An ultra-short-period super-Earth with an extremely high density and an outer companion
We present the discovery and characterization of a new multi-planetary system around the Sun-like star K2-360 (EPIC 201595106). K2-360 was first identified in K2 photometry as the host of an ultra-short-period (USP) planet candidate with a period of 0.88 d. We obtained follow-up transit photometry,...
| Autori principali: | , , , , , , , , , , , , , , , , , , , , |
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| Natura: | Journal article |
| Lingua: | English |
| Pubblicazione: |
Nature Research
2024
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| _version_ | 1826315171685990400 |
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| author | Livingston, JH Gandolfi, D Trani, AA Herath, M Barragán, O Hatzes, A Luque, R Fukui, A Nowak, G Palle, E Hellier, C Fridlund, M de Leon, J Hirano, T Narita, N Albrecht, S Dai, F Deeg, H Van Eylen, V Korth, J Tamura, M |
| author_facet | Livingston, JH Gandolfi, D Trani, AA Herath, M Barragán, O Hatzes, A Luque, R Fukui, A Nowak, G Palle, E Hellier, C Fridlund, M de Leon, J Hirano, T Narita, N Albrecht, S Dai, F Deeg, H Van Eylen, V Korth, J Tamura, M |
| author_sort | Livingston, JH |
| collection | OXFORD |
| description | We present the discovery and characterization of a new multi-planetary system around the Sun-like star K2-360 (EPIC 201595106). K2-360 was first identified in K2 photometry as the host of an ultra-short-period (USP) planet candidate with a period of 0.88 d. We obtained follow-up transit photometry, confirming the star as the host of the signal. High precision radial velocity measurements from HARPS and HARPS-N confirm the transiting USP planet and reveal the existence of an outer (non-transiting) planet with an orbital period of ∼10 d. We measure a mass of 7.67±0.75 M⊕ and a radius of 1.57±0.08 R⊕ for the transiting planet, yielding a high mean density of 11±2 g cm-3, making it the densest well-characterized USP super-Earth discovered to date. We measure a minimum mass of 15.2±1.8 M⊕ for the outer planet, and explore a migration formation pathway via the von Zeipel–Kozai–Lidov (ZKL) mechanism and tidal dissipation. |
| first_indexed | 2024-12-09T03:20:47Z |
| format | Journal article |
| id | oxford-uuid:d017d87f-fe0f-4dee-a3d1-afc5796ed3e3 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-12-09T03:20:47Z |
| publishDate | 2024 |
| publisher | Nature Research |
| record_format | dspace |
| spelling | oxford-uuid:d017d87f-fe0f-4dee-a3d1-afc5796ed3e32024-11-08T20:12:03ZAn ultra-short-period super-Earth with an extremely high density and an outer companionJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:d017d87f-fe0f-4dee-a3d1-afc5796ed3e3EnglishJisc Publications RouterNature Research2024Livingston, JHGandolfi, DTrani, AAHerath, MBarragán, OHatzes, ALuque, RFukui, ANowak, GPalle, EHellier, CFridlund, Mde Leon, JHirano, TNarita, NAlbrecht, SDai, FDeeg, HVan Eylen, VKorth, JTamura, MWe present the discovery and characterization of a new multi-planetary system around the Sun-like star K2-360 (EPIC 201595106). K2-360 was first identified in K2 photometry as the host of an ultra-short-period (USP) planet candidate with a period of 0.88 d. We obtained follow-up transit photometry, confirming the star as the host of the signal. High precision radial velocity measurements from HARPS and HARPS-N confirm the transiting USP planet and reveal the existence of an outer (non-transiting) planet with an orbital period of ∼10 d. We measure a mass of 7.67±0.75 M⊕ and a radius of 1.57±0.08 R⊕ for the transiting planet, yielding a high mean density of 11±2 g cm-3, making it the densest well-characterized USP super-Earth discovered to date. We measure a minimum mass of 15.2±1.8 M⊕ for the outer planet, and explore a migration formation pathway via the von Zeipel–Kozai–Lidov (ZKL) mechanism and tidal dissipation. |
| spellingShingle | Livingston, JH Gandolfi, D Trani, AA Herath, M Barragán, O Hatzes, A Luque, R Fukui, A Nowak, G Palle, E Hellier, C Fridlund, M de Leon, J Hirano, T Narita, N Albrecht, S Dai, F Deeg, H Van Eylen, V Korth, J Tamura, M An ultra-short-period super-Earth with an extremely high density and an outer companion |
| title | An ultra-short-period super-Earth with an extremely high density and an outer companion |
| title_full | An ultra-short-period super-Earth with an extremely high density and an outer companion |
| title_fullStr | An ultra-short-period super-Earth with an extremely high density and an outer companion |
| title_full_unstemmed | An ultra-short-period super-Earth with an extremely high density and an outer companion |
| title_short | An ultra-short-period super-Earth with an extremely high density and an outer companion |
| title_sort | ultra short period super earth with an extremely high density and an outer companion |
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