Criss-cross mapping BD+30 3639: a new kinematic analysis technique

Details Criss-cross mapping BD+30 3639: a new kinematic analysis technique Criss-cross mapping BD+30 3639: a new kinematic analysis technique

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011rmxac..40..202s&link_type=abstract

XIII Latin American Regional IAU Meeting (Eds. W. J. Henney & S. Torres-Peimbert) Revista Mexicana de Astronomía y Astrofísica (

Astronomy and Astrophysics

Astronomy

Ism: Jets And Outflows, Planetary Nebulae, Stars: Mass-Loss

Scientific paper

We introduce a new method to analyze proper motion data. The method is called ``criss-cross'' mapping. It emphasizes regions where proper motion vector extensions cross or converge. From a superposition of lines through the vectors, a map is generated which helps to interpret the kinematic data. The new mapping technique is applied to the young planetary nebula BD+30 3639. The data are approx. 200 internal proper motion measurements from Li, Harrington, & Borkowski (2002). From the criss-cross mapping of BD+30 3639, we conclude that the kinematic center is approximately 0.5 arcsec off-set to the South-East from the central star. The mapping also shows evidence for a non-homologous expansion of the nebula that is consistent with a disturbance aligned with the bipolar molecular bullets.

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