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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

This work reports the low- and high-resolution spectroscopic diagnostic diagrams, radial velocity, stellar parameters and abundance analysis of the planetary nebula Hen 3-1312. The low- and high-resolution spectra reveal that Hen 3-1312 is in fact a very-low-excitation object, in a binary system with a supergiant as a cool central star. The analysis of the high-resolution spectrum shows the cool stellar component to have an eective temperature of Te = 6500 100 K and a surface gravity of logg= 0:8 0:2 corresponding to a spectral type of F(6-7)I. These parameters result in an estimated primary luminosity of 4100 L, implying a distance of 4400 pc which is in agreement with previous determinations. The abundance analysis reveals Hen 3-1312 to be a metal-poor object having (Fe=H)= 1:1. The mean abundances of carbon, nitrogen and oxygen are found to be solar, however the-elements (Mg, Si and Ca) are underabundant relative to the Sun. The abundance profile of Hen 3-1312 is analyzed and compared with other classes of stars with similar atmospheric parameters.

The nature of Hen 3-1312: A post-AGB star in a binary system