R Sculptoris
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Star R Sculptoris |
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| Spiral structure around R Sculptoris, observed in the millimeter wavelength range with ALMA . | |||||||||||||||||
| AladinLite | |||||||||||||||||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | sculptor | ||||||||||||||||
| Right ascension | 01 h 26 m 58.1 s | ||||||||||||||||
| declination | -32 ° 32 ′ 35.4 ″ | ||||||||||||||||
| Apparent brightness | 5.72 likes | ||||||||||||||||
| Typing | |||||||||||||||||
| B − V color index | (3.87) | ||||||||||||||||
| U − B color index | (7.67) | ||||||||||||||||
| R − I index | (1.39) | ||||||||||||||||
| Spectral class | C6.5ea (Np) | ||||||||||||||||
| Variable star type | SRB | ||||||||||||||||
| Astrometry | |||||||||||||||||
| Radial velocity | (−5.4 ± 2.2) km / s | ||||||||||||||||
| parallax | (2.27 ± 0.15) mas | ||||||||||||||||
| distance | (1440 ± 100) ly (440) pc |
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| Visual absolute brightness M vis | (−3.71) mag | ||||||||||||||||
| Proper movement | |||||||||||||||||
| Rec. Share: | (−9.78 ± 0.18) mas / a | ||||||||||||||||
| Dec. portion: | (−30.90 ± 0.14) mas / a | ||||||||||||||||
| Physical Properties | |||||||||||||||||
| Dimensions | (1.3 ± 0.7) M ☉ | ||||||||||||||||
| radius | (355 ± 55) R ☉ | ||||||||||||||||
| Luminosity |
(5500 ± 3000) L ☉ |
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| Effective temperature | (2640 ± 80) K. | ||||||||||||||||
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Other names and catalog entries |
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R Sculptoris ( R Scl ) is a red giant star with 355 times the solar diameter at a distance of around 1500 light years from the sun. removed in the constellation Sculptor . Observations show a spiral structure surrounding this star.
The star is pulsation- variable and is of type SRb with a period of 370 days.
See also
Web links
Commons : R Sculptoris - collection of images, videos and audio files
Individual evidence
- ↑ a b c d e f g h R Scl. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed September 4, 2018 .
- ↑ P Cruzalèbes, A Jorissen, Y Rabbia, S Sacuto, A Chiavassa, E Pasquato, B Plez, K Eriksson, A Spang, O Chesneau: Fundamental parameters of 16 late-type stars derived from Their angular diameter Measured with VLTI / AMBER . In: Monthly Notices of the Royal Astronomical Society . 434, 2013, p. 437. arxiv : 1306.3288 . bibcode : 2013MNRAS.434..437C . doi : 10.1093 / mnras / stt1037 .
- ↑ a b c R Scl. In: VSX. AAVSO, accessed September 4, 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 .
- ↑ a b c d M Wittkowski, K.-H Hofmann, S Höfner, J. B Le Bouquin, W Nowotny, C Paladini, J Young, J.-P Berger, M Brunner, I De Gregorio-Monsalvo, K Eriksson, J Hron, EM L Humphreys, M Lindqvist, M Maercker, S Mohamed, H Olofsson, S Ramstedt, G Weigelt: Aperture synthesis imaging of the carbon AGB star R Sculptoris. Detection of a complex structure and a dominating spot on the stellar disk . In: Astronomy & Astrophysics . 601, 2017, p. A3. arxiv : 1702.02574 . bibcode : 2017A & A ... 601A ... 3W . doi : 10.1051 / 0004-6361 / 201630214 .
- ↑ Curious spiral spotted by ALMA around red giant star R Sculptoris (data visualization) . In: Image Archive . ESO. Retrieved October 11, 2012.
- ↑ SuW 09.2017 p. 22ff
- ↑ Unexpectedly large mass loss during the thermal pulse cycle of the red giant R Sculptoris (PDF; 1.0 MB) In: Research Paper . Retrieved October 11, 2012.