LP 40-365

LP 40-365

LP 40-365在1955年至1995年間的切向運動。視場範圍為8 × 8弧分。
Credit: 數位化巡天（英语：Digitized Sky Survey）
觀測資料
曆元 J2000
星座 小熊座
星官
赤經 14h 06m 35.45s[1]
赤緯 +74° 18′ 58.0″[1]
視星等（V） 15.51 ± 0.09[2]
特性
光谱分类D[2]
天体测定
徑向速度 (Rv)498[2] km/s
自行 (μ) 赤经：−56 ± 7[2] mas/yr
赤纬：148 ± 7[2] mas/yr
距离632[3] pc
绝对星等 (MV)8.14+0.60
−0.90[2]
詳細資料 [2]
質量0.14 ± 0.01 M☉
半徑0.078+0.040
−0.020 R☉
表面重力 (log g)5.80+0.20
−0.35
溫度10100+250
−350 K
自轉速度 (v sin i)30.5 ± 2.0 km/s
其他命名
2MASS J14063545+7418579[3]
參考資料庫
SIMBAD资料

LP 40-365是在小熊座的一顆低質量白矮星。它具有非常不尋常的元素組成，缺乏氫、氦或碳，並正以高速穿過銀河。它可能是在一顆未能完全摧毀其宿主恆星的次發光的Iax型超新星中產生的[2][4][5]。「LP」這個名字來源於20世紀60年代出現的Luyten-Palomar自行目錄[6]。這顆恆星在另一個目錄的名稱是「GD 492」[3]。這顆恆星被歸類為吉克拉斯天體（英语：Giclas object），亨利·李·吉克拉斯在1970年將其命名為「GD 492」[7]。

參考資料

  1. ^ 1.0 1.1 Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E.; Fowler, John W.; Gizis, John E.; Howard, Elizabeth V.; Huchra, John P.; Jarrett, Thomas H.; Kopan, Eugene L.; Kirkpatrick, J. Davy; Light, Robert M.; Marsh, Kenneth A.; McCallon, Howard L.; Schneider, Stephen E.; Stiening, Rae; Sykes, Matthew J.; Weinberg, Martin D.; Wheaton, William A.; Wheelock, Sherry L.; Zacarias, N. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). CDS/ADC Collection of Electronic Catalogues. 2003, 2246: II/246 [2024-05-17]. Bibcode:2003yCat.2246....0C. （原始内容存档于2021-04-21）. 
  2. ^ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Vennes, Stephane; Nemeth, Peter; Kawka, Adela; Thorstensen, John R.; Khalack, Viktor; Ferrario, Lilia; Alper, Erek H. An unusual white dwarf star may be a surviving remnant of a subluminous Type Ia supernova. Science. 18 August 2017, 357 (6352): 680–683. Bibcode:2017Sci...357..680V. PMID 28818942. S2CID 24141207. arXiv:1708.05568 可免费查阅. doi:10.1126/science.aam8378. 
  3. ^ 3.0 3.1 3.2 GD 492. SIMBAD. 斯特拉斯堡天文資料中心. 
  4. ^ Science Press Release. Astroserver.org. [17 August 2017]. （原始内容存档于2022-07-05）. 
  5. ^ Javier Barbuzano. The White Dwarf That Survived. Sky & Telescope. 17 August 2017 [2018-04-27]. （原始内容存档于2020-02-15）. 
  6. ^ Luyten, W. J. Proper Motion Survey with the 48 inch Schmidt Telescope. University of Minnesota. 1963–1981. 
  7. ^ Giclas, Henry L.; Burnham, Robert; Thomas, Norman Gene. A list of white dwarf suspects III : Special objects of small proper motion from the Lowell survey. Bulletin of the Lowell Observatory. 1970, 7 (153): 183. Bibcode:1970LowOB...7..183G （英语）. 

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