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1.
The geometrical elements of the system GH Pegasi and a slightly improved period of 2
.
d
556136 have been given. 相似文献
2.
T. D. Padalia 《Astrophysics and Space Science》1990,167(1):161-165
Twenty-seven typical binary systems have been investigated to study their power-output by gravitational radiation (P
B
) and spiralling time (0) relation. It was found that these binary systems form two distinct groups. New relations have been given betweenP
B
and 0 for each group. 相似文献
3.
UBV photometry of RS CVn-type eclipsing binary system ER Vulpeculae has been presented. The period comes out to be 0
.
d
698093. The average depths of primary and secondary minima are, respectively, 0
.
m
21 and 0
.
m
12. The colours at various phases have been given. A dip is seen around phase 0
.
p
73 as was seen in the observations of Arevaloet al. (1988). Large scatter is present in the observations as noticed earlier, and may be due to activity of the components. 相似文献
4.
S. C. Joshi J. B. Srivastava T. D. Padalia C. D. Kandpal 《Earth, Moon, and Planets》1988,40(2):217-218
Positions of comet Wilson have been measured from the photographic plates taken at the Cas-segrain focus of the 104-cm reflector of Uttar Pradesh State Observatory, Naini Tal. 相似文献
5.
T. D. Padalia 《Astrophysics and Space Science》1993,202(1):63-68
Forty-six binary systems with their primary component masses between 2M
and 3M
have been considered for gravitational radiation study. Power output by gravitational radiation (P
B
) and spiral time
0 for all individual systems have been evaluated. A relation has been given betweenP
B
and
0. The rate of decrease of orbital period (P) has also been given for 10 eccentric orbit systems. 相似文献
6.
The photoelectric elements of the system VZ Hydrae have been redetermined inU, B andV colours. Our results are at variance from those given earlier by Walker. The colour of the system has also been given. The system is a detached one. 相似文献
7.
The classical situation of dynamical systems with two degrees of freedom is completely modified by the introduction of a stochastic element which provides a slow dissolution of the zone of stability. Using a Fokker-Planck method it has been shown that the Gambler's ruin problem is a rather good approximation of the diffusion process. Furthermore the orbits exhibit aC-system character even during the diffusion process. 相似文献
8.
The absolute elements of the system XY Ceti have been obtained on the basis of the spectroscopic elements given by Popper (1971) and the photoelectric elements derived by us. The colours of the components have been obtained. Both components are found to lie fairly on the Main Sequence. The primary component of the system, however, is slightly more evolved as it shows a tendency to drift away from the Main Sequence. The spectral classes now assigned are A5V (primary) and A7V (secondary). The values of Roche constants indicate that the system is a detached one. 相似文献
9.
S. C. Joshi J. B. Srivastava C. D. Kandpal T. D. Padalia B. B. Sanwal U. S. Chaubey M. Singh 《Earth, Moon, and Planets》1987,38(3):249-252
Positions of Comet Halley have been measured from the photographic plates taken at Cassegrain focus of the 104-cm telescope of Uttar Pradesh State Observatory. 相似文献
10.
UBV photoelectric photometry of the eclipsing binary system AW UMa has been presented. A slightly improved period of 0
.
d
4387304 has been given. The colour of the system has been discussed. Eccentricity is present in the system. Light and colour curves show that intrinsic light variations may be present in the system. The presence of mass transfer is a possibility. 相似文献