Planetary nebulae NGC 6826 and NGC 2899: early aspherical mass loss?

Autor:	Binil Aryal, C. Rajbahak, R. Weinberger
Rok vydání:	2009
Předmět:	Physics Nebula Proper motion Astronomy Astronomy and Astrophysics Astrophysics Planetary nebula Cosmology Hubble sequence symbols.namesake Space and Planetary Science symbols Asymptotic giant branch Dust emission
Zdroj:	Astrophysics and Space Science. 323:323-327
ISSN:	1572-946X 0004-640X
DOI:	10.1007/s10509-009-0076-9
Popis:	By systematically searching regions around planetary nebulae (PNe) for signs of interactions of their precursors’ wind with ambient matter we found a number of huge IRAS dust structures. Some of them may be chance projections, but a few appear to be real, like those around NGC 6826 and NGC 2899. In the case of NGC 6826 we noticed a giant (∼2°) bipolar dust emission, whose axis is along the proper motion of the central star. The PN itself is offset in the direction of motion both as to the center of this ∼30 pc large dust structure and to the center of a similarly large new Hα nebula. NGC 2899 was found in the center of a 14×11 pc quadrupolar cavity, whose directions of axes coincide with the directions of the main axes of the optical PN. In both cases, the formation of these structures appears to have commenced in the asymptotic giant branch (AGB) phase.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8d5308e3880209b914aff18e009c60cb https://doi.org/10.1007/s10509-009-0076-9 Zobrazit plný text záznamu Plný text ve formátu PDF