Astronomy:Sh 2-43
| Nebula | |
|---|---|
| Observation data: epoch | |
| Right ascension | 18h 16m 24.00s |
| Declination | −17° 30′ 60.0″[1] |
| Distance | 5,200 ly (1,600[2] pc) |
| Constellation | Sagittarius |
| Designations | Sh 2-43, RCW 156[1] |
Sh 2-43 also known as RCW 156, is an emission nebula located in the constellation of Sagittarius. It is a faint, diffuse region of ionized hydrogen gas, potentially representing a localized concentration within a broader area of interstellar emission. It lies in a relatively empty patch of sky, bordered by several OB associations including Sgr OB1, Sgr OB7, and Sct OB3.[3][2][4]
Charecterstics
The nebula includes a slightly brighter core region designated as RCW 156a[5] and is associated with the star forming region SFR 13.62-0.76,[6][7] which encompasses infrared sources, molecular clouds, and the radio H II region [CH87] 013.839-0.763.[8] It is also spatially aligned with the suspected supernova remnant GAL 013.1-00.5.[9][2]
Nearby bright star HD 167720, a K2 III giant star is visible near the nebula, though it is not responsible for ionizing the nebula.[10][2][11]
References
- ↑ 1.0 1.1 "Sh 2-43". https://simbad.cds.unistra.fr/mobile/object.html?object_name=Sh%202-43.
- ↑ 2.0 2.1 2.2 2.3 "Sh 2-43". http://galaxymap.org/cat/view/sharpless/43.
- ↑ Astronomy, Go. "Sh2-43 | Nebula in Sagittarius | GO ASTRONOMY" (in en-US). https://www.go-astronomy.com/sharpless.php?Sharpless=Sh2-43.
- ↑ Russeil, D. (January 2003). "Star-forming complexes and the spiral structure of our Galaxy" (in en). Astronomy and Astrophysics 397: 133–146. doi:10.1051/0004-6361:20021504. ISSN 0004-6361. Bibcode: 2003A&A...397..133R. https://ui.adsabs.harvard.edu/abs/2003A&A...397..133R/abstract.
- ↑ "RCW 156a". http://galaxymap.org/cat/view/rcw/156a.
- ↑ "Star Formation Region Avedisova 196 | Galaxy Map". http://galaxymap.org/avedisova/html/196.html.
- ↑ "VizieR". https://vizier.cfa.harvard.edu/viz-bin/VizieR-6?-out.form=+H&-source=5112&-corr=PK=nSFR&-out.max=9999&nSFR==%2013.62-0.76.
- ↑ "[CH87 013.839-0.763"]. https://simbad.cds.unistra.fr/mobile/object.html?object_name=%5BCH87%5D+013.839-0.763.
- ↑ "GAL 013.1-00.5". https://simbad.harvard.edu/simbad/sim-id.
- ↑ "HD 167720". https://simbad.cds.unistra.fr/mobile/object.html?object_name=HD%20167720.
- ↑ Gorham, Peter W. (November 1990). "A Radio/Infrared/Optical Study of Candidate Supernova Remnants from the Clark Lake 30.9 MHz Galactic Plane Survey" (in en). The Astrophysical Journal 364: 187. doi:10.1086/169401. ISSN 0004-637X. Bibcode: 1990ApJ...364..187G. https://ui.adsabs.harvard.edu/abs/1990ApJ...364..187G/abstract.
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