克卜勒32

克卜勒32（Kepler-32）是一顆光譜類型 M1V 的紅矮星，距離地球約988 ± 46光年（303 ± 14秒差距），位於天鵝座，2012年1月被克卜勒太空望遠鏡發現[1]。

概要

該恆星的質量是太陽的0.58 ± 0.05倍，直徑則是太陽的0.53 ± 0.04倍，表面溫度3900.0 K。它的質量和半徑稍大於太陽的一半，表面溫度是太陽的三分之二，光度則是太陽的5%[2]。該恆星最初確認有兩顆行星存在。其中最小的克卜勒32b軌道週期是5.90124日；另一顆克卜勒32c的周期則是8.7522日[3]。2013年4月，凌日時間變化分析確認克卜勒32另外三顆行星的存在。但是能用來確認行星最大質量的限制條件太過寬鬆而難以得到較嚴謹的質量估計值[4]。

行星系統

克卜勒32的行星系
成員
(依恆星距離) 		质量 半長軸
(AU) 		轨道周期
(天) 		離心率 傾角 半径
f — 0.013 0.742956 ~0 80.21° 0.86 R⊕
e — 0.033 2.896009 ~0 86.52° 1.11 R⊕
b — 0.05 5.90124 — — 4.1 R⊕
c — 0.09 8.7522 — — 3.7 R⊕
d — 0.129 22.780806 ~0 88.81° 2.49 R⊕

參考資料

  1. ^ NBC. 100 billion alien planets fill our galaxy: study. NBC News. [28 February 2013]. （原始内容存档于2013-04-05）. 
  2. ^ Swift, Jonathan J. CHARACTERIZING THE COOL KOIS IV: KEPLER-32 AS A PROTOTYPE FOR THE FORMATION OF COMPACT PLANETARY SYSTEMS THROUGHOUT THE GALAXY (PDF). Cornaell University Library. 2012: 2 [2013-06-14]. （原始内容存档 (PDF)于2016-07-31）. 
  3. ^ The Extrasolar Planet Encyclopedia. Kepler-32. Exoplanet.eu. [28 February 2013]. （原始内容存档于2014年2月3日）. 
  4. ^ Transit Timing Observations from Kepler: IV. Confirmation of 4 Multiple Planet Systems by Simple Physical Models: Daniel C. Fabrycky, Eric B. Ford, Jason H. Steffen, Jason F. Rowe, Joshua A. Carter, Althea V. Moorhead, Natalie M. Batalha, William J. Borucki, Steve Bryson, Lars A. Buchhave, Jessie L. Christiansen, David R. Ciardi, William D. Cochran, Michael Endl, Michael N. Fanelli, Debra Fischer, Francois Fressin, John Geary, Michael R. Haas, Jennifer R. Hall, Matthew J. Holman, Jon M. Jenkins, David G. Koch, David W. Latham, Jie Li, Jack J. Lissauer, Philip Lucas, Geoffrey W. Marcy, Tsevi Mazeh, Sean McCauliff, Samuel Quinn, Darin Ragozzine, Dimitar Sasselov, Avi Shporer. [2013-06-14]. （原始内容存档于2015-11-07）. 


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