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

In this paper, we report on our analysis using Hubble Space Telescopeastrometry and Keck-I HIRES spectroscopy of the central six stars of Tycho'ssupernova remnant (SN 1572). With these data, we measured the proper motions,radial velocities, rotational velocities, and chemical abundances of theseobjects. Regarding the chemical abundances, we do not confirm the unusu- allyhigh [Ni/Fe] ratio previously reported for Tycho-G. Rather, we find that forall metrics in all stars, none exhibit the characteristics expected fromtraditional SN Ia single-degenerate