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- W3098984831 abstract "The distances to individual wind-driven bubbles such as Planetary Nebulae (PNe) can be determined using expansion parallaxes: the angular expansion velocity in the sky is compared to the radial velocity of gas measured spectroscopically. Since the one is a pattern velocity, and the other a matter velocity, these are not necessarily the same. Using the jump conditions for both shocks and ionization fronts, I show that for typical PNe the pattern velocity is 20 to 30% larger than the material velocity, and the derived distances are therefore typically 20 to 30% too low. I present some corrected distances and suggest approaches to be used when deriving distances using expansion parallaxes." @default.
- W3098984831 created "2020-11-23" @default.
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- W3098984831 date "2004-02-27" @default.
- W3098984831 modified "2023-10-13" @default.
- W3098984831 title "On expansion parallax distances for planetary nebulae" @default.
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- W3098984831 doi "https://doi.org/10.1051/0004-6361:20034485" @default.
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