AM Herculis

AM Herculis

AM Herculis is the prototype for a category of cataclysmic variable stars called polars, or AM Herculis stars. It is located in the constellation Hercules, and was discovered in 1923 by Max Wolf in Heidelberg, Germany and was then listed in the General Catalogue of Variable Stars as an irregular variable which ranged from 12th to 14th magnitude. In 1976, the astronomer S. Tapia discovered that light from the star is both linearly and circularly polarized , showing that there was a strong magnetic field surrounding the system and revealing that the system was more complex than previously thought.

External links

* [http://www.aavso.org/vstar/vsots/0601.shtml Variable Star Of The Month] by the American Association of Variable Star Observers


Wikimedia Foundation. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • HERCULIS Columnae — locus Frisiae citer. in Groeningarm, et Covordiam ad Occid. Duvels Cutz, teste Ortel. Item Herculis colurmnae, sunt duo montes, Calpe et Abyla, qui constituunt fretum illud, quod fretum Herculis dicitur. Referunt enim Chronographi, Herculem… …   Hofmann J. Lexicon universale

  • HERCULIS ins — hodie Asinara, teste Ortelio, ins. Sardiniae in ora Occid. ubi duas Herculis insulas, Plin. l. 3. c. 7. habet. Ea Linaria, teste Fran. Fara, cui magis habenda fides tamquam indigenae …   Hofmann J. Lexicon universale

  • Hercŭlis insŭlae — Hercŭlis insŭlae, zwei Eilande an der Nordwestspitze Sardiniens; jetzt Asinara u. Piana …   Pierer's Universal-Lexikon

  • Hercŭlis portus — Hercŭlis portus, 1) (Portus cosanus) der Hafen von Cosa (s.d.) an der Küste Etruriens; jetzt Porto d Ercole; 2) Hafen in Bruttium, wahrscheinlich zu Vibo gehörig u. jetzt Tropea; 3) Hafenplatz auf der Südküste von Sardinien; jetzt Pula; 4) H.… …   Pierer's Universal-Lexikon

  • Hercŭlis promontorĭum — Hercŭlis promontorĭum, Vorgebirg, 1) in Britannia romana, an der Westküste; jetzt Hartland Point; 2) in Bruttium die südlichste Spitze Italiens; jetzt Cap Spartivento; 3) in Mauritanien; jetzt Cap Mogador …   Pierer's Universal-Lexikon

  • Hercŭlis scyphus — (Ant.), großer Becher, zwei Congii (ungefähr. 11/2 Kanne) fassend …   Pierer's Universal-Lexikon

  • Hercŭlis sylva — (a. Geogr.), Wald in Germanien, östlich von der Weser; jetzt der Süntel in Westfalen …   Pierer's Universal-Lexikon

  • HERCULIS Castra — seu Herculeum, opp. fuit Ubiorum, nunc sup. Geldriae, vulgo Erckelens: Insertum tam Duc. Iuliacensi, alias munitum ab Hisp. Ad Ruram fluv. vix 3. mill. a. Iuliaco in Bor. Geldriam versus 6 …   Hofmann J. Lexicon universale

  • HERCULIS Civ — magna et parva cognominatae Ptol. in Aegypto. Plin. l. 5. c. 9. etc …   Hofmann J. Lexicon universale

  • HERCULIS Monaeci portus — opp. parvum cum arec sirmissima in ora Liguriae, in rupe, Nicaeaefinitimum, Monaco, vulgo Mourgues Gall. Plin. l. 3. c. 5. Sub proprio Principe, e gente Grimalda, qui A. C. 1641. Hispanis eiectis Gallicum praesidium recepit. Gaudet palatio… …   Hofmann J. Lexicon universale

  • HERCULIS Portus — geminus: unus in Hetrutia, opp. parv. cum arce et portu utcumque capaci, Porto Hercole, in dit. Hisp. in parte Or. montis Argentarii, 6. mill. ab Orbetello in Austr. Baudr. Alter pag. Brutiorum in ora Calabriae ulter. Plin. le Formicole, teste… …   Hofmann J. Lexicon universale

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”