A comparison of the spectra of the ring and ansae in NGC 7009

Autor:	S. J. Czyzak, Lawrence H. Aller
Rok vydání:	1979
Předmět:	Physics Emission nebula Space and Planetary Science Astronomy Astronomy and Astrophysics Plasma diagnostics Astrophysics Ring (chemistry) Planetary nebula Astronomical spectroscopy Spectral line
Zdroj:	Monthly Notices of the Royal Astronomical Society. 188:229-240
ISSN:	1365-2966 0035-8711
DOI:	10.1093/mnras/188.2.229
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b8628a8ef402720019448ce97ab07b81 https://doi.org/10.1093/mnras/188.2.229 Zobrazit plný text záznamu