Astronomy:IRAS 18162−2048
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250px Mid-infrared image of IRAS 18162-2048 | |
| Observation data Epoch J2000.0 Equinox (celestial coordinates) | |
|---|---|
| Constellation | Sagittarius[1] |
| Right ascension | 18h 19m 11.8s[2] |
| Declination | −20° 47′ 35″[2] |
| Astrometry | |
| Distance | ~1700[3] pc |
| Details | |
| Mass | ~10[3] M☉ |
| Luminosity | ~17,000[3] L☉ |
| Other designations | |
HH 80-81 IRS | |
| Database references | |
| SIMBAD | data |
IRAS 18162-2048 is a far-infrared source discovered by IRAS spacecraft in 1983. It is associated with a large (~10 solar masses) protostar, which accretes gas from a disk that surrounds it. IRAS 18162-2048 emits two collimated radio jets along its axis of rotation. The jets are made of chains of radio sources aligned in a southwest–northeast direction. The northern jet terminates in Herbig–Haro object HH 81N, while the southern one terminates in Herbig–Haro objects HH 80 and HH 81. Its total luminosity is about 17,000 solar luminosities. The total extent of this system of jets and radio sources is about 5 pc.[3]
In 2010 HH 80–81 jet was found to emit polarized radio waves, which indicated that they were produced by relativistic electrons moving along the magnetic field estimated at 20 nT. This observation was the first of its kind to demonstrate that a protostar can have a magnetized jet.[3]
References
- ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific 99 (617): 695. doi:10.1086/132034. Bibcode: 1987PASP...99..695R Constellation record for this object at VizieR.
- ↑ 2.0 2.1 "IRAS 18162-2048". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=IRAS+18162-2048.
- ↑ 3.0 3.1 3.2 3.3 3.4 Carrasco-Gonzalez, C.; Rodríguez, L. F.; Anglada, G.; Martí, J.; Torrelles, J. M.; Osorio, M. (2010). "A Magnetized Jet from a Massive Protostar". Science 330 (6008): 1209–1212. doi:10.1126/science.1195589. PMID 21109665. Bibcode: 2010Sci...330.1209C.
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