P Cygni (34 Cygni) is a variable star in the constellation Cygnus. The designation "P" was originally assigned by Johann Bayer in Uranometria as a nova...
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Luminous blue variable (redirect from P Cygni variable)
Large Magellanic Cloud. They are considered to be rare. The LBV stars P Cygni and η Carinae have been known as unusual variables since the 17th century...
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Uranometria, Alpha, Beta and Gamma Cygni form the pole of a cross, while Delta and Epsilon form the cross beam. The nova P Cygni was then considered to be the...
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and consists of the brightest stars in Cygnus: Deneb, Sadr, Gienah, Delta Cygni and Albireo. The 'head' of the cross, Deneb, is also part of the Summer...
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Weigelt Blobs. Most lines show a P Cygni profile but with the absorption wing much weaker than the emission. The broad P Cygni lines are typical of strong...
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their spectral lines, producing a distinctive spectral shape known as a P Cygni profile. The use of hydrogen emission lines is not helpful for defining...
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Wolf–Rayet emission lines frequently have a broadened absorption wing (P Cygni profile) suggesting circumstellar material. A WO sequence has also been...
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Deneb (redirect from Alpha Cygni)
Bayer designation is α Cygni, which is Latinised to Alpha Cygni, abbreviated to Alpha Cyg or α Cyg. α Cygni (Latinised to Alpha Cygni) is the star's designation...
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spectra. He showed that the broad emission lines seen in Wolf-Rayet and P Cygni-type stars were due to strong stellar winds. Beals was the first astronomer...
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Albireo (redirect from Beta Cygni)
Albireo /ælˈbɪrioʊ/ is a double star designated Beta Cygni (β Cygni, abbreviated Beta Cyg, β Cyg). The International Astronomical Union uses the name "Albireo"...
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Stellar classification (redirect from Of?p star)
Draconis K0III – Pollux K0III – Epsilon Cygni K2V – Epsilon Eridani K2III – Kappa Ophiuchi K3III – Rho Boötis K5V – 61 Cygni A K5III – Gamma Draconis Class M...
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61 Cygni /ˈsɪɡni/ is a binary star system in the constellation Cygnus, consisting of a pair of K-type dwarf stars that orbit each other in a period of...
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consisting of Epsilon Cygni, Gamma Cygni, Delta Cygni, 30 Cygni, Alpha Cygni, Nu Cygni, Tau Cygni, Upsilon Cygni and Zeta Cygni. Consequently, the Chinese...
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V1974 Cygni or Nova Cygni 1992 was a nova, visible to the naked eye, in the constellation Cygnus. It was discovered visually with 10×50 binoculars on...
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Cygnus X-1 (redirect from V1357 Cygni)
hydrogen-alpha spectral lines of HDE 226868 show profiles similar to the star P Cygni, which indicates that the star is surrounded by a gaseous envelope that...
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Smolin, Lee (1998). The life of the cosmos. Oxford University Press US. p. 35. ISBN 0-19-512664-5. Buta, Ronald James; Corwin, Harold G.; Odewahn, Stephen...
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Sneppen, Albert; Watson, Darach (2023-07-01). "Discovery of a 760 nm P Cygni line in AT2017gfo: Identification of yttrium in the kilonova photosphere"...
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detected in the outflow. The CO and HCN spectra have a strong blue-shifted P Cygni absorption feature, and show the presence of a ~100 km/sec high velocity...
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that of a high-luminosity M-class star. The hydrogen lines, however, have P Cygni profiles fit for luminous blue variables. The spectrum is dominated by...
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Rigel (category Alpha Cygni variables)
About a quarter of the time it has a P Cygni profile; most of the rest of the time, the line has an inverse P Cygni profile, where the emission component...
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NML Cygni or V1489 Cygni (abbreviated to NML Cyg or V1489 Cyg) is a red hypergiant or red supergiant (RSG) in the constellation Cygnus. It is possibly...
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consisting of Gamma Cygni, Delta Cygni, 30 Cygni, Alpha Cygni, Nu Cygni, Tau Cygni, Upsilon Cygni, Zeta Cygni and Epsilon Cygni. Consequently, the Chinese...
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around an M-type star PDS 70b around a K-type star Orion variable EX Lupi P Cygni profile Appenzeller, I; Mundt, R (1989). "T Tauri stars". The Astronomy...
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designated SN 2011dh, showed a spectrum much bluer than average, with P Cygni profiles, which indicate rapidly expanding material, in its hydrogen-Balmer...
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16 Cygni A and 16 Cygni B, together with a red dwarf, 16 Cygni C. In 1996 an extrasolar planet was discovered in an eccentric orbit around 16 Cygni B....
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1 (or Icarus) — second most distant star, 9 billion light years away. P Cygni — suddenly brightened in the 17th century WNC4 — Messier Object 40 Zeta...
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designations, but some have survived to refer to astronomical objects: P Cygni for example is still used as a designation for Nova Cyg 1600. Tycho's Star...
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observed many times over the coming decades. In 1924, it was described as "P Cygni class" and recorded at photographic magnitude 9.5 In 1925, its absolute...
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p. 529. ISBN 978-3-540-76582-0. Dolan, Michelle M.; Mathews, Grant J.; Lam, Doan Duc; Lan, Nguyen Quynh; Herczeg, Gregory J.; Dearborn, David S. P. (2017)...
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of expelled circumstellar materials which can produce emission lines, P Cygni profiles, or forbidden lines. The MK system assigns stars to luminosity...
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