Detection of a planetary system orbiting the eclipsing polar HU Aqr
ABSTRACT Using the precise times of mid‐egress of the eclipsing polar HU Aqr, we discovered that this polar is orbited by two or more giant planets. The two planets detected so far have masses of at least 5.9 and 4.5MJup. Their respective distances from the polar are 3.6 and 5.4 au with periods of 6...
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| Veröffentlicht in: | Monthly notices of the Royal Astronomical Society. Letters 2011-06, Vol.414 (1), p.L16-L20 |
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| container_title | Monthly notices of the Royal Astronomical Society. Letters |
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| creator | Qian, S.-B. Liu, L. Liao, W.-P. Li, L.-J. Zhu, L.-Y. Dai, Z.-B. He, J.-J. Zhao, E.-G. Zhang, J. Li, K. |
| description | ABSTRACT
Using the precise times of mid‐egress of the eclipsing polar HU Aqr, we discovered that this polar is orbited by two or more giant planets. The two planets detected so far have masses of at least 5.9 and 4.5MJup. Their respective distances from the polar are 3.6 and 5.4 au with periods of 6.54 and 11.96 yr, respectively. The observed rate of decrease of period derived from the downward parabolic change in the observed − calculated (O − C) curve is a factor of 15 larger than the value expected for gravitational radiation. This indicates that it may be only a part of a long‐period cyclic variation, revealing the presence of one more planet. It is interesting to note that the two detected circumbinary planets follow the Titus–Bode law of solar planets with n= 5 and 6. We estimate that another 10 yr of observations will reveal the presence of the predicted third planet. |
| doi_str_mv | 10.1111/j.1745-3933.2011.01045.x |
| format | Article |
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Using the precise times of mid‐egress of the eclipsing polar HU Aqr, we discovered that this polar is orbited by two or more giant planets. The two planets detected so far have masses of at least 5.9 and 4.5MJup. Their respective distances from the polar are 3.6 and 5.4 au with periods of 6.54 and 11.96 yr, respectively. The observed rate of decrease of period derived from the downward parabolic change in the observed − calculated (O − C) curve is a factor of 15 larger than the value expected for gravitational radiation. This indicates that it may be only a part of a long‐period cyclic variation, revealing the presence of one more planet. It is interesting to note that the two detected circumbinary planets follow the Titus–Bode law of solar planets with n= 5 and 6. We estimate that another 10 yr of observations will reveal the presence of the predicted third planet.</description><identifier>ISSN: 1745-3925</identifier><identifier>EISSN: 1745-3933</identifier><identifier>DOI: 10.1111/j.1745-3933.2011.01045.x</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Publishing Ltd</publisher><subject>binaries: close ; binaries: eclipsing ; planetary systems ; stars: individual: HU Aqr ; white dwarfs</subject><ispartof>Monthly notices of the Royal Astronomical Society. Letters, 2011-06, Vol.414 (1), p.L16-L20</ispartof><rights>2011 The Authors Monthly Notices of the Royal Astronomical Society © 2011 RAS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4345-e5589a9ac454a0e4c99b58a67879eb4ca8eced4a4895137c9ccbae716ff9c3583</citedby><cites>FETCH-LOGICAL-c4345-e5589a9ac454a0e4c99b58a67879eb4ca8eced4a4895137c9ccbae716ff9c3583</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1111%2Fj.1745-3933.2011.01045.x$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1111%2Fj.1745-3933.2011.01045.x$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,776,780,1411,27901,27902,45550,45551</link.rule.ids></links><search><creatorcontrib>Qian, S.-B.</creatorcontrib><creatorcontrib>Liu, L.</creatorcontrib><creatorcontrib>Liao, W.-P.</creatorcontrib><creatorcontrib>Li, L.-J.</creatorcontrib><creatorcontrib>Zhu, L.-Y.</creatorcontrib><creatorcontrib>Dai, Z.-B.</creatorcontrib><creatorcontrib>He, J.-J.</creatorcontrib><creatorcontrib>Zhao, E.-G.</creatorcontrib><creatorcontrib>Zhang, J.</creatorcontrib><creatorcontrib>Li, K.</creatorcontrib><title>Detection of a planetary system orbiting the eclipsing polar HU Aqr</title><title>Monthly notices of the Royal Astronomical Society. Letters</title><description>ABSTRACT
