The distances of less-evolved planetary nebulae: a further test of statistical distance scales

Details The distances of less-evolved planetary nebulae: a further test of statistical distance scales The distances of less-evolved planetary nebulae: a further test of statistical distance scales

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005mnras.362..847p&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 362, Issue 3, pp. 847-856.

Astronomy and Astrophysics

Astronomy

9

Ism: Jets And Outflows, Planetary Nebulae: General

Scientific paper

It has recently been pointed out that a number of the methods used to determine planetary nebulae (PNe) distances may be appreciably in error. Whilst the scales of Zhang (1995), Bensby & Lundstrom (2001) and others are appropriate for higher radio brightness temperatures TB, those of Phillips and Daub are more relevant where TB is small.
We note, in the following, that the absolute bolometric magnitudes of less-evolved PNe are likely to be similar. The mean value of can therefore be used to constrain PNe distances D, and confirm the distance scales for higher TB outflows. We have used this procedure to evaluate distances to a further 47 PNe, and we find that the mean values of are consistent with those of Cahn, Kaler & Stanghellini (1992), Zhang (1995), Phillips et al. (2004) and van de Steene & Zijlstra (1995). They are, as expected, inconsistent with the lower TB scale of Phillips (2002a).

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