Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Liu, Xue Fu"'
Publikováno v:
New Astronomy. 11:287-292
The high resolution, high S/N spectra for the chromospherically active binary AR Psc (=HD 8357) has been obtained by using the Coude echelle spectrograph of the 2.16 m telescope of Beijing Astronomical Observatory. The H-alpha lines present emission
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4b8fad7d28ed89a9d8b853d1781de98f
https://doi.org/10.1016/j.newast.2005.06.001
https://doi.org/10.1016/j.newast.2005.06.001
Publikováno v:
Astrophysics and Space Science. 246:39-50
We have obtained CCD spectra for 30 chromospherically active binaries using the 2.16 m telescope at Beijing Observatory in 1995. Our purpose was to search for the presence ofHα emission which is characteristic of stars with extreme levels of chromos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09987afa4bfae112562db4c4fe4a56d3
https://doi.org/10.1007/bf00637398
https://doi.org/10.1007/bf00637398
Publikováno v:
Astrophysics and Space Science. 257:259-269
The CCD echelle spectra of the chromospherically active binary HR 5553 are obtained using the 2.16 m telescope with Coude echelle spectrograph of Beijing Observatory in April 1996. The features of Ca II H & K, Hα, He I D3 and Ca II IRT2 (λ 8542 AA)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::905ca4cde6dabdc488de94e894f6e20f
https://doi.org/10.1023/a:1001126712556
https://doi.org/10.1023/a:1001126712556
Publikováno v:
Chinese Astronomy and Astrophysics. 18:191-197
We present results of a study of high dispersion, high resolution, high S/N ratio spectra around Hα of six binaries, η And, 3 Cam, 4UMi, ν 2 Sgr, τ Sgr, HR7333, obtained with the 1-m telescope of Yunnan Observatory plus CCD. Chromospheric activit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a606d7911d14ad2b42c7a8b7718b183e
https://doi.org/10.1016/0275-1062(94)90101-5
https://doi.org/10.1016/0275-1062(94)90101-5
Autor:
Tan Hui-song, Liu Xue-fu
Publikováno v:
Astrophysics and Space Science. 183:237-244
UBV photoelectric observations of the W UMa-type binary V471 Cas were made from September to November 1984. Its colour indices were found to be(B-V)=0.m771±0.m02 and(U-B)=0.m196±0.m02. TheU, B, andV light curves of V471 Cas show some photometric fl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8eb618ef84aaa9bed91c2a7521177743
https://doi.org/10.1007/bf00637722
https://doi.org/10.1007/bf00637722
Publikováno v:
Chinese Astronomy and Astrophysics. 14:167-174
CI Aur is a short-period Algol-type eclipsing binary with a period of 1.870052 days. Photometric observations in UBV bands were made at McDonald Observatory between 1984 November and 1985 January. The light curves show random flickering and short-tim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4465f1ec447f927b1eed3bbbd0ebf2e4
https://doi.org/10.1016/0275-1062(90)90038-f
https://doi.org/10.1016/0275-1062(90)90038-f
Autor:
Zha, Yu Bing, Liu, Xue Fu, Yang, Chun Liang, Wang, Xiao Fang, Lin, Ling, Zeng, Shao Dong, Zhang, Zhen, Zhe, Yong Hui
Publikováno v:
Advanced Materials Research; August 2014, Vol. 1004 Issue: 1 p928-931, 4p
Autor:
Liu Xue-fu, Tan Hui-song
Publikováno v:
Chinese Astronomy and Astrophysics. 10:221-229
In September 1984, using the Reticon on the 2.1m telescope of McDonald Observatory, we observed the spectra in the Hα region of 33 binaries of the RS CVn type. Our observations of radial velocity and equivalent width are given here. For the first ti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ded09cba2e78128d854555fc48fe74e
https://doi.org/10.1016/0275-1062(86)90009-3
https://doi.org/10.1016/0275-1062(86)90009-3
Publikováno v:
Chinese Astronomy and Astrophysics. 5:406-412
This paper gives the results of our photometric observations of ζ Aur during its 1979/80 eclipse in 6 narrow wave bands and in the UBV colours. Useful data were obtained on 31 nights covering all phases of the eclipse. Our narrow band observations e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9f3a8b4980c4b4afa5b7f4b4efde95c4
https://doi.org/10.1016/0275-1062(81)90004-7
https://doi.org/10.1016/0275-1062(81)90004-7
Publikováno v:
Chinese Astronomy and Astrophysics. 5:479-482
Using spectrographic plates obtained on 11 nights during its 1979/1980 eclipse, we have obtained a radial velocity curve of ζ Aur. Our results are in general agreements with previous measurements, but we note that the radial velocity just before the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e12791e51d1a24e5919ee3fa221cbad5
https://doi.org/10.1016/0275-1062(81)90016-3
https://doi.org/10.1016/0275-1062(81)90016-3