English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We present and analyze the orbits of eight nearby planetary nebulae (PNs)using two different Galactic models. The errors of the derived orbitalparameters are determined with a Monte Carlo method. Based on the derivedorbital parameters, we find that Sh 2-216, DeHt 5, NGC 7293, A21, and Ton 320belong to the thin-disk population, and PG 1034+001 and A31 belong to thethick-disk population. PuWe 1 probably belongs to the thick-disk population,but its population classification is very uncertain due to the large errors ofits derived orbital parameters. The PN-ISM interactions are observed for theeight PNs in our sample. The position angles of the proper motions of the PNsare consistent with the directions of the PN-ISM interaction regions. Thekinematic ages of PNs are much smaller than the time for them to cross theGalactic plane. Using the models of Borkowski et al. and Soker et al., thePN-ISM interaction can be used to derive the local density of ISM in thevicinity of evolved PNs. According to the three-dimensional hydrodynamicsimulations of Wareing et al. (WZO), Sh 2-216, A21, and Ton 320 are in the WZO3 stage, PG 1034+001 and NGC 7293 are in the WZO 1 stage, and PuWe 1 is in theWZO 2 stage.

Orbits of nearby planetary nebulae and their interaction with the interstellar medium