R Sculptoris
 
| |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Sculptor |
| Right ascension | 01h 26m 58.09492s[1] |
| Declination | −32° 32′ 35.4374″[1] |
| Apparent magnitude (V) | +5.72[2] (5.5 - 9.5) |
| Characteristics | |
| Spectral type | C6,5ea(Np)[3] |
| U−B color index | +7.67[2] |
| B−V color index | +3.87[2] |
| Variable type | SRb[4] |
| Astrometry | |
| Radial velocity (Rv) | −5.40[5] km/s |
| Proper motion (μ) | RA: −7.63 ± 0.69[1] mas/yr Dec.: −31.48 ± 0.46[1] mas/yr |
| Parallax (π) | 3.76 ± 0.75[1] mas |
| Distance | approx. 900 ly (approx. 270 pc) |
| Details | |
| Mass | 2 - 3[3] M☉ |
| Radius | 513[3] R☉ |
| Luminosity | 11,000[3] L☉ |
| Surface gravity (log g) | −0.59[3] cgs |
| Temperature | 2,600[3] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
R Sculptoris is an asymptotic giant branch semi-regular variable red giant star located 1,500 light-years (460 parsecs) away in the constellation of Sculptor.[6][7] Observations have revealed a spiral structure in the material around it.[8] The spiral is suspected to be caused by an unseen companion star.[6]
Gallery
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Curious spiral spotted by ALMA around red giant star R Sculptoris (data visualisation).
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R Sculptoris and its hidden companion, taken by Hubble Space Telescope
References
- 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752
. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.Vizier catalog entry - 1 2 3 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237: 0. Bibcode:2002yCat.2237....0D.
- 1 2 3 4 5 6 Cruzalèbes, P.; Jorissen, A.; Rabbia, Y.; Sacuto, S.; Chiavassa, A.; Pasquato, E.; Plez, B.; Eriksson, K.; Spang, A.; Chesneau, O. (2013). "Fundamental parameters of 16 late-type stars derived from their angular diameter measured with VLTI/AMBER". Monthly Notices of the Royal Astronomical Society. 434: 437. arXiv:1306.3288. Bibcode:2013MNRAS.434..437C. doi:10.1093/mnras/stt1037.
- ↑ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
- ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
- 1 2 "Hubble Gazes at R Sculptoris and its Hidden Companion". SpaceDaily. 11 January 2015.
- ↑ "Curious spiral spotted by ALMA around red giant star R Sculptoris (data visualisation)". Image Archive. ESO. Retrieved 11 October 2012.
- ↑ "Unexpectedly large mass loss during the thermal pulse cycle of the red giant R Sculptoris" (PDF). Research Paper. Retrieved 11 October 2012.
- Nola Taylor Redd (October 11, 2012). "Strange Star Spiral Offers Clues to Sun's Fate". SPACE.com. Scientific American. Retrieved 31 October 2012.
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