CRL 618
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CRL 618 Preplanetary Nebula |
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| Photo from the Hubble Space Telescope | |
| AladinLite | |
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Position equinox : J2000.0 |
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| Right ascension | 04h 42m 53.64s |
| declination | + 36 ° 06 ′ 53.4 ″ |
| Appearance | |
| Central star | |
| Physical data | |
| history | |
| Catalog names | |
| CRL 618, IRAS 04395 + 3601, 2MASS J04425364 + 3606534, RAFGL 618 | |
CRL 618 , also named after the discoverer of the infrared source William E. Westbrook Westbrook Nebula , a rare German Westbrook nebula , is a pre-planetary nebula .
The nebula is formed by a star of the spectral class B0, which lies hidden in the center and has been ejecting gases at a speed of 200 km / s for about 200 years. The bipolar currents, tilted about 24 ° in relation to the line of sight, consist mainly of molecular gas, which forms a shock front with older gas eruptions in the outer areas. The central star has about 12,200 times the luminosity of the sun
Web links
- scinexx .de: Clear view of fog CRL 618 August 27, 2004
Individual evidence
- ^ Westbrook Nebula - Post-AGB Star . In: SIMBAD . Center de Données astronomiques de Strasbourg. Retrieved April 16, 2009.
- ↑ Westbrook, WE; Gezari, DY; Hauser, MG; Werner, MW; Elias, JH; Neugebauer, G .; Lo, KY: One-millimeter continuum emission studies of four molecular clouds . In: Astrophysical Journal . 209, 1976, pp. 94-101. bibcode : 1976ApJ ... 209 ... 94W . doi : 10.1086 / 154695 .
- ↑ Christensen, Lars Lindberg; Tielens, AGGM: A stellar cocoon soon to hatch to a butterfly , spacetelescope.org. August 31, 2000. Retrieved May 6, 2017.
- ↑ Contreras, CS; Sahai, R .; Gil de Paz, A .: Physical structure of the protoplanetary nebula CRL618. I. Optical long-slit spectroscopy and imaging . In: Astrophysical Journal . 578, No. 1, October 2002, pp. 269-289. arxiv : astro-ph / 0206200 . bibcode : 2002ApJ ... 578..269S . doi : 10.1086 / 342316 .