| LIAO, Wen-Ping, Shengbang QIAN, Miloslav ZEJDA, Liying ZHU a Lin-Jia LI. Lunar-based Ultraviolet Telescope study of the well-known Algol-type binary TWDra. Research in Astronomy and Astrophysics. BEIJING: Science Press, 2016, roč. 16, č. 6, s. "nestrankovano", 6 s. ISSN 1674-4527. Dostupné z: https://dx.doi.org/10.1088/1674-4527/16/6/094. |
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@article{1376294,
author = {Liao, WenandPing and Qian, Shengbang and Zejda, Miloslav and Zhu, Liying and Li, LinandJia},
article_location = {BEIJING},
article_number = {6},
doi = {http://dx.doi.org/10.1088/1674-4527/16/6/094},
keywords = {stars: binaries: close; stars: binaries: eclipsing; stars: individual (TW Draco)},
language = {eng},
issn = {1674-4527},
journal = {Research in Astronomy and Astrophysics},
title = {Lunar-based Ultraviolet Telescope study of the well-known Algol-type binary TWDra},
volume = {16},
year = {2016}
}
TY - JOUR
ID - 1376294
AU - Liao, Wen-Ping - Qian, Shengbang - Zejda, Miloslav - Zhu, Liying - Li, Lin-Jia
PY - 2016
TI - Lunar-based Ultraviolet Telescope study of the well-known Algol-type binary TWDra
JF - Research in Astronomy and Astrophysics
VL - 16
IS - 6
SP - "nestrankovano"
EP - "nestrankovano"
PB - Science Press
SN - 16744527
KW - stars: binaries: close
KW - stars: binaries: eclipsing
KW - stars: individual (TW Draco)
N2 - By using the Lunar-based Ultraviolet Telescope (LUT) from 2014 December 2 to December 4, the first near-UV light curve of the well-known Algol-type binary TW Dra is reported, which is analyzed with the 2013 version of the W-D code. Our solutions confirmed that TW Dra is a semi-detached binary system where the secondary component fills its Roche lobe. The mass ratio and a high inclination are obtained (q = 0.47, i = 86.68 degrees). Based on 589 available data spanning more than one century, the complex period changes are studied. Secular increase and three cyclical changes are found in the corresponding orbital period analysis. The secular increase changes reveal mass transfer from the secondary component to the primary one at a rate of 6.8 x 10(-7) M(circle dot)yr(-1). One large cyclical change of 116.04 yr may be caused by disturbance of visual component ADS 9706B orbiting TW Dra (ADS 9706A), while the other two cyclical changes with shorter periods of 22.47 and 37.27 yr can be explained as the result of two circumbinary companions that are orbiting around TW Dra, where the two companions are in simple 3 : 5 orbit-rotation resonances. TW Dra itself is a basic binary in a possible sextuple system with the configuration (1 + 1) + (1 + 1) + (1 + 1), which further suggests that multiplicity may be a fairly common phenomenon in close binary systems.
ER -
LIAO, Wen-Ping, Shengbang QIAN, Miloslav ZEJDA, Liying ZHU a Lin-Jia LI. Lunar-based Ultraviolet Telescope study of the well-known Algol-type binary TWDra. \textit{Research in Astronomy and Astrophysics}. BEIJING: Science Press, 2016, roč.~16, č.~6, s.~''nestrankovano'', 6 s. ISSN~1674-4527. Dostupné z: https://dx.doi.org/10.1088/1674-4527/16/6/094.
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