TRAPPIST-1e

**TRAPPIST-1e**
	藝術家對2018年TRAPPIST-1e的描繪，此處描繪成為一個被潮汐鎖定的行星，其有液態海洋。這顆系外行星的實際外觀目前未知，但根據其密度，它很可能沒有完全被水覆蓋。
發現
發現者	斯皮策太空望遠鏡
發現日期	2017年2月22日
檢測方法	凌日法
軌道參數
遠拱點	0.0294322±0.000017 AU
近拱點	0.0291335±0.000017 AU
半長軸	0.02928285 ± 3.4e-07 AU
離心率	0.00510±0.00058
軌道週期	6.099043 ± 0.000015 d
軌道傾角	89.860+0.10; −0.12
物理特徵
平均半徑	0.910+0.027; −0.026 R🜨
質量	0.772+0.075; −0.079 M🜨
平均密度	5.65+0.39; −0.42 g cm−3
表面重力	0.930+0.063; −0.068 g
溫度	Teq: 246.1 ± 3.5 K（−27.05 ± 3.50 °C；−16.69 ± 6.30 °F）

TRAPPIST-1e，也稱為2MASS J23062928-0502285 e，是一顆接近地球大小的類地系外行星，在超低溫矮星 TRAPPIST-1周圍的適居帶內運行，距離地球大約40光年（12秒差距，380000萬公里，240000000百萬英里），位於寶瓶座。這顆系外行星是通過凌日法發現的，其中測量了行星穿過其恆星前方時產生的變暗效應。

它是通過斯皮策太空望遠鏡的觀測發現的圍繞這顆恆星運行的七顆新系外行星之一。^[3]^[4]在七個當中的三個（e、f和g）位於適居帶內。^[5]^[6]TRAPPIST-1e有着類似於地球的質量、半徑、密度、重力、溫度和恆星通量。^[1]^[2]它也被證實有一個緻密的大氣層，就像我們太陽系中的其他類地行星一樣。^[7]

2018年11月，研究人員確定，在多行星系統的七顆系外行星中，TRAPPIST-1e是最有可能成為類地海洋行星的一顆，也是最值得進一步研究適居性的一顆。^[8]根據適居系外行星目錄，TRAPPIST-1e是迄今為止發現的最有可能適居的系外行星之一。^[9]

參考資料[編輯]

^ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 ^1.5 ^1.6 Grimm, Simon L.; Demory, Brice-Olivier; Gillon, Michael; Dorn, Caroline; Agol, Eric; Burdanov, Artem; et al. The nature of the TRAPPIST-1 exoplanets. Astronomy and Astrophysics. 5 February 2018, 613: A68. Bibcode:2018A&A...613A..68G. S2CID 3441829. arXiv:1802.01377 . doi:10.1051/0004-6361/201732233.
^ ^2.0 ^2.1 ^2.2 Delrez, Laetitia; Gillon, Michael; Triaud, Amaury H.M.J.; Demory, Brice-Oliver; de Wit, Julien; Ingalls, James; et al. Early 2017 observations of TRAPPIST-1 with Spitzer. Monthly Notices of the Royal Astronomical Society. 9 January 2018, 475 (3): 3577. Bibcode:2018MNRAS.475.3577D. S2CID 54649681. arXiv:1801.02554 . doi:10.1093/mnras/sty051.
^ Gillon, Michaël; Triaud, Amaury H.M.J.; Demory, Brice-Olivier; Jehin, Emmanuël; Agol, Eric; Deck, Katherine M.; et al. Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1. Nature. 2017, 542 (7642): 456–460. Bibcode:2017Natur.542..456G. PMC 5330437 . PMID 28230125. arXiv:1703.01424 . doi:10.1038/nature21360.
^ Gillon, Michaël; Jehin, Emmanuël; Lederer, Susan M.; Delrez, Laetitia; de Wit, Julien; Burdanov, Artem; et al. Temperate Earth-sized planets transiting a nearby ultracool dwarf star. Nature. 2016, 533 (7602): 221–224. Bibcode:2016Natur.533..221G. PMC 5321506 . PMID 27135924. arXiv:1605.07211 . doi:10.1038/nature17448.
^ NASA telescope reveals largest batch of Earth-size, habitable-zone planets around single star (新聞稿). Exoplanet exploration: Planets beyond our Solar System. [22 February 2017]. （原始內容存檔於2019-08-05）.
^ TRAPPIST-1 Planet Lineup (新聞稿). NASA / Jet Propulsion Laboratory. 22 February 2017 [2021-12-08]. （原始內容存檔於2017-02-23）.
^ de Wit, Julien; Wakeford, Hannah R.; Lewis, Nikole K.; Delrez, Laetitia; Gillon, Michaël; Selsis, Frank; et al. Atmospheric reconnaissance of the habitable-zone Earth-sized planets orbiting TRAPPIST-1. Nature Astronomy. 2018, 2 (3): 214–219. Bibcode:2018NatAs...2..214D. S2CID 119085332. arXiv:1802.02250 . doi:10.1038/s41550-017-0374-z.
^ Study brings new climate models of small star TRAPPIST 1's seven intriguing worlds. EurekAlert!. University of Washington. 21 November 2018 [22 November 2018]. （原始內容存檔於2020-11-08）.
^ The Habitable Exoplanets Catalog. Planetary Habitability Laboratory @ UPR Arecibo (phl.upr.edu). [2019-02-06]. （原始內容存檔於2016-01-09）.

