SuWt 2

SuWt 2
Emission nebula
Planetary nebula
	Image of SuWt 2 taken from the Cerro Tololo Inter-American Observatory.
Observation data: J2000 epoch
Right ascension	13h 55m 43.23s
Declination	−59° 22′ 40.03″
Distance	6,500 ly
Apparent magnitude (V)	11.52
Constellation	Centaurus
Designations	PN G311.0+02.4, DENIS J135543.2-592239, GSC 08676-01161, 2MASS J13554323-5922398, PK 311+02 2
	See also: Lists of nebulae

SuWt 2 is a planetary nebula viewed almost edge-on^[2] in the constellation of Centaurus. It is believed that high UV radiation from an undiscovered white dwarf ionizes this nebula. Currently, there is a binary system consisting of two A-type main-sequence stars whose radiation is not sufficient to photo-ionize the surrounding nebula.^[3] The nebula is easily obscured by the brighter star, HD 121228.

It has been suggested that it has a triple stellar system. One of them, which is more massive than other two A-type main-sequence stars, evolved rapidly and became a red giant, swallowing the other two stars, and produced the planetary nebula.^[2]

References

^ ^a ^b ^c "PN SuWt 2". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved December 12, 2016.
^ ^a ^b "White Dwarf Lost in Planetary Nebula". HubbleSite. Retrieved December 12, 2016.
^ Danehkar, A.; Parker, Q. A.; Ercolano, B. (2013). "Observations and three-dimensional ionization structure of the planetary nebula SuWt 2". Mon. Not. R. Astron. Soc. 434 (2): 1513–1530. arXiv:1307.2974. Bibcode:2013MNRAS.434.1513D. doi:10.1093/mnras/stt1116.

This nebula-related article is a stub. You can help Wikipedia by expanding it.

Zdroj:https://en.wikipedia.org?pojem=SuWt_2
Text je dostupný za podmienok Creative Commons Attribution/Share-Alike License 3.0 Unported; prípadne za ďalších podmienok. Podrobnejšie informácie nájdete na stránke Podmienky použitia.

[simbad-1] "PN SuWt 2". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved December 12, 2016.

[hubble-2] "White Dwarf Lost in Planetary Nebula". HubbleSite. Retrieved December 12, 2016.

[Danehkar2013-3] Danehkar, A.; Parker, Q. A.; Ercolano, B. (2013). "Observations and three-dimensional ionization structure of the planetary nebula SuWt 2". Mon. Not. R. Astron. Soc. 434 (2): 1513–1530. arXiv:1307.2974. Bibcode:2013MNRAS.434.1513D. doi:10.1093/mnras/stt1116.

[1]

[2]

[3]