11 Vulpeculae

11 Vulpeculae
11 Vulpeculae fotograferad av ALMA 2018.[1]
11 Vulpeculae fotograferad av ALMA 2018.[1]
Observationsdata
Epok: J2000.0
StjärnbildRäven
Rektascension19t 47m 37,94s
Deklination+27° 18′ 41,81″[2]
Skenbar magnitud ()+2,6-<23 (V)[3]
Stjärntyp
B–V0,7[4]
VariabeltypLuminös röd nova (V838MON)[3]
Astrometri
Avstånd2 280±490[4] lå (700±150 pc)
Detaljer
Luminositet0,9[4] L☉
Temperatur14 000–100 000[4] K
Andra beteckningar
Nova Vulpeculae 1670, CK Vulpeculae, AAVSO 1943+27, 2MASS J19473793+2718418, WISE J194737.93+271842.7, HR 7539[2]
Positionen för 1670 år nova, nära Albireo.

11 Vulpeculae, eller Nova Vulpeculae 1670 och CK Vulpeculae, är en luminös röd nova[3] i stjärnbilden Räven. Den blev också den första novan som dokumenterades på ett tillförlitligt sätt av astronomerna. Den upptäcktes den 20 juni 1670 av den franske munken och astronomen Anthelme Voituret.

11 Vul har en visuell magnitud lägre än +23, men nådde vid sitt utbrott 1670 upp till +2,3.[3]

Se även

Referenser

  1. ^ ”Through the Hourglass” (på engelska). www.eso.org. https://www.eso.org/public/images/potw1841a/. Läst 5 juli 2019. 
  2. ^ [a b] ”Basic data: V* CK Vul – Cataclysmic Variable Star” (på engelska). Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=CK+Vul&submit=SIMBAD+search. Läst 5 juli 2019. 
  3. ^ [a b c d] ”CK Vul” (på engelska). The International Variable Star Index. AAVSO – American Association of Variable Star Observers. http://www.aavso.org/vsx/index.php?view=detail.top&oid=38286. Läst 5 juli 2019. 
  4. ^ [a b c d] Evans, A.; Gehrz, R. D.; Woodward, C. E.; Sarre, P. J.; Van Loon, J. T.; Helton, L. A.; Starrfield, S.; Eyres, S. P. S. (2016). ”CK Vul: A smorgasbord of hydrocarbons rules out a 1670 nova (and much else besides)” (på engelska). Monthly Notices of the Royal Astronomical Society 457 (3): sid. 2871–2876. doi:10.1093/mnras/stw352. Läst 5 juli 2019. 
Stjärnor i Räven
BayerGolden star.svg
Flamsteed
Variabler
HD
Övriga
G 185-32 · HIP 100963

Media som används på denna webbplats

Golden star.svg
(c) I, Ssolbergj, CC BY 3.0
Gold-shaded star.
Through the Hourglass CK Vulpeculae.tif
Författare/Upphovsman: ALMA (ESO/NAOJ/NRAO)/S. P. S. Eyres, Licens: CC BY 4.0
This object is possibly the oldest of its kind ever catalogued: the hourglass-shaped remnant named CK Vulpeculae. Originally thought to be a nova, classifying this unusually shaped object correctly has proven challenging over the years. A number of possible explanations for its origins have been considered and discarded. It is now thought to be the result of two stars colliding — although there is still debate about what type of stars they were.

CK Vulpeculae was first spotted on 20 June 1670 by French monk and astronomer Père Dom Anthelme. When it first appeared it was easily visible with the naked eye; over the subsequent two years the flare varied in brightness and disappeared and reappeared twice, before finally vanishing from view for good.

During the twentieth century, astronomers came to understand that most novae could be explained by the runaway explosive behaviour and interactions between two close stars in a binary system. The features seen around CK Vulpeculae didn’t seem to fit this model particularly well,however, puzzling astronomers for many years.

The central part of the remnant has now been studied in detail using the Atacama Large Millimeter/submillimeter Array (ALMA). This striking image shows the best view of the object to date, and traces the cosmic dust and emission within and around CK Vulpeculae to reveal its intricate structure. CK Vulpeculae harbours a warped dusty disc at its centre and gaseous jets which indicate some central system propelling material outwards. These new observations are the first to bring this system into focus, suggesting a solution to a 348 year-old mystery.
Nova of 1670 by Hevelius.jpg
Författare/Upphovsman: Royal Society, Licens: CC BY-SA 3.0
This chart of the position of a nova (marked in red) that appeared in the year 1670 was recorded by the famous astronomer Hevelius and was published by the Royal Society in England in their journal Philosophical Transactions. New observations made with APEX and other telescopes have now revealed that the star that European astronomers saw was not a nova, but a much rarer, violent breed of stellar collision. It was spectacular enough to be easily seen with the naked eye during its first outburst, but the traces it left were so faint that very careful analysis using submillimetre telescopes was needed before the mystery could finally be unravelled more than 340 years later.