WASP-47: A HOT JUPITER SYSTEM WITH TWO ADDITIONAL PLANETS DISCOVERED BY K2
Using new data from the K2 mission, we show that WASP-47, a previously known hot Jupiter host, also hosts two additional transiting planets: a Neptune-sized outer planet and a super-Earth inner companion. We measure planetary properties from the K2 light curve and detect transit timing variations (T...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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IOP Publishing
2016
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| Online Access: | http://hdl.handle.net/1721.1/100813 https://orcid.org/0000-0003-3182-5569 |
| _version_ | 1826208493944700928 |
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| author | Becker, Juliette C. Vanderburg, Andrew Adams, Fred C. Schwengeler, Hans Martin Rappaport, Saul A |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Becker, Juliette C. Vanderburg, Andrew Adams, Fred C. Schwengeler, Hans Martin Rappaport, Saul A |
| author_sort | Becker, Juliette C. |
| collection | MIT |
| description | Using new data from the K2 mission, we show that WASP-47, a previously known hot Jupiter host, also hosts two additional transiting planets: a Neptune-sized outer planet and a super-Earth inner companion. We measure planetary properties from the K2 light curve and detect transit timing variations (TTVs), confirming the planetary nature of the outer planet. We performed a large number of numerical simulations to study the dynamical stability of the system and to find the theoretically expected TTVs. The theoretically predicted TTVs are in good agreement with those observed, and we use the TTVs to determine the masses of two planets, and place a limit on the third. The WASP-47 planetary system is important because companion planets can both be inferred by TTVs and are also detected directly through transit observations. The depth of the hot Jupiter's transits make ground-based TTV measurements possible, and the brightness of the host star makes it amenable for precise radial velocity measurements. The system serves as a Rosetta Stone for understanding TTVs as a planet detection technique. |
| first_indexed | 2024-09-23T14:06:32Z |
| format | Article |
| id | mit-1721.1/100813 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:06:32Z |
| publishDate | 2016 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/1008132022-10-01T19:15:43Z WASP-47: A HOT JUPITER SYSTEM WITH TWO ADDITIONAL PLANETS DISCOVERED BY K2 Becker, Juliette C. Vanderburg, Andrew Adams, Fred C. Schwengeler, Hans Martin Rappaport, Saul A Massachusetts Institute of Technology. Department of Physics MIT Kavli Institute for Astrophysics and Space Research Rappaport, Saul A. Using new data from the K2 mission, we show that WASP-47, a previously known hot Jupiter host, also hosts two additional transiting planets: a Neptune-sized outer planet and a super-Earth inner companion. We measure planetary properties from the K2 light curve and detect transit timing variations (TTVs), confirming the planetary nature of the outer planet. We performed a large number of numerical simulations to study the dynamical stability of the system and to find the theoretically expected TTVs. The theoretically predicted TTVs are in good agreement with those observed, and we use the TTVs to determine the masses of two planets, and place a limit on the third. The WASP-47 planetary system is important because companion planets can both be inferred by TTVs and are also detected directly through transit observations. The depth of the hot Jupiter's transits make ground-based TTV measurements possible, and the brightness of the host star makes it amenable for precise radial velocity measurements. The system serves as a Rosetta Stone for understanding TTVs as a planet detection technique. 2016-01-13T18:03:16Z 2016-01-13T18:03:16Z 2015-10 2015-08 Article http://purl.org/eprint/type/JournalArticle 2041-8213 2041-8205 http://hdl.handle.net/1721.1/100813 Becker, Juliette C., Andrew Vanderburg, Fred C. Adams, Saul A. Rappaport, and Hans Martin Schwengeler. “WASP-47: A HOT JUPITER SYSTEM WITH TWO ADDITIONAL PLANETS DISCOVERED BY K2.” The Astrophysical Journal 812, no. 2 (October 12, 2015): L18. © 2015 IOP Publishing https://orcid.org/0000-0003-3182-5569 en_US http://dx.doi.org/10.1088/2041-8205/812/2/L18 The Astrophysical Journal. Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf IOP Publishing IOP Publishing |
| spellingShingle | Becker, Juliette C. Vanderburg, Andrew Adams, Fred C. Schwengeler, Hans Martin Rappaport, Saul A WASP-47: A HOT JUPITER SYSTEM WITH TWO ADDITIONAL PLANETS DISCOVERED BY K2 |
| title | WASP-47: A HOT JUPITER SYSTEM WITH TWO ADDITIONAL PLANETS DISCOVERED BY K2 |
| title_full | WASP-47: A HOT JUPITER SYSTEM WITH TWO ADDITIONAL PLANETS DISCOVERED BY K2 |
| title_fullStr | WASP-47: A HOT JUPITER SYSTEM WITH TWO ADDITIONAL PLANETS DISCOVERED BY K2 |
| title_full_unstemmed | WASP-47: A HOT JUPITER SYSTEM WITH TWO ADDITIONAL PLANETS DISCOVERED BY K2 |
| title_short | WASP-47: A HOT JUPITER SYSTEM WITH TWO ADDITIONAL PLANETS DISCOVERED BY K2 |
| title_sort | wasp 47 a hot jupiter system with two additional planets discovered by k2 |
| url | http://hdl.handle.net/1721.1/100813 https://orcid.org/0000-0003-3182-5569 |
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