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KELT-4Ab

KELT-4Ab
太陽系外行星 太陽系外行星列表
母恆星
母恆星 KELT-4A
星座 獅子座
赤经 (α) 10h 28m 15.011s
赤纬 (δ) +25° 34′ 23.5″
距離685 ± 33[1] ly (210 ± 10[1] pc)
光譜類型 F
軌道參數
半長軸 (a) 0.04321 ± 0.00085[2] AU
軌道離心率 (e) 0.03 ± 0.021[2]
公轉週期 (P) 2.9895933 (± 4.9e-06)[2] d
軌道傾角 (i) 83.11 ± 0.057[2]°
物理性质
质量(m)0.878 ± 0.07[2] MJ
半径(r)1.706 ± 0.085[2] RJ
發現
發現時間 2015[3]
發現者 KELT-North
發現方法 凌日法
發表論文 Published

KELT-4Ab是一顆環繞恆星系統KELT-4中的成員星KELT-4A的太陽系外行星,距離地球大約685 ly(210 pc),在天球上位於獅子座[1]。該行星是由千度極小望遠鏡巡天英语Kilodegree Extremely Little Telescope (Kilodegree Extremely Little Telescope,縮寫 KELT,暫譯)發現。

概要

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KELT-4Ab是以觀測系外行星的凌星現象時發現的,它是三合星系統KELT-4中的一顆熱木星。並且是KELT以凌日法發現的第四顆系外行星[4]。該分層系統中的KELT-4A是其中最明亮的恆星(視星等約10等),並因為在該系統中發現了熱木星,天文學家因此預期可從該系統的研究中獲得更多關於蓬鬆系外行星的知識[3][5]

恆星系統

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KELT-4是一個三合星系統。其中的KELT-4BC則是系統下的聯星次系統,並且與KELT-4A相距328 ± 16 AU(4.91×1010 ± 2.4×109 km)。而KELT-4B和KELT-4C之間的投影距離則是10.30 ± 0.74 AU(1.541×109 ± 111,000,000 km)。[3]

參見

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參考資料

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  1. ^ 1.0 1.1 1.2 Planet KELT-4A b. Open Exoplanet Catalogue. [2016-04-02]. (原始内容存档于2017-12-29). 
  2. ^ 2.0 2.1 2.2 2.3 2.4 2.5 Planet KELT-4A b. The Extrasolar Planets Encyclopaedia. [2016-04-02]. (原始内容存档于2016-04-16). 
  3. ^ 3.0 3.1 3.2 Eastman, Jason D.; et al. KELT-4Ab: An Inflated Hot Jupiter Transiting The Bright (V ~ 10) Component Of A Hiearchical Triple. The Astrophysical Journal. 2016, 151 (2) [2016-04-12]. arXiv:1510.00015可免费查阅. doi:10.3847/0004-6256/151/2/45. (原始内容存档于2019-12-28). 
  4. ^ Bob Yirka. Planet with triple-star system found. Phys.org. 1 April 2016 [3 April 2016]. (原始内容存档于2020-11-08). 
  5. ^ Nola Taylor Redd. New Alien Planet Boasts Rare Triple Suns. 31 March 2016 [2 April 2016]. (原始内容存档于2020-11-08). 

外部連結

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KELT-4Ab
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