New Photometric Investigation of the Solar-Type Shallow-Contact Binary HH Bootis
The short-period solar-type contact binary HH Boo was monitored photometrically for about 8 years. It is found that the CCD light curves in the B, V, R, and I bands obtained in 2010 are symmetric, while the multicolor light curves observed in 2011 and 2012 by several investigators showed a positive...
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Wiley
2019-01-01
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| Series: | Advances in Astronomy |
| Online Access: | http://dx.doi.org/10.1155/2019/5641518 |
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| author | Jia-jia He Jing-jing Wang |
| author_facet | Jia-jia He Jing-jing Wang |
| author_sort | Jia-jia He |
| collection | DOAJ |
| description | The short-period solar-type contact binary HH Boo was monitored photometrically for about 8 years. It is found that the CCD light curves in the B, V, R, and I bands obtained in 2010 are symmetric, while the multicolor light curves observed in 2011 and 2012 by several investigators showed a positive O’Connell effect where the maxima following the primary minima are higher than the other ones. This indicates that the light curve of the solar-type contact binary is variable. By analyzing our multicolor light curves with the Wilson-Devinney code (W-D code), it is confirmed that HH Boo is a W-type shallow-contact binary system with a mass ratio of q = 1.703(31) and a degree of contact factor of f = 12.86%(0.73%). By including 109 new determined times of light minimum together with those compiled from the literature, it is detected that the O-C diagram shows a cyclic oscillation with a period of T3 = 6.58(11) yr and an amplitude of A3 = 0.0018(1) d. The cyclic change may reveal the presence of an extremely cool third body orbiting the central binary. |
| format | Article |
| id | doaj-art-fc75f116c8c8453a8e851ed54e53f216 |
| institution | Kabale University |
| issn | 1687-7969 1687-7977 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
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| series | Advances in Astronomy |
| spelling | doaj-art-fc75f116c8c8453a8e851ed54e53f2162025-02-03T06:07:46ZengWileyAdvances in Astronomy1687-79691687-79772019-01-01201910.1155/2019/56415185641518New Photometric Investigation of the Solar-Type Shallow-Contact Binary HH BootisJia-jia He0Jing-jing Wang1Yunnan Observatories, Chinese Academy of Sciences (CAS), P. O. Box 110, 650216 Kunming, ChinaKey Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P. O. Box 110, 650216 Kunming, ChinaThe short-period solar-type contact binary HH Boo was monitored photometrically for about 8 years. It is found that the CCD light curves in the B, V, R, and I bands obtained in 2010 are symmetric, while the multicolor light curves observed in 2011 and 2012 by several investigators showed a positive O’Connell effect where the maxima following the primary minima are higher than the other ones. This indicates that the light curve of the solar-type contact binary is variable. By analyzing our multicolor light curves with the Wilson-Devinney code (W-D code), it is confirmed that HH Boo is a W-type shallow-contact binary system with a mass ratio of q = 1.703(31) and a degree of contact factor of f = 12.86%(0.73%). By including 109 new determined times of light minimum together with those compiled from the literature, it is detected that the O-C diagram shows a cyclic oscillation with a period of T3 = 6.58(11) yr and an amplitude of A3 = 0.0018(1) d. The cyclic change may reveal the presence of an extremely cool third body orbiting the central binary.http://dx.doi.org/10.1155/2019/5641518 |
| spellingShingle | Jia-jia He Jing-jing Wang New Photometric Investigation of the Solar-Type Shallow-Contact Binary HH Bootis Advances in Astronomy |
| title | New Photometric Investigation of the Solar-Type Shallow-Contact Binary HH Bootis |
| title_full | New Photometric Investigation of the Solar-Type Shallow-Contact Binary HH Bootis |
| title_fullStr | New Photometric Investigation of the Solar-Type Shallow-Contact Binary HH Bootis |
| title_full_unstemmed | New Photometric Investigation of the Solar-Type Shallow-Contact Binary HH Bootis |
| title_short | New Photometric Investigation of the Solar-Type Shallow-Contact Binary HH Bootis |
| title_sort | new photometric investigation of the solar type shallow contact binary hh bootis |
| url | http://dx.doi.org/10.1155/2019/5641518 |
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