New emission nebulae in the POSS field Formula
| Autor: | Massimo Turatto, F. Sabbadin, L. Salvadori, C. Zanin, S. Benetti, E. Cappellaro |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Physics
Nebula Reflection nebula Astrophysics::High Energy Astrophysical Phenomena Molecular cloud Astronomy Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Planetary nebula Emission nebula Space and Planetary Science Dark nebula Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Herbig–Haro object Emission spectrum Astrophysics::Galaxy Astrophysics |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 267:871-880 |
| ISSN: | 1365-2966 0035-8711 |
| DOI: | 10.1093/mnras/267.4.871 |
| Popis: | By comparing red and infrared POSS prints of the field 18 h 48 m +0° we have identified four hitherto unknown emission nebulae. Three of these turn out to be compact planetary nebulae, two of which are probably type I PNe. None of these three nebulae has an IRAS counterpart, which indicates that they have small, if any, infrared excesses. The emission-line ratios in the spectrum of the remaining nebula, HHG 33.3+0.2, indicate that the gas is excited by shock. This, combined with its structure, indicates that HHG 33.3+0.2 is a Herbig-Haro object. This nebula is located near the well-studied reflection nebula GGD 30 and is probably related to a molecular cloud at 1.7 kpc |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|