K2-18b
发现[1] | |
---|---|
2015 | |
+0.0060 −0.0065 au 0.1429 21,380,000 | |
±0.08 0.20 | |
623+0.000095 −0.000100 d 32.939 | |
+0.0079° −0.0088° 89.5785° | |
+0.81 −0.59 rad ( −0.10+46.4 −33.8 °) −5.73 | |
+0.57 −0.58 m/s 3.55 | |
±0.087 R⊕ 2.610[3] | |
±1.35 M⊕ 8.63[4] | |
2.67 g/cm3 | |
≤g 1.66 | |
265 | |
K2-18b,也稱
2019
發現
[编辑]K2-18b
位置
[编辑]K2-18
物理 特性
[编辑]K2-18b
-
藝術 家 對 K2-18星 系統 的 印象 -
K2-18
行 星 系統 圖 ,顯示 了 K2-18b和 未 經 證 實 的 候 選者 K2-18c的 軌道 ,以及恆星 的 適 居 帶
行 星 大氣 層
[编辑] 哈伯 ( | |
|
這是
2020
相關 條目
[编辑]參考 資料
[编辑]- ^ 1.0 1.1 1.2 1.3 1.4 Montet, Benjamin T.; et al. Stellar and Planetary Properties of K2 Campaign 1 Candidates and Validation of 17 Planets, Including a Planet Receiving Earth-like Insolation. The Astrophysical Journal. 5 August 2015, 809 (1): 25. Bibcode:2015ApJ...809...25M. S2CID 33348734. arXiv:1503.07866 . doi:10.1088/0004-637X/809/1/25.
- ^ 2.0 2.1 Sarkis, Paula; et al. The CARMENES Search for Exoplanets around M Dwarfs: A Low-mass Planet in the Temperate Zone of the Nearby K2-18. The Astronomical Journal. 2018, 155 (6): 257. Bibcode:2018AJ....155..257S. S2CID 73533100. arXiv:1805.00830 . doi:10.3847/1538-3881/aac108.
- ^ 3.0 3.1 Benneke, Björn; Wong, Ian; Piaulet, Caroline; Knutson, Heather A.; Lothringer, Joshua; Morley, Caroline V.; Crossfield, Ian J. M.; Gao, Peter; Greene, Thomas P.; Dressing, Courtney; Dragomir, Diana. Water Vapor and Clouds on the Habitable-zone Sub-Neptune Exoplanet K2-18b. The Astrophysical Journal. December 2019, 887 (1): L14. Bibcode:2019ApJ...887L..14B. ISSN 2041-8205. S2CID 209324670. arXiv:1909.04642 . doi:10.3847/2041-8213/ab59dc (
英 语). - ^ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 Cloutier, Ryan; et al. Confirmation of the radial velocity super-Earth K2-18c with HARPS and CARMENES. Astronomy & Astrophysics. 7 January 2019, 621. A49. Bibcode:2019A&A...621A..49C. S2CID 118828975. arXiv:1810.04731 . doi:10.1051/0004-6361/201833995.
- ^ University of Cambridge. Large exoplanet could have the right conditions for life. Phys.org. 26 February 2020 [26 February 2020]. (
原始 内容 存 档于2022-10-04). - ^ Cohen, Liz. Scientists may find life on Earth-like planets covered in oceans within the next few years. CBS News. 27 August 2021 [28 August 2021]. (
原始 内容 存 档于2022-04-21). - ^ 7.0 7.1 7.2 7.3 Ghosh, Pallab. Water found for first time on 'potentially habitable' planet. BBC News. 12 September 2019 [13 September 2019]. (
原始 内容 存 档于12 September 2019). - ^ 8.0 8.1 8.2 8.3 Greshko, Michael. Water found on a potentially life-friendly alien planet. National Geographic. 11 September 2019 [11 September 2019]. (
原始 内容 存 档于11 September 2019). - ^ 9.0 9.1 9.2 9.3 9.4 Tsiaras, Angelos; et al. Water vapour in the atmosphere of the habitable-zone eight-Earth-mass planet K2-18 b. Nature Astronomy. 11 September 2019, 3 (12): 1086–1091. Bibcode:2019NatAs.tmp..451T. S2CID 202558393. arXiv:1909.05218 . doi:10.1038/s41550-019-0878-9.
- ^ NASA's Kepler Mission Announces Largest Collection of Planets Ever Discovered (
新 闻稿). NASA. 10 May 2016 [11 September 2019]. (原始 内容 存 档于6 September 2019). - ^ Foreman-Mackey, Daniel; et al. A systematic search for transiting planets in the K2 data. The Astrophysical Journal. 18 June 2015, 806 (2): 215. Bibcode:2015ApJ...806..215F. S2CID 34456803. arXiv:1502.04715 . doi:10.1088/0004-637x/806/2/215.
