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獅子座DP

獅子座DP
DP Leonis

藝術家筆下的獅子座DP和行星
觀測資料
曆元 J2000.0
星座 獅子座
星官
赤經 11h 17m 16.00s[1]
赤緯 +17° 57′ 41.1″[1]
視星等(V) 17.5-19[2]
特性
光谱分类DA / M5V?
变星类型XM[2]
天体测定
徑向速度 (Rv)0 km/s
距离1304 ly
(400[3] pc)
绝对星等 (MV)9.5-11
詳細資料
質量0.6/0.09 [4] M
半徑0.0114 [4]/0.12? R
亮度0.00449/0.00105? L
溫度13,500/3000? K
軌道
繞行週期 (P)0.0001708 yr
半長軸 (a)0.0027天文單位"
偏心率 (e)0.0
倾斜角 (i)79.5 [4]°
其他命名
V* DP Leo, X 11146+182[2]
參考資料庫
SIMBAD资料
系外行星資料庫英语Exoplanet Archive资料
系外行星百科资料

獅子座DPDP LeonisDP Leo)是一個距離太陽約1304光年的食聯星[4],它可能是屬於武仙座AM型的激變變星,或稱為高偏振星。這個系統由相距甚近的一顆白矮星和一顆紅矮星(兩者互繞周期約1.5小時),以及一顆系外行星組成[3]

行星系

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2010年钱声帮等人宣布在這個食聯星系中發現第三個天體,它的質量相當於行星。這第三個天體早在2002年就已有人預測其存在[4]。該天體質量至少是木星的6倍,距離聯星系約8.6天文單位。

獅子座DP的行星系[5]
成員
(依恆星距離)
质量 半長軸
(AU)
轨道周期
()
離心率 傾角 半径
b ≥6.1 ± 0.5 MJ 8.2 ± 0.4 28.0 ± 2.0 0.39 ± 0.13

參考資料

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  1. ^ 1.0 1.1 V* DP Leo -- Cataclysmic Var. AM Her type. SIMBAD. Centre de Données astronomiques de Strasbourg. [2009-12-16]. (原始内容存档于2016-03-03). 
  2. ^ 2.0 2.1 2.2 Query= DP Leo. General Catalogue of Variable Stars. Centre de Données astronomiques de Strasbourg. [2009-12-16]. (原始内容存档于2016-03-03). 
  3. ^ 3.0 3.1 Qian, S.-B.; et al. Detection of a Giant Extrasolar Planet Orbiting the Eclipsing Polar DP Leo. The Astrophysical Journal Letters. 2010, 708 (1): L66–L68. Bibcode:2010ApJ...708L..66Q. doi:10.1088/2041-8205/708/1/L66. 
  4. ^ 4.0 4.1 4.2 4.3 4.4 Schwope, A. D.; et al. A multiwavelength timing analysis of the eclipsing polar DP Leo. Astronomy and Astrophysics. 2002, 392 (2): 541–551 [2012-03-20]. Bibcode:2002A&A...392..541S. arXiv:astro-ph/0111457可免费查阅. doi:10.1051/0004-6361:20011651. (原始内容存档于2018-01-14). 
  5. ^ Beuermann, K.; et al. The giant planet orbiting the cataclysmic binary DP Leonis. Astronomy and Astrophysics. 2011, 526. Article Number A53. Bibcode:2011A&A...526A..53B. arXiv:1011.3905可免费查阅. doi:10.1051/0004-6361/201015942. 

參見

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獅子座DP
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