SAO 206462
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lupus |
| Right ascension | 15h 15m 48.4460s[1] |
| Declination | −37° 09′ 16.024″[1] |
| Apparent magnitude (V) | 8.708[2] |
| Characteristics | |
| Spectral type | F8V[2] |
| Astrometry | |
| Proper motion (μ) | RA: −19.210[1] mas/yr Dec.: −23.268[1] mas/yr |
| Parallax (π) | 7.4074 ± 0.0159 mas[1] |
| Distance | 440.3 ± 0.9 ly (135.0 ± 0.3 pc) |
| Details | |
| Mass | 1.5[1] M☉ |
| Radius | 2.1[1] R☉ |
| Luminosity | 6.4[1] L☉ |
| Surface gravity (log g) | 3.80[1] cgs |
| Temperature | 6,313[1] K |
| Age | 10.5[3] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
SAO 206462 is a young binary star, surrounded by a circumstellar disc of gas and clearly defined spiral arms. It is situated about 440 light-years away from Earth in the constellation Lupus.[4] The presence of these spiral arms seems to be related to the existence of planets inside the disk of gas surrounding the star. The disk's diameter is about twice the size of the orbit of Pluto.[5]
Discovery
[edit]The discovery of this object was presented in October 2011 by Carol Grady, astronomer of Eureka Scientific, headquartered in the Goddard Space Flight Center at NASA. It was the first of this class that exhibited a high degree of clarity and was made using several space telescopes (Hubble, FUSE, Spitzer) and earth telescopes (Gemini Observatory and Subaru Telescope, situated in Hawaii), through an international research program of young stars and of stars with planets. A number of astronomers of different observatories collaborated.[6]
References
[edit]- ^ a b c d e f g h i j Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b "SAO 206462". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 26 December 2016.
- ^ Guzmán-Díaz, J.; Mendigutía, I.; Montesinos, B.; Oudmaijer, R. D.; Vioque, M.; Rodrigo, C.; Solano, E.; Meeus, G.; Marcos-Arenal, P. (2021), "Homogeneous study of Herbig Ae/Be stars from spectral energy distributions and Gaia EDR3", Astronomy & Astrophysics, 650: A182, arXiv:2104.11759, Bibcode:2021A&A...650A.182G, doi:10.1051/0004-6361/202039519, S2CID 233393918
- ^ http://informe21.com/ciencia-tecnologia/nasa-capta-fotografia-sao-206462-primera-estrella-forma-espiral La NASA capta una fotografía de SAO 206462, la primera estrella con forma espiral] Archived 2016-03-04 at the Wayback Machine. Informe21.com, 3 November 2011
- ^ https://science.nasa.gov/science-news/science-at-nasa/2011/31oct_spiralarms/ 31 October 2011. Nasa Science.
- ^ Grady, C. A.; Schneider, G.; Sitko, M. L.; Williger, G. M.; Hamaguchi, K.; Brittain, S. D.; Ablordeppey, K.; Apai, D.; Beerman, L.; Carpenter, W. J.; Collins, K. A.; Fukagawa, M.; Hammel, H. B.; Henning, Th.; Hines, D.; Kimes, R.; Lynch, D. K.; Ménard, F.; Pearson, R.; Russell, R. W.; Silverstone, M.; Smith, P. S.; Troutman, M.; Wilner, D.; Woodgate, B.; Clampin, M. (2009). "Revealing the Structure of a Pre-Transitional Disk: The Case of the Herbig F Star SAO 206462 (HD 135344B)". The Astrophysical Journal. 699 (2): 1822. Bibcode:2009ApJ...699.1822G. doi:10.1088/0004-637X/699/2/1822. S2CID 9298646.
