【摘 要】
：
UV Tri was observed photometrically from 1999 to 2000 at the Xinglong Station of the National Astronomical Observatories, Chinese Academy of Sciences,and was al
【机 构】
：
National Astronomical Observatories
论文部分内容阅读
UV Tri was observed photometrically from 1999 to 2000 at the Xinglong Station of the National Astronomical Observatories, Chinese Academy of Sciences,and was also observed with StrSmgren uvbyHβ filter system at the Sierra Nevada Observatory (Spain) in 2000. From period analyses of the data, three pulsation frequencies, 9.3299 c d-1, 10.8483 c d-1 and 3.6035 c d-1 were obtained. We derived color indices: b - y = 0.215, m1 = 0.169, c1 = 0.783, andβ = 2.775. With these indices and some calibrations, we obtain: My = 2.44, Mbol = 2.27, log L/L⊙ =0.99, and log Teff= 3.875. Evolutionary sequences of stellar models with 1.00-2.00solar masses, at steps of 0.05 M⊙, are computed. Each sequence consists of 220evolutionary intervals. From a comparison between the observed and calculated physical parameters we conclude that UV Tri is in an early evolutionary phase before the turn-off point.
其他文献
The Global Rainforest Mapping (GRFM) project was initiated in 1995 and, through a dedicated data acquisition policy by the National Space Development Agency of
Phosphorite has become increasingly important as the raw material for phosphatic fertilizer. Phosphorite nodules are widespread in the Kursk complex deposit (Ru
Laser Raman spectroscopy and cathodoluminescence (CL) image reveal that zircons separated from paragneisses in the southwestern Sulu terrane (eastern China) pre
Forty-eight samples are chosen to discuss the distribution in space and time of the cooling fluctuation events during Holocene in the tropical zone of China in
Based on a cloud model and the four-dimensional variational (4DVAR) data assimilation method developed by Sun and Crook (1997), simulated experiments of dynamic
The foothill belts of Tianshan Mountains are about 280 km long and 60 km wide, and the study area extends from Kuitun city to Fukang city. They are transitional
Vertical profiles of chl-a and primary productivity in the middle continental shelf area and eddy area of the East China Sea were studied using data from a crui
The seasonal frozen soil on the Qinghai-Tibet Plateau has strong response to climate change, and its freezing-thawing process also affects East Asia climate. In
A 2-D non-uniform sediment mathmatical model in the boundary-fitting orthogonal coordinate system was developed in this paper. The governing equations, the nume