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WASP-39b

WASP-39b
太陽系外行星 太陽系外行星列表

天文學家在系外行星WASP-39b的大氣層中發現大量的水(想像圖)[1]
母恆星
母恆星 WASP-39[2]
星座 室女座[1]
赤经 (α) 14h 29m 18.0s[2]
赤纬 (δ) -03° 26′ 40″[2]
距離700[1] ly (230[2] pc)
光譜類型 G8[2]
軌道參數
半長軸 (a) 0.0486±0.0005[2] AU
軌道離心率 (e) 0[2]
公轉週期 (P) 4.05526[2] d
軌道傾角 (i) 87.83±0.25[2]°
物理性质
质量(m)0.28±0.03[2] MJ
半径(r)1.27±0.04[2] RJ
密度(ρ)180±40 kg m-3
發現
發現時間 2011[2]
發現者
發現方法 凌日法[2]
發現地點 WASP[2]
發表論文 已確認[2]
數據庫參考
太陽系外行星
百科全書
data
SIMBADdata

WASP-39b是一顆熱土星太陽系外行星,於2011年由超廣角尋找行星計劃發現。該行星因為在大氣層內發現大量水而聞名[1][3][4][5]。WASP-39b在天球上位於室女座,距離地球約700光年[1]

行星性質

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多顆熱木星行系外行星比較。WASP-39b為上列左起第四顆(想像圖)
從左上至右下的行星分別為:WASP-12bWASP-6b英语WASP-6bWASP-31b英语WASP-31b、WASP-39b、HD 189733 bHAT-P-12bWASP-17bWASP-19bHAT-P-1bHD 209458b.

WASP-39b的質量為木星的0.28倍,但半徑為木星的1.27倍[2]。該行星環繞母恆星WASP-39的軌道週期為4日[1]。天文學家於2018年宣布在WASP-39b的大氣層內發現高溫水分子[1]

WASP-39b也因為其極低的密度而聞名,其密度僅高於已知最低的行星WASP-17b。WASP-17b的密度為0.13±0.06 g/cm3,而WASP-39b則是稍高的0.18±0.04 g/cm3

參見

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參考資料

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  1. ^ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Cofield, Calla; Jenkins, Ann; Villard, Ray. NASA Finds a Large Amount of Water in an Exoplanet's Atmosphere. NASA. 1 March 2018 [3 March 2018]. (原始内容存档于2020-11-09). 
  2. ^ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 Planet WASP-39 b. Extrasolar Planets Encyclopaedia. 2018 [1 March 2018]. (原始内容存档于2022-11-28). 
  3. ^ H. R. Wakeford, D. K. Sing, D. Deming, et al. The Complete Transmission Spectrum of WASP-39b with a Precise Water Constraint. The Astronomical Journal. 21 December 2017, 155 (1) [1 March 2018]. (原始内容存档于2019-05-31). 
  4. ^ NASA finds a large amount of water in an exoplanet's atmosphere. Phys.org. 1 March 2018 [1 March 2018]. (原始内容存档于2022-09-02). 
  5. ^ MacDonald, Cheyenne. Saturn-sized exoplanet 700 light-years away has WATER in its atmosphere, NASA reveals. Daily Mail. 1 March 2018 [1 March 2018]. (原始内容存档于2022-06-27). 

外部連結

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维基共享资源上的相關多媒體資源:WASP-39b


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WASP-39b
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