天球赤道座標： 23^h 06^m 29.283^s，−05° 02′ 28.59″

[Grimm-Demory-etal-2018-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 ^1.5 ^1.6 Grimm, Simon L.; Demory, Brice-Olivier; Gillon, Michael; Dorn, Caroline; Agol, Eric; Burdanov, Artem; et al. The nature of the TRAPPIST-1 exoplanets. Astronomy and Astrophysics. 5 February 2018, 613: A68. Bibcode:2018A&A...613A..68G. S2CID 3441829. arXiv:1802.01377 . doi:10.1051/0004-6361/201732233.

[Delrez-2018-2] 2.0 ^2.1 ^2.2 Delrez, Laetitia; Gillon, Michael; Triaud, Amaury H.M.J.; Demory, Brice-Oliver; de Wit, Julien; Ingalls, James; et al. Early 2017 observations of TRAPPIST-1 with Spitzer. Monthly Notices of the Royal Astronomical Society. 9 January 2018, 475 (3): 3577. Bibcode:2018MNRAS.475.3577D. S2CID 54649681. arXiv:1801.02554 . doi:10.1093/mnras/sty051.

[Gillon-Triaud-etal-2017-3] Gillon, Michaël; Triaud, Amaury H.M.J.; Demory, Brice-Olivier; Jehin, Emmanuël; Agol, Eric; Deck, Katherine M.; et al. Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1. Nature. 2017, 542 (7642): 456–460. Bibcode:2017Natur.542..456G. PMC 5330437 . PMID 28230125. arXiv:1703.01424 . doi:10.1038/nature21360.

[Gillon-Jehin-etal-2016-4] Gillon, Michaël; Jehin, Emmanuël; Lederer, Susan M.; Delrez, Laetitia; de Wit, Julien; Burdanov, Artem; et al. Temperate Earth-sized planets transiting a nearby ultracool dwarf star. Nature. 2016, 533 (7602): 221–224. Bibcode:2016Natur.533..221G. PMC 5321506 . PMID 27135924. arXiv:1605.07211 . doi:10.1038/nature17448.

[NASA-press-exopl-1419-5] NASA telescope reveals largest batch of Earth-size, habitable-zone planets around single star (新聞稿). Exoplanet exploration: Planets beyond our Solar System. [22 February 2017]. （原始內容存檔於2019-08-05）.

[JPL-press-21422-6] TRAPPIST-1 Planet Lineup (新聞稿). NASA / Jet Propulsion Laboratory. 22 February 2017 [2021-12-08]. （原始內容存檔於2017-02-23）.

[deWit-Wakeford-etal-2018-7] Wit, Julien; Wakeford, Hannah R.; Lewis, Nikole K.; Delrez, Laetitia; Gillon, Michaël; Selsis, Frank; et al. Atmospheric reconnaissance of the habitable-zone Earth-sized planets orbiting TRAPPIST-1. Nature Astronomy. 2018, 2 (3): 214–219. Bibcode:2018NatAs...2..214D. S2CID 119085332. arXiv:1802.02250 . doi:10.1038/s41550-017-0374-z.

[eurekalert-2018-11-21-8] Study brings new climate models of small star TRAPPIST 1's seven intriguing worlds. EurekAlert!. University of Washington. 21 November 2018 [22 November 2018]. （原始內容存檔於2020-11-08）.

[Arecibo-PHL-HabPlanCtlg-9] The Habitable Exoplanets Catalog. Planetary Habitability Laboratory @ UPR Arecibo (phl.upr.edu). [2019-02-06]. （原始內容存檔於2016-01-09）.

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