Epoch J2000.0 Equinox J2000.0
|Right ascension||16h 26m 45.025s|
|Declination||−24° 23′ 07.75″|
|Apparent magnitude (V)||13.32|
|Distance||450 ly |
Elias 2-27 (2MASS J16264502-2423077) is a YSO star with a protoplanetary disc around it, located in the Ophiuchus Molecular Cloud (ρ Oph Cld, 5 Oph Cld, Ophiuchus Dark Cloud), a star-forming region in the Ophiuchus constellation, some 450 light-years (140 parsecs) away. This star system became the first ever observed with density waves in the disc, giving it a spiral structure. Elias 2-27 is located near the double star Rho Ophiuchi (5 Ophiuchi).
In 2016, it was discovered that disc perturbations from density waves organized the disc debris into a pinwheel strcuture, with sweeping spiral arms; using observations from the Atacama Large Millimeter Array (ALMA) radio telescope. This marks the first instance of such an observation in a protoplanetary disc, though they have been previously predicted. The spiral arms start at 100 AU (9.3×109 mi; 1.5×1010 km) and extend out to 300 AU (2.8×1010 mi; 4.5×1010 km).
- Laura M. Pérez; et al. (30 September 2016). "Spiral density waves in a young protoplanetary disk". Science. 353 (6307): 1519–1521. arXiv:1610.05139. Bibcode:2016Sci...353.1519P. doi:10.1126/science.aaf8296.
- "2MASS J16264502-2423077". SIMBAD. Centre de données astronomiques de Strasbourg.
- Charles Blue (29 September 2016). "Image Release: Spiral Arms Embrace Young Star". National Radio Astronomy Observatory.
- Max Planck Institute (6 October 2016). "Astronomers Discover Density Waves in Protoplanetary Disk Surrounding Elias 2-27". SciTechDaily.
- "Spirals with a Tale to Tell". www.eso.org. Retrieved 6 October 2016.
- "Protoplanetary disc's spiral arms embrace young star". Astronomy Now. 1 October 2016.
|This star-related article is a stub. You can help Wikipedia by expanding it.|
|This extrasolar-planet-related article is a stub. You can help Wikipedia by expanding it.|