U Antliae
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Star U Antliae |
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| Image of the Atacama Large Millimeter / submillimeter Array from a dust bowl around U Antliae | |||||||||||||||||
| AladinLite | |||||||||||||||||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Air pump | ||||||||||||||||
| Right ascension | 10 h 35 m 12.85 s | ||||||||||||||||
| declination | -39 ° 33 ′ 45.3 ″ | ||||||||||||||||
| Apparent brightness | 5.38 (5.27 to 6.04) mag | ||||||||||||||||
| Typing | |||||||||||||||||
| B − V color index | (2.84) | ||||||||||||||||
| U − B color index | (7.10) | ||||||||||||||||
| R − I index | (1.32) | ||||||||||||||||
| Spectral class | C-N5 C2 5 | ||||||||||||||||
| Variable star type | LB | ||||||||||||||||
| Astrometry | |||||||||||||||||
| Radial velocity | (41.0 ± 4.4) km / s | ||||||||||||||||
| parallax | (3.57 ± 0.20) mas | ||||||||||||||||
| distance | (910 ± 60) ly (280) pc |
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| Visual absolute brightness M vis | (-5.22) mag | ||||||||||||||||
| Proper movement | |||||||||||||||||
| Rec. Share: | (−31.37 ± 0.23) mas / a | ||||||||||||||||
| Dec. portion: | (2.37 ± 0.27) mas / a | ||||||||||||||||
| Physical Properties | |||||||||||||||||
| Dimensions | 1.04 M ☉ | ||||||||||||||||
| radius | 325 R ☉ | ||||||||||||||||
| Luminosity |
8000 L ☉ |
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| Effective temperature | 2800 K | ||||||||||||||||
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Other names and catalog entries |
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U Antliae (U Ant) is a variable star in the constellation Air Pump .
U Antliae is a red C-type carbon star and a slowly irregularly changing star with a magnitude between 5.27 and 6.04. It has a surface temperature of 2,800 K and is about 900 light years away . It shines with about 8,000 times the luminosity of the sun. It is surrounded by two bowls of dust that it shed 14,000 and 10,000 years ago.
See also
literature
- Tilmann Althaus: Star evolution: dying star in the bubble . September 20, 2017 ( Spektrum.de ).
Web links
Commons : U Antliae - collection of images, videos and audio files
- U Antliae: A dying star in breathtaking clarity. In: The Standard. derstandard.de, September 24, 2017, accessed on October 23, 2017 .
- ALMA: U Antliae's smoke bubble. astronews.com, September 20, 2017, accessed October 23, 2017 .
- Representation of the movements of matter in the shell around U Antliae. eso.org, accessed October 23, 2017 .
- ESO: Aging Star Blowing Matter From It + Map, Photos & Animations from September 20th, 2017
Individual evidence
- ↑ a b c d e f g h U Ant. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed September 8, 2018 .
- ↑ a b c U Ant. In: VSX. AAVSO, accessed September 8, 2018 .
- ↑ Guandalini, R., Cristallo, S .: Luminosities of carbon-rich asymptotic giant branch stars in the Milky Way . In: Astronomy & Astrophysics . 555, 2013, p. 7. arxiv : 1305.4203 . A120. bibcode : 2013A & A ... 555A.120G . doi : 10.1051 / 0004-6361 / 201321225 .
- ^ E. De Beck, L. Decin, A. De Koter, K. Justtanont, T. Verhoelst, F. Kemper, KM Menten: Probing the mass-loss history of AGB and red supergiant stars from CO rotational line profiles. II. CO line survey of evolved stars: Derivation of mass-loss rate formulas . In: Astronomy and Astrophysics . 523, 2010, p. A18. arxiv : 1008.1083 . bibcode : 2010A & A ... 523A..18D . doi : 10.1051 / 0004-6361 / 200913771 .
- ↑ a b F. Kerschbaum, D. Ladjal, R. Ottensamer, MAT Groenewegen, M. Mecina, JADL Blommaert, B. Baumann, L. Decin, B. Vandenbussche, C. Waelkens, T. Posch, E. Huygen, W De Meester, S. Regibo, P. Royer, K. Exter, C. Jean: The detached dust shells of AQ Andromedae, U Antliae, and TT Cygni . In: Astronomy & Astrophysics . 518, 2010, p. L140. arxiv : 1005.2689 . bibcode : 2010A & A ... 518L.140K . doi : 10.1051 / 0004-6361 / 201014633 .
- ↑ The star U Antliae in the constellation Air Pump (lat. Antlia). eso.org, accessed October 23, 2017 .