapovalova, Stephan Wagner, Ian M. George, Alexei V. Filippenko, Hagai Netzer, Keith Horne, M. R. Goad, K. A. Wills, K. S. J. Anderson, Kirk T. Korista, Gerard A. Kriss, J. M. Shull, Richard W. Pogge, D. M. Crenshaw, G. M. Stirpe, Maria Santos-Lleo, P. T. O'Brien, Bradley M. Peterson, Ignaz Wanders
Publikováno v:
The Astrophysical Journal. 509:163-176
As part of an extensive multiwavelength monitoring campaign, the International Ultraviolet Explorer satellite was used to observe the broad-line radio galaxy 3C 390.3 during the period 1994 December 31-1996 March 5. Spectra were obtained every 6-10 d
Autor:
Xu Kong, F. Z. Cheng
Publikováno v:
Chinese Astronomy and Astrophysics. 22:145-154
The method of population synthesis based on a grid of spectra of star clusters of different ages and metallicities is applied to four BCGs. Our results indicate that the BCGs are old galaxies in which star formation occurs in short spurts separated b
Publikováno v:
Chinese Astronomy and Astrophysics. 20:161-168
We summarize the study of the bolometric evolution of SN 1987 A over the past six years. Over the first 800 days after the explosion, the observed bolometric curve agrees well with the model of heating by radioactive decay of radioactive elements syn