EDP Sciences Journals List
Advanced Search
Subscriber Authentication Point
Home All issues Volume 367/3 Article
Free access article

Issue A&A
Volume 367, Number 3, March I 2001
Page(s) 967 - 972
Section Diffuse matter in space
DOI http://dx.doi.org/10.1051/0004-6361:20000439



A&A 367, 967-972 (2001)
DOI: 10.1051/0004-6361:20000439

The distances of planetary nebulae: A scaling factor based upon radial velocities

J. P. Phillips

Instituto de Astronomia y Meteorologia, Avenida Vallarta 2602, Col. Arcos Vallarta, CP 44130 Guadalajara, Jalisco, Mexico

(Received 19 May 2000 /Accepted 1 December 2000 )

Abstract
We have used the observed radial velocities of planetary nebulae, and the galactic rotation curve to define a new distance scale for planetary nebulae. Care has been taken to restrict the analysis to sources in which distance non-linearities are minimised, and for which distortion of the distance scale is likely to be small. We conclude, as a result, that the so-called "long"distance scales are the most valid, and that various "shorter"scales are unlikely to be correct. The primary systematic errors in this procedure derive from uncertainties in the galactic rotation profile, and in ${\Theta}_{0}$ and R0. Such errors are less than those normally associated with PN distance determinations.


Key words: planetary nebulae: general -- Galaxy: kinematics and dynamics

Offprint request: J. P. Phillips, jpp@udgserv.cencar.udg.mx

SIMBAD Objects in preparation



© ESO 2001


What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.
  • If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
  • You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
  • You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.