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...
16 KB (1,683 words) - 15:15, 18 July 2024
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...
51 KB (5,864 words) - 19:05, 16 July 2024
Luminous blue variable (redirect from P Cygni variable)
one of the brightest stars of the Large Magellanic Cloud. The LBV stars P Cygni and η Carinae have been known as unusual variables since the 17th century...
38 KB (4,733 words) - 10:13, 14 August 2024
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...
4 KB (423 words) - 16:13, 6 February 2024
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...
14 KB (1,517 words) - 16:24, 17 July 2024
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...
124 KB (14,881 words) - 23:41, 28 July 2024
Deneb (redirect from Alpha Cygni)
consisting of Deneb, Gamma Cygni, Delta Cygni, 30 Cygni, Nu Cygni, Tau Cygni, Upsilon Cygni, Zeta Cygni and Epsilon Cygni. Consequently, the Chinese name...
28 KB (2,991 words) - 03:13, 1 August 2024
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...
40 KB (4,533 words) - 16:48, 2 August 2024
Wolf–Rayet emission lines frequently have a broadened absorption wing (P Cygni profile) suggesting circumstellar material. A WO sequence has also been...
96 KB (10,604 words) - 04:32, 1 August 2024
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...
50 KB (5,255 words) - 11:51, 22 June 2024
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...
104 KB (11,330 words) - 14:12, 9 August 2024
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...
11 KB (1,057 words) - 01:23, 19 July 2024
consisting of Epsilon Cygni, Gamma Cygni, Delta Cygni, 30 Cygni, Alpha Cygni, Nu Cygni, Tau Cygni, Upsilon Cygni and Zeta Cygni. Consequently, the Chinese...
14 KB (1,133 words) - 01:39, 20 June 2024
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"...
31 KB (2,925 words) - 12:56, 17 July 2024
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...
29 KB (1,597 words) - 06:46, 3 August 2024
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...
66 KB (7,350 words) - 19:08, 16 July 2024
consisting of Gamma Cygni, Delta Cygni, 30 Cygni, Alpha Cygni, Nu Cygni, Tau Cygni, Upsilon Cygni, Zeta Cygni and Epsilon Cygni. Consequently, the Chinese...
14 KB (1,231 words) - 22:41, 17 July 2024
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...
71 KB (7,279 words) - 18:00, 18 July 2024
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...
8 KB (852 words) - 00:32, 11 May 2024
Sneppen, Albert; Watson, Darach (2023-07-01). "Discovery of a 760 nm P Cygni line in AT2017gfo: Identification of yttrium in the kilonova photosphere"...
22 KB (2,193 words) - 13:01, 25 May 2024
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...
67 KB (6,913 words) - 20:40, 9 August 2024
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...
16 KB (1,607 words) - 16:42, 11 February 2024
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....
22 KB (2,051 words) - 14:13, 17 July 2024
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...
9 KB (928 words) - 20:03, 20 March 2024
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...
24 KB (2,298 words) - 08:08, 14 August 2024
designated SN 2011dh, showed a spectrum much bluer than average, with P Cygni profiles, which indicate rapidly expanding material, in its hydrogen-Balmer...
29 KB (3,023 words) - 03:28, 22 July 2024
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...
28 KB (3,188 words) - 18:49, 18 July 2024
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...
5 KB (572 words) - 14:09, 13 August 2024
of expelled circumstellar materials which can produce emission lines, P Cygni profiles, or forbidden lines. The MK system assigns stars to luminosity...
39 KB (5,371 words) - 18:49, 20 July 2024
89 and 7.07 in 87 days. This star has been found to display an inverse P Cygni profile, where cold infalling gas on to the star creates redshifted hydrogen...
119 KB (11,793 words) - 22:41, 13 August 2024