A Preferred Orientation Angle for Bipolar Planetary Nebulae

A Preferred Orientation Angle for Bipolar Planetary Nebulae

We present preliminary results from measuring Galactic orientation angles of 766 elliptical and bipolar Planetary Nebulae (PNe) in the Hong Kong/Australian Astronomical Observatory/Strasbourg Observatory H-alpha Planetary Nebula research platform and database (HASH DB). For elliptical PNe the distri...

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Veröffentlicht in:Galaxies 2020-06, Vol.8 (2), p.34
Hauptverfasser: Ritter, Andreas, Parker, Quentin A.
Format: Artikel
Sprache:eng
Schlagworte:
astronomical data bases
Celestial bodies
Confidence
Galaxies
methods: statistical
Nebulae
Planetary nebulae
planetary nebulae: general
Preferred orientation
Probability
Software
Standard deviation
Statistical methods
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Beschreibung
Zusammenfassung:We present preliminary results from measuring Galactic orientation angles of 766 elliptical and bipolar Planetary Nebulae (PNe) in the Hong Kong/Australian Astronomical Observatory/Strasbourg Observatory H-alpha Planetary Nebula research platform and database (HASH DB). For elliptical PNe the distribution of orientation angles is found to be more or less uniform. However, for bipolar PNe there is statistically significant evidence for preferred orientation angles (as tentatively reported before with smaller samples) across the whole Galaxy.
ISSN:2075-4434
2075-4434
DOI:10.3390/galaxies8020034