A Preferred Orientation Angle for Bipolar Planetary Nebulae

被引：1
|
作者：
Ritter, Andreas [1 ]
Parker, Quentin A. [1 ]
机构：
[1] Univ Hong Kong, Lab Space Res, Hong Kong, Peoples R China
来源：
GALAXIES | 2020年 / 8卷 / 02期
关键词：
methods; statistical; astronomical data bases; planetary nebulae; general;
D O I：
10.3390/galaxies8020034
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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.
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页数：6
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