SS 433
| SS 433 | |
 Konstnärs intryck av SS 433 | |
| Observationsdata Epok: J2000.0 | |
|---|---|
| Stjärnbild | Örnen |
| Rektascension | 19t 11m 49.56s[1] |
| Deklination | +04° 58′ 57.6″[1] |
| Skenbar magnitud () | +13,0 (maximum), 15,13 (minimum)[2] |
| Stjärntyp | |
| Variabeltyp | Röntgenvariabel (HMXB/XJ+E)[2] |
| Astrometri | |
| Avstånd | 18 000±700 lå (5 500±200[3] pc) |
| Andra beteckningar | |
| V1343 Aql, 4C 04.66, 1RXS J191149.7+045857, 4U 1908+05 | |
SS 433 är ett dubbelstjärnesystem i stjärnbilden Örnen. SS 443 är ett av de mest exotiska stjärnsystem astrnomerna observerat. SS 443 är en röntgendubbelstjärna och tillika röntgenvariabel som varierar i magnitud mellan +13,0 och 15,13 i ljusstyrka.[2] Den kompakta komponenten är troligtvis ett svart hål eller möjligen en neutronstjärna. Enligt den andra "normala" stjärnkompanjonens spektrum så är den en gammal stjärna av A-typ.[4]
SS 443 är därtill den första mikrokvasar man upptäckt[5] efter Cygnus X-1, som numera också räknas till denna exklusiva kategori.
SS 443 beteckning kommer från dess upptäckare, Case Western Reserve astronomerna Nicholas Sanduleak och C. Bruce Stephenson. Det var deras 443:e inlägg i deras katalog med stjärnor som har starka strålningslinjer från 1977.[5]
Se även
Referenser
Noter
- ^ [a b] SIMBAD, entry for SS 433. Accessed on line September 14, 2007.
- ^ [a b c] ”V 1343 Aql” (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=2482. Läst 11 maj 2017.
- ^ Symmetry in the Changing Jets of SS 433 and Its True Distance from Us, Katherine M. Blundell and Michael G. Bowler, Astrophysical Journal 616, #2 (December 2004), pp. L159–L162.
- ^ Identification of the Mass Donor Star's Spectrum in SS 433, T. C. Hillwig, D. R. Gies, W. Huang, M. V. McSwain, M. A. Stark, A. van der Meer, and L. Kaper, Astrophysical Journal 615, #1 (November 2004), pp. 422–431.
- ^ [a b] SS 433, David Darling, entry in The Internet Encyclopedia of Science, accessed on line September 14, 2007.
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Media som används på denna webbplats
Ss433 art big.gif
SS433 is one of the most exotic star systems known to astronomers. Its unremarkable name stems from its inclusion in a catalog of stars which emit radiation characteristic of atomic hydrogen. Its very remarkable behavior stems from a compact object, a black hole or neutron star, which has produced an accretion disk with jets. As illustrated in this artist's vision of the SS433 system based on observational data, a massive, hot star (left) is locked in a mutual orbit with a compact object. Material transfers from the massive star into an accretion disk surrounding the compact object blasting out two jets of ionized gas in opposite directions - at about 1/4 the speed of light! Radiation from the jet tilted toward the observer is blueshifted, while radiation from the jet tilted away is redshifted. The binary system itself completes an orbit in about 13 days while the jets precess (wobble like a top) with a period of about 164 days. Are the jets from SS433 related to those from black holes at the centers of galaxies?
SS433 is one of the most exotic star systems known to astronomers. Its unremarkable name stems from its inclusion in a catalog of stars which emit radiation characteristic of atomic hydrogen. Its very remarkable behavior stems from a compact object, a black hole or neutron star, which has produced an accretion disk with jets. As illustrated in this artist's vision of the SS433 system based on observational data, a massive, hot star (left) is locked in a mutual orbit with a compact object. Material transfers from the massive star into an accretion disk surrounding the compact object blasting out two jets of ionized gas in opposite directions - at about 1/4 the speed of light! Radiation from the jet tilted toward the observer is blueshifted, while radiation from the jet tilted away is redshifted. The binary system itself completes an orbit in about 13 days while the jets precess (wobble like a top) with a period of about 164 days. Are the jets from SS433 related to those from black holes at the centers of galaxies?