Using the precise times of mid‐egress of the eclipsing polar HU Aqr, we discovered that this polar is orbited by two or more giant planets. The two planets detected so far have masses of at least 5.9 and 4.5MJup. Their respective distances from the polar are 3.6 and 5.4 au with periods of 6.54 and 11.96 yr, respectively. The observed rate of decrease of period derived from the downward parabolic change in the observed − calculated (O − C) curve is a factor of 15 larger than the value expected for gravitational radiation. This indicates that it may be only a part of a long‐period cyclic variation, revealing the presence of one more planet. It is interesting to note that the two detected circumbinary planets follow the Titus–Bode law of solar planets with n= 5 and 6. We estimate that another 10 yr of observations will reveal the presence of the predicted third planet.</description><subject>binaries: close</subject><subject>binaries: eclipsing</subject><subject>planetary systems</subject><subject>stars: individual: HU Aqr</subject><subject>white dwarfs</subject><issn>1745-3925</issn><issn>1745-3933</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNqNkFFPwyAUhYnRxDn9D7z51AoDWngxWTbdNHPGzEXfCMVbZXZrhS5u_97Wmj3LC_eGe849fAhhSmLanKtVTFMuIqYYiweE0phQwkW8O0K9w8PxoR6IU3QWwooQlspU9tBoDDXY2pUbXObY4KowG6iN3-OwDzWscekzV7vNO64_AIMtXBXarioL4_F0iYdf_hyd5KYIcPF399Hy9uZ5NI1mj5O70XAWWc6a7SCEVEYZywU3BLhVKhPSJE0QBRm3RoKFN264VIKy1CprMwMpTfJcWSYk66PLzrfy5dcWQq3XLlgo2sjlNmipFBUJoUkzKbtJ68sQPOS68m7d_EpToltseqVbIrqlo1ts-heb3jXS60767QrY_1unH-azQVs2BlFn4Bp-u4OB8Z86SVkq9Mt8otOnBRkv7l81Yz8QUoK2</recordid><startdate>20110611</startdate><enddate>20110611</enddate><creator>Qian, S.-B.</creator><creator>Liu, L.</creator><creator>Liao, W.-P.</creator><creator>Li, L.-J.</creator><creator>Zhu, L.-Y.</creator><creator>Dai, Z.-B.</creator><creator>He, J.-J.</creator><creator>Zhao, E.-G.</creator><creator>Zhang, J.</creator><creator>Li, K.</creator><general>Blackwell Publishing Ltd</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>KL.</scope></search><sort><creationdate>20110611</creationdate><title>Detection of a planetary system orbiting the eclipsing polar HU Aqr</title><author>Qian, S.-B. ; Liu, L. ; Liao, W.-P. ; Li, L.-J. ; Zhu, L.-Y. ; Dai, Z.-B. ; He, J.-J. ; Zhao, E.-G. ; Zhang, J. ; Li, K.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4345-e5589a9ac454a0e4c99b58a67879eb4ca8eced4a4895137c9ccbae716ff9c3583</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>binaries: close</topic><topic>binaries: eclipsing</topic><topic>planetary systems</topic><topic>stars: individual: HU Aqr</topic><topic>white dwarfs</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Qian, S.-B.</creatorcontrib><creatorcontrib>Liu, L.</creatorcontrib><creatorcontrib>Liao, W.-P.</creatorcontrib><creatorcontrib>Li, L.-J.</creatorcontrib><creatorcontrib>Zhu, L.-Y.</creatorcontrib><creatorcontrib>Dai, Z.-B.</creatorcontrib><creatorcontrib>He, J.-J.</creatorcontrib><creatorcontrib>Zhao, E.-G.</creatorcontrib><creatorcontrib>Zhang, J.</creatorcontrib><creatorcontrib>Li, K.</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><jtitle>Monthly notices of the Royal Astronomical Society. Letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Qian, S.-B.</au><au>Liu, L.</au><au>Liao, W.-P.</au><au>Li, L.-J.</au><au>Zhu, L.-Y.</au><au>Dai, Z.-B.</au><au>He, J.-J.</au><au>Zhao, E.-G.</au><au>Zhang, J.</au><au>Li, K.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Detection of a planetary system orbiting the eclipsing polar HU Aqr</atitle><jtitle>Monthly notices of the Royal Astronomical Society. Letters</jtitle><date>2011-06-11</date><risdate>2011</risdate><volume>414</volume><issue>1</issue><spage>L16</spage><epage>L20</epage><pages>L16-L20</pages><issn>1745-3925</issn><eissn>1745-3933</eissn><abstract>ABSTRACT
Using the precise times of mid‐egress of the eclipsing polar HU Aqr, we discovered that this polar is orbited by two or more giant planets. The two planets detected so far have masses of at least 5.9 and 4.5MJup. Their respective distances from the polar are 3.6 and 5.4 au with periods of 6.54 and 11.96 yr, respectively. The observed rate of decrease of period derived from the downward parabolic change in the observed − calculated (O − C) curve is a factor of 15 larger than the value expected for gravitational radiation. This indicates that it may be only a part of a long‐period cyclic variation, revealing the presence of one more planet. It is interesting to note that the two detected circumbinary planets follow the Titus–Bode law of solar planets with n= 5 and 6. We estimate that another 10 yr of observations will reveal the presence of the predicted third planet.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1111/j.1745-3933.2011.01045.x</doi><tpages>5</tpages><oa>free_for_read</oa></addata></record> |
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| source | Oxford Journals Open Access Collection; Wiley Online Library Journals Frontfile Complete; Alma/SFX Local Collection |
| subjects | binaries: close binaries: eclipsing planetary systems stars: individual: HU Aqr white dwarfs |
| title | Detection of a planetary system orbiting the eclipsing polar HU Aqr |
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