Photometric observations of the binary system V350 Lacertae

1992 ◽  
Vol 188 (1) ◽  
pp. 151-158
Author(s):  
O. Demircan ◽  
E. Derman ◽  
G. Kahraman
Keyword(s):  
Binary System ◽  
Photometric Observations

scholarly journals The Symbiotic Binary System AG Pegasi

1980 ◽  
Vol 88 ◽  
pp. 535-542 ◽  
Author(s):  
Charles D. Keyes ◽  
Mirek J. Plavec
Keyword(s):  
Binary System ◽  
Emission Lines ◽  
Complete Coverage ◽  
Cool Component ◽  
Relative Contribution ◽  
Photometric Observations

A complete coverage of the spectrum of AG Peg has been obtained between wavelengths 1200 − 7000 A by us, and can be supplemented by IR photometric observations by others. Our IUE observations yield a lower value of E(B-V), about 0.12. The two stellar components are easily recognized, but their characteristics are still rather uncertain.The cool component may be a normal M1.7 III giant, but the temperature and luminosity of the hot star remain largely indeterminate. Firstly, there are no good models for a hot subdwarf, and secondly, it is difficult to determine the relative contribution of the star itself and the surrounding hydrogen cloud.The emission lines observed in the UV have double or triple structure, indicating two or three distinct emitting regions.

scholarly journals PHOTOMETRIC OBSERVATIONS OF THE CONTACT BINARY SYSTEM V523 CASSIOPEIAE

2006 ◽  
Vol 23 (3) ◽  
pp. 177-188 ◽  
Author(s):  
Jang-Hae Jeong ◽  
Chun-Hwey Kim ◽  
Yong-Sam Lee
Keyword(s):  
Binary System ◽  
Photometric Observations ◽  
Contact Binary

scholarly journals The Symbiotic Binary System EG Andromedae

1987 ◽  
Vol 93 ◽  
pp. 755-758
Author(s):  
D. Chochol ◽  
A. Skopal ◽  
A. Vittone ◽  
A. Mammano
Keyword(s):  
Binary System ◽  
Symbiotic Star ◽  
Line Profiles ◽  
Primary Minimum ◽  
Photometric Observations ◽  
New Period ◽  
Balmer Lines ◽  
The New Period

AbstractPhotometric observations of the symbiotic star EG and confirm that the binary system is eclipsing. The epoch of primary minimum is computed. The new period 474 days instead of 470 days is estimated by a comparison of line profiles of Balmer lines taken in 1967–69 and 1982–84. The new ephemeris is

Photometric observations and analysis of the close binary system DV Aquarii

1985 ◽  
Vol 97 ◽  
pp. 62 ◽  
Author(s):  
A. Okazaki ◽  
A. Yamasaki ◽  
C. Nurwendaya ◽  
H. L. Malasan
Keyword(s):  
Binary System ◽  
Close Binary System ◽  
Close Binary ◽  
Photometric Observations

scholarly journals Infrared observations and mass loss of the binary system V861 Sco

1981 ◽  
Vol 59 ◽  
pp. 477-480 ◽  
Author(s):  
E.G. Tanzi ◽  
L. Maraschi ◽  
M. Tarenghi ◽  
A. Treves
Keyword(s):  
Binary System ◽  
Mass Loss ◽  
Mass Flow ◽  
Secondary Component ◽  
Single Line ◽  
Infrared Excess ◽  
Infrared Observations ◽  
X Ray ◽  
Photometric Observations ◽  
Ultraviolet Observations

V 861 Sco (HD 152667) is a well known single line binary(1,2).The proposed association with a variable X-ray source(3,4) has triggered renewed interest in the system. Recent optical, infrared and ultraviolet observations(5 - 12) have provided a better knowledge of its characteristics. A first estimate of the mass loss was given by Hutchings(13).Here we report on a series of photometric observations in the infrared (from 1.25 to 4.8 µ) taken at various orbital phases which improve and extend previous measurements by Tanzi et al.(12)The results give evidence of a phase modulated infrared excess which can be interpreted in terms of a non isotropic mass flow in the system or, alternately, of a contribution from a colder secondary component.

scholarly journals New Photometric Observations of RS Oph

2011 ◽  
Vol 7 (S281) ◽  
pp. 201-202
Author(s):  
Irina Voloshina ◽  
Vladimir Metlov
Keyword(s):  
Binary System ◽  
White Dwarf ◽  
Astronomical Institute ◽  
Long Period ◽  
Photometric Observations ◽  
Sternberg Astronomical Institute ◽  
Recurrent Nova ◽  
Type Giant ◽  
Chandrasekhar Limit

AbstractThe recurrent nova RS Oph is a long period (~455 days) binary system consisting of a hot white dwarf with mass close to the Chandrasekhar limit and an M-type giant secondary. Here we present the results of photometric observations of this nova which were made during recent years with the telescopes of the Sternberg Astronomical Institute in Crimea.

scholarly journals New Clues on the Model of YY Her After Two Seasons

2004 ◽  
Vol 194 ◽  
pp. 222-222
Author(s):  
L. Hric ◽  
R. Gális ◽  
A. Dobrotka ◽  
V. Śimon ◽  
K. Petrík ◽  
...  
Keyword(s):  
Binary System ◽  
Line Emission ◽  
Photometric Data ◽  
Secondary Minimum ◽  
Photometric Observations ◽  
Symbiotic Binaries ◽  
Light Variability

During two observational seasons of international campaign of YY Her we secured photometric data which covered the primary as well as the secondary minima and revealed unexpected outburst activity of this system.YY Her belongs to the classical symbiotic binaries with nova-like outbursts. Recently Mikolajewska et al. (2002) explained the light variability of YY Her by combining the ellipsoidal changes and sinusoidal variations of the nebular continuum and line emission. In 2001 (Hric et al. 2001) we discovered in the binary system YY Her the presence of the secondary minimum that was indicated, however, by only three photometric observations from one observatory.

Definition and analysis of the fundamental parameters of a close binary system Konkoly J064029.1+ 385652.2

2021 ◽  
pp. 123-130
Author(s):  
D. N. NURTDINOVA ◽  
V. V. SHIMANSKY ◽  
N. V. BORISOV ◽  
E. N. IRTUGANOV
Keyword(s):  
Binary System ◽  
Cataclysmic Variables ◽  
Close Binary System ◽  
Close Binary ◽  
Fundamental Parameters ◽  
Photometric Observations

In this work, we studied spectroscopic and photometric observations of the close binary system Konkoly J064029.1+385652.2, which is a candidate for young pre-cataclysmic variables with an sdO subdwarf. Observations were obtained in 2017-19 on the Large Azimuth Telescope SAO and the Russian-Turkish RTT-150 telescope.

scholarly journals PHOTOMETRIC OBSERVATIONS OF THE CONTACT BINARY SYSTEM CC COM

2007 ◽  
Vol 24 (2) ◽  
pp. 99-110
Author(s):  
Jang-Hae Jeong ◽  
Chun-Hwey Kim ◽  
Yong-Gi Kim
Keyword(s):  
Binary System ◽  
Photometric Observations ◽  
Contact Binary
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