W43A

W43A

W43A
Observation data Epoch J2000      Equinox J2000
Constellation	Aquila
Right ascension	18h 47m 40.8s
Declination	-01° 44′ 57″
Characteristics
Spectral type	OH
Variable type	Asymptotic giant branch
Astrometry
Radial velocity (Rv)	13.8 km/s
Distance	8.500 ly
Details
Other designations
IRAS 18450-0148, MSX6C G030.9441+00.0350, W 43A, TVH89 353, MSX5C G030.9444+00.0347, OH 31.0 +0.0, SVM2001b 223.
Database references
SIMBAD	data
Data sources:
Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.)

W43A or IRAS 18450-0148 is Star with envelope of OH/IR type. A magnetically collimated jet from the evolved star W43A. "The dying star is in its earliest stage of becoming a Planetary nebula, a process that will take several thousand years."

References

• special stars
• Imai, Hiroshi; Obara, Kumiko; Diamond, Philip J.; Omodaka, Toshihiro; Sasao, Tetsuo (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. 

• Imai, Hiroshi; Nakashima, Jun-ichi; Diamond, Philip J.; Miyazaki, Atsushi; Deguchi, Shuji (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. 

• M. Szymczak1 and E. Gérard2 (2004). "Polarimetric observations of OH masers in proto-planetary nebulae". Astronomy e Astrophysical 423: 209–219. http://www.aanda.org/index.php?option=article&access=standard&Itemid=129&url=/articles/aa/full/2004/31/aa0461-04/aa0461-04.fig.html. 
• www.asiaa.sinica.edu.tw
• www.hs.uni-hamburg.de
• Image W43A