THE K2-ESPRINT PROJECT IV. A HOT JUPITER IN A PROGRADE ORBIT WITH A POSSIBLE STELLAR COMPANION
We report on the detection and early characterization of a hot Jupiter in a three day orbit around K2-34 (EPIC 212110888), a metal-rich F-type star located in the K2 Cycle 5 field. Our follow-up campaign involves precise radial velocity (RV) measurements and high-contrast imaging using multiple faci...
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| Format: | Article |
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American Astronomical Society
2018
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| Online Access: | http://hdl.handle.net/1721.1/114499 https://orcid.org/0000-0003-1667-5427 https://orcid.org/0000-0002-4265-047X |
| _version_ | 1826197260151554048 |
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| author | Hirano, Teruyuki Nowak, Grzegorz Kuzuhara, Masayuki Palle, Enric Dai, Fei Van Eylen, Vincent Takeda, Yoichi Brandt, Timothy D. Narita, Norio Velasco, Sergio Arranz, Jorge Prieto Sanchis-Ojeda, Roberto Kudo, Tomoyuki Kusakabe, Nobuhiko Fukui, Akihiko Sato, Bun’ei Albrecht, Simon Ribas, Ignasi Ryu, Tsuguru Tamura, Motohide Yu, Liang Winn, Joshua Nathan |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Hirano, Teruyuki Nowak, Grzegorz Kuzuhara, Masayuki Palle, Enric Dai, Fei Van Eylen, Vincent Takeda, Yoichi Brandt, Timothy D. Narita, Norio Velasco, Sergio Arranz, Jorge Prieto Sanchis-Ojeda, Roberto Kudo, Tomoyuki Kusakabe, Nobuhiko Fukui, Akihiko Sato, Bun’ei Albrecht, Simon Ribas, Ignasi Ryu, Tsuguru Tamura, Motohide Yu, Liang Winn, Joshua Nathan |
| author_sort | Hirano, Teruyuki |
| collection | MIT |
| description | We report on the detection and early characterization of a hot Jupiter in a three day orbit around K2-34 (EPIC 212110888), a metal-rich F-type star located in the K2 Cycle 5 field. Our follow-up campaign involves precise radial velocity (RV) measurements and high-contrast imaging using multiple facilities. The absence of a bright nearby source in our high-contrast data suggests that the transit-like signals are not due to light variations from such a companion star. Our intensive RV measurements show that K2-34b (EPIC 212110888b) has a mass of 1.773 ± 0.086M[subscript J], confirming its status as a planet. We also detect the Rossiter–McLaughlin effect for K2-34b and show that the system has a good spin–orbit alignment (λ = -1[superscript +10][subscript -9] degrees). High-contrast images obtained by the HiCIAO camera on the Subaru 8.2 m telescope reveal a faint companion candidate (CC) (Δm[subscript H] = 6.19 ± 0.11 mag) at a separation of 0.'' 36. Follow-up observations are needed to confirm that the CC is physically associated with K2-34. K2-34b appears to be an example of a typical "hot Jupiter," albeit one which can be precisely characterized using a combination of K2 photometry and ground-based follow-up. Key words: planets and satellites: detection – stars: individual (EPIC 212110888, K2-34) techniques:
photometric – techniques: radial velocities – techniques: spectroscopic |
| first_indexed | 2024-09-23T10:45:16Z |
| format | Article |
| id | mit-1721.1/114499 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T10:45:16Z |
| publishDate | 2018 |
| publisher | American Astronomical Society |
| record_format | dspace |