- ^ 12.0 12.1 12.2 12.3 12.4 Benneke, Björn; et al. Spitzer Observations Confirm and Rescue the Habitable-zone Super-earth K2-18b for Future Characterization. The Astrophysical Journal. 12 January 2017, 834 (2): 187. Bibcode:2017ApJ...834..187B. S2CID 12988198. arXiv:1610.07249 . doi:10.3847/1538-4357/834/2/187.
- ^ K2-18 -- High proper-motion Star. SIMBAD. [12 September 2019]. (
原始 内容 存 档于2019-09-22). - ^ 14.0 14.1 Wall, Mike. The Water Vapor Find on 'Habitable' Exoplanet K2-18 b Is Exciting — But It's No Earth Twin.. Space.com. 2019-09-11 [2019-09-12]. (
原始 内容 存 档于11 September 2019).Tsiaras and his colleagues published their results today (Sept. 11) in the journal Nature Astronomy. The other research team, led by Björn Benneke of the Université de Montréal, posted its paper on the online preprint site arXiv.org Tuesday. The study by Benneke et al. has not yet been peer-reviewed.
- ^ Today's Forecast for K2-18b: Cloudy with a Chance of Rain?. aasnova.org. [2020-02-03]. (
原始 内容 存 档于2022-12-06) (美国 英 语). - ^ Cloutier, R.; et al. Characterization of the K2-18 multi-planetary system with HARPS. A habitable zone super-Earth and discovery of a second, warm super-Earth on a non-coplanar orbit. Astronomy & Astrophysics. 5 December 2017, 608 (35). A35 [11 September 2019]. Bibcode:2017A&A...608A..35C. S2CID 118955175. arXiv:1707.04292 . doi:10.1051/0004-6361/201731558. (
原始 内容 存 档于12 August 2018). - ^ Grossman, Lisa. This may be the first known exoplanet with rain and clouds of water droplets. ScienceNews. 2019-09-11 [2019-09-11]. (
原始 内容 存 档于12 September 2019). - ^ Hubble Traces Subtle Signals of Water on Hazy Worlds. NASA. 3 December 2013 [4 December 2013]. (
原始 内容 存 档于6 December 2013). - ^ Deming, D.; et al. Infrared Transmission Spectroscopy of the Exoplanets HD 209458b and XO-1b Using the Wide Field Camera-3 on the Hubble Space Telescope. The Astrophysical Journal. 2013, 774 (2): 95. Bibcode:2013ApJ...774...95D. S2CID 10960488. arXiv:1302.1141 . doi:10.1088/0004-637X/774/2/95.
- ^ Mandell, A. M.; et al. Exoplanet Transit Spectroscopy Using WFC3: WASP-12 b, WASP-17 b, and WASP-19 b. The Astrophysical Journal. 2013, 779 (2): 128. Bibcode:2013ApJ...779..128M. S2CID 52997396. arXiv:1310.2949 . doi:10.1088/0004-637X/779/2/128.
- ^ Madhusudhan, Nikku; et al. The Interior and Atmosphere of the Habitable-zone Exoplanet K2-18b. The Astrophysical Journal Letters. March 2020, 891 (1). L7. Bibcode:2020ApJ...891L...7M . arXiv:2002.11115 . doi:10.3847/2041-8213/ab7229 .
- ^ Bézard, Bruno; Charnay, Benjamin; Blain, Doriann, Methane as a dominant absorber in the habitable-zone sub-Neptune K2-18 B, Nature Astronomy, 2022, 6 (5): 537–540, Bibcode:2022NatAs...6..537B, S2CID 227118701, arXiv:2011.10424 , doi:10.1038/s41550-022-01678-z
- ^ Blain, D.; Charnay, B.; Bézard, B., 1D atmospheric study of the temperate sub-Neptune K2-18b, Astronomy & Astrophysics, 2021, 646: A15, Bibcode:2021A&A...646A..15B, S2CID 227118713, arXiv:2011.10459 , doi:10.1051/0004-6361/202039072
- ^ Barclay, Thomas; Kostov, Veselin B.; Colón, Knicole D.; Quintana, Elisa V.; Schlieder, Joshua E.; Louie, Dana R.; Gilbert, Emily A.; Mullally, Susan E., Stellar Surface Inhomogeneities as a Potential Source of the Atmospheric Signal Detected in the K2-18b Transmission Spectrum, The Astronomical Journal, 2021, 162 (6): 300, Bibcode:2021AJ....162..300B, S2CID 238215555, arXiv:2109.14608 , doi:10.3847/1538-3881/ac2824
外部 連結
[编辑]- Benneke, Björn; et al. Water Vapor on the Habitable-Zone Exoplanet K2-18b. 2019. S2CID 209324670. arXiv:1909.04642 . doi:10.3847/2041-8213/ab59dc.
- K2-18 b Confirmed Planet Overview Page (页面
存 档备份,存 于互联网档案 馆), NASA Exoplanet Archive
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