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NGC1514 Planetary Nebula
NGC1514 Planetary Nebula 高ヒット
投稿者nobuournobuour さんのメンバーフォトをもっと!   前回更新2015-2-16 6:46    
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NGC 1514 is a planetary nebula that was discovered by William Herschel on November 13, 1790, describing it "A most singular phaenomenon" and forcing him to rethink his ideas on the construction of the heavens. Up until this point Herschel was convinced that all nebulae consisted of masses of stars too remote to resolve, but now here was a single star "surrounded with a faintly luminous atmosphere." He went on to conclude "Our judgement I may venture to say, will be, that the nebulosity about the star is not of a starry nature".
It has since been conjectured that the nebula in fact envelops a tightly orbiting double star with a period of up to 10 days. Gas is presumably expanding away from the larger star of the pair.
NGC 1514 is also known as Crystal Ball Nebula.
ルボシュ・コホーテク(Luboš Kohoutek、1935年1月29日 - )はチェコの天文学者。多くの彗星、小惑星を発見した。
モラヴィアのZábřehに生まれた。ブルノとプラハの大学で物理学と天文学を学んだ後、チェコスロバキア科学アカデミーの天文学研究所で働いた。1967年にルボシュ・ペレクと1036の惑星状星雲を収録したカタログを出版した。ドイツのハンブルク天文台で働き、1968年のチェコ事件が起こると、ドイツに留まることを決めた。1970年代にコホーテク彗星 (C/1973 E1)などの発見で有名になった。その後スペインやチリの天文台で惑星状星雲の観測を行い、2001年に引退した。
多くの彗星の発見が最も有名である。大彗星になると期待されたコホーテク彗星 (C/1973 E1)のほか発見した彗星には、周期彗星の75P/コホーテク彗星 (75P)、76P/ウェスト・コホーテク・池村彗星がある。
またアポロ群の(1865) Cerberusを含む75の小惑星を発見した。

Title: A study of planetary nebula NGC 1514. I. The double-star hypothesis for the planetary nucleus based on photoelectric photometry
Authors: Kohoutek, L.
Journal: Bulletin of the Astronomical Institute of Czechoslovakia, vol. 18, p.103
Bibliographic Code: 1967BAICz..18..103K

Title: A study of planetary nebula NGC 1514. II. Spectroscopic investigation of the central star
Authors: Kohoutek, L. & Hekela, J.
Journal: Bulletin of the Astronomical Institute of Czechoslovakia, vol. 18, p.203

A study of planetary nebula NGC 1514. III. Isophotic contours and the spatial model of the nebula
Kohoutek, L.
Bulletin of the Astronomical Institute of Czechoslovakia, vol. 19, p.285

Michael E. Ressler1, Martin Cohen2, Stefanie Wachter3, D. W. Hoard3, Amy K. Mainzer1, and Edward L. Wright4
1 Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA;
2 Monterey Institute for Research in Astronomy, 200 8th Street, Marina, CA 93933, USA
3 Spitzer Science Center, California Institute of Technology, 1200 E California Blvd, Pasadena, CA 91125, USA
4 UCLA Astronomy, P.O. Box 951547, Los Angeles, CA 90095, USA
Received 2010 August 13; accepted 2010 September 20; published 2010 November 9
We report the discovery of a pair of infrared, axisymmetric rings in the planetary nebula NGC 1514 during the
course of theWISE all-sky mid-infrared survey. Similar structures are seen at visible wavelengths in objects such as
the “Engraved Hourglass Nebula” (MyCn 18) and the “Southern Crab Nebula” (Hen 2-104). However, in NGC 1514
we see only a single pair of rings and they are easily observed only in the mid-infrared. These rings are roughly
0.2 pc in diameter, are separated by 0.05 pc, and are dominated by dust emission with a characteristic temperature of
160 K.We compare the morphology and color of the rings to the other nebular structures seen at visible, far-infrared,
and radio wavelengths, and close with a discussion of a physical model and formation scenario for NGC 1514.
Key words: infrared: stars – planetary nebulae: individual (NGC 1514) – surveys

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