W43A

W43A or IRAS 18450-0148 is a late-type star with an envelope of OH/IR type with a magnetically collimated jet (a protoplanetary nebula).[4] The star is in the early stages of becoming a planetary nebula, a process that will take several thousand years.[2]

W43A

Observation data Epoch J2000      Equinox J2000
Constellation	Aquila
Right ascension	18^h 47^m 41.14^s[1]
Declination	−01° 45′ 11.4″[1]
Characteristics
Spectral type	OH
Variable type	Asymptotic giant branch
Astrometry
Radial velocity (Rv)	34[2] km/s
Distance	2.22+0.38 −0.40[2] pc
Details
Luminosity	12,000[3] L☉
Other designations
W 43A, IRAS 18450-0148, 2MASS J18474097-0144553
Database references
SIMBAD	data

References

1. Spitzer Science, Center (2009). "VizieR Online Data Catalog: GLIMPSE Source Catalog (I + II + 3D) (IPAC 2008)". VizieR On-line Data Catalog. Bibcode:2009yCat.2293....0S.
2. Tafoya, Daniel; Imai, Hiroshi; Gómez, José F.; Nakashima, Jun-Ichi; Orosz, Gabor; Yung, Bosco H. K. (2020). "Shaping the Envelope of the Asymptotic Giant Branch Star W43A with a Collimated Fast Jet". The Astrophysical Journal. 890 (1): L14. arXiv:2006.07157. Bibcode:2020ApJ...890L..14T. doi:10.3847/2041-8213/ab70b8. S2CID 213655593.
3. Vickers, Shane B.; Frew, David J.; Parker, Quentin A.; Bojičić, Ivan S. (2015). "New light on Galactic post-asymptotic giant branch stars - I. First distance catalogue". Monthly Notices of the Royal Astronomical Society. 447 (2): 1673. arXiv:1403.7230. Bibcode:2015MNRAS.447.1673V. doi:10.1093/mnras/stu2383. S2CID 119245776.
4. Vlemmings, Wouter H.T.; Diamond, Philip J.; Imai, Hirosh (2006). "A magnetically collimated jet from an evolved star". Nature. 440 (7080): 58–60. arXiv:astro-ph/0603003. Bibcode:2006Natur.440...58V. doi:10.1038/nature04466. PMID 16511488. S2CID 1899909.

Further reading

• Imai, Hiroshi; Obara, Kumiko; Diamond, Philip J.; Omodaka, Toshihiro; et al. (2002). "A collimated jet of molecular gas from a star on the asymptotic giant branch". Nature. 417 (6891): 829–831. Bibcode:2002Natur.417..829I. doi:10.1038/nature00788. PMID 12075345. S2CID 27760425.
• Imai, Hiroshi; Nakashima, Jun-ichi; Diamond, Philip J.; Miyazaki, Atsushi; et al. (2005). "A Biconically Expanding Flow in W43A Traced by SiO Maser Emission". The Astrophysical Journal. 622 (2): L125–L128. Bibcode:2005ApJ...622L.125I. doi:10.1086/429820.
• Deacon, R. M.; Chapman, J. M.; Green, A. J.; Sevenster, M. N. (2007). "H2O Maser Observations of Candidate Post-AGB Stars and Discovery of Three High-Velocity Water Sources". The Astrophysical Journal. 658 (2): 1096–1113. arXiv:astro-ph/0702086. Bibcode:2007ApJ...658.1096D. doi:10.1086/511383. S2CID 7776074.
• M. Szymczak & E. Gérard (2004). "Polarimetric observations of OH masers in proto-planetary nebulae". Astronomy & Astrophysics. 423: 209–219. arXiv:astro-ph/0405316. Bibcode:2004A&A...423..209S. doi:10.1051/0004-6361:20040461. S2CID 15651391.