| spelling | mit-1721.1/1144992022-09-27T14:45:04Z THE K2-ESPRINT PROJECT IV. A HOT JUPITER IN A PROGRADE ORBIT WITH A POSSIBLE STELLAR COMPANION Hirano, Teruyuki Nowak, Grzegorz Kuzuhara, Masayuki Palle, Enric Dai, Fei Van Eylen, Vincent Takeda, Yoichi Brandt, Timothy D. Narita, Norio Velasco, Sergio Arranz, Jorge Prieto Sanchis-Ojeda, Roberto Kudo, Tomoyuki Kusakabe, Nobuhiko Fukui, Akihiko Sato, Bun’ei Albrecht, Simon Ribas, Ignasi Ryu, Tsuguru Tamura, Motohide Yu, Liang Winn, Joshua Nathan Massachusetts Institute of Technology. Department of Physics MIT Kavli Institute for Astrophysics and Space Research Yu, Liang Winn, Joshua N. We report on the detection and early characterization of a hot Jupiter in a three day orbit around K2-34 (EPIC 212110888), a metal-rich F-type star located in the K2 Cycle 5 field. Our follow-up campaign involves precise radial velocity (RV) measurements and high-contrast imaging using multiple facilities. The absence of a bright nearby source in our high-contrast data suggests that the transit-like signals are not due to light variations from such a companion star. Our intensive RV measurements show that K2-34b (EPIC 212110888b) has a mass of 1.773 ± 0.086M[subscript J], confirming its status as a planet. We also detect the Rossiter–McLaughlin effect for K2-34b and show that the system has a good spin–orbit alignment (λ = -1[superscript +10][subscript -9] degrees). High-contrast images obtained by the HiCIAO camera on the Subaru 8.2 m telescope reveal a faint companion candidate (CC) (Δm[subscript H] = 6.19 ± 0.11 mag) at a separation of 0.'' 36. Follow-up observations are needed to confirm that the CC is physically associated with K2-34. K2-34b appears to be an example of a typical "hot Jupiter," albeit one which can be precisely characterized using a combination of K2 photometry and ground-based follow-up. Key words: planets and satellites: detection – stars: individual (EPIC 212110888, K2-34) techniques: photometric – techniques: radial velocities – techniques: spectroscopic 2018-04-03T14:41:49Z 2018-04-03T14:41:49Z 2016-06 2016-04 2018-02-16T14:36:45Z Article http://purl.org/eprint/type/JournalArticle 1538-4357 0004-637X http://hdl.handle.net/1721.1/114499 Hirano, Teruyuki, et al. “THE K2 -ESPRINT PROJECT IV. A HOT JUPITER IN A PROGRADE ORBIT WITH A POSSIBLE STELLAR COMPANION.” The Astrophysical Journal, vol. 825, no. 1, June 2016, p. 53. © 2016 The American Astronomical Society. https://orcid.org/0000-0003-1667-5427 https://orcid.org/0000-0002-4265-047X http://dx.doi.org/10.3847/0004-637X/825/1/53 The Astrophysical Journal 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 American Astronomical Society |
| spellingShingle | Hirano, Teruyuki Nowak, Grzegorz Kuzuhara, Masayuki Palle, Enric Dai, Fei Van Eylen, Vincent Takeda, Yoichi Brandt, Timothy D. Narita, Norio Velasco, Sergio Arranz, Jorge Prieto Sanchis-Ojeda, Roberto Kudo, Tomoyuki Kusakabe, Nobuhiko Fukui, Akihiko Sato, Bun’ei Albrecht, Simon Ribas, Ignasi Ryu, Tsuguru Tamura, Motohide Yu, Liang Winn, Joshua Nathan THE K2-ESPRINT PROJECT IV. A HOT JUPITER IN A PROGRADE ORBIT WITH A POSSIBLE STELLAR COMPANION |
| title | THE K2-ESPRINT PROJECT IV. A HOT JUPITER IN A PROGRADE ORBIT WITH A POSSIBLE STELLAR COMPANION |
| title_full | THE K2-ESPRINT PROJECT IV. A HOT JUPITER IN A PROGRADE ORBIT WITH A POSSIBLE STELLAR COMPANION |
| title_fullStr | THE K2-ESPRINT PROJECT IV. A HOT JUPITER IN A PROGRADE ORBIT WITH A POSSIBLE STELLAR COMPANION |
| title_full_unstemmed | THE K2-ESPRINT PROJECT IV. A HOT JUPITER IN A PROGRADE ORBIT WITH A POSSIBLE STELLAR COMPANION |
| title_short | THE K2-ESPRINT PROJECT IV. A HOT JUPITER IN A PROGRADE ORBIT WITH A POSSIBLE STELLAR COMPANION |
| title_sort | k2 esprint project iv a hot jupiter in a prograde orbit with a possible stellar companion |
| url | http://hdl.handle.net/1721.1/114499 https://orcid.org/0000-0003-1667-5427 https://orcid.org/0000-0002-4265-047X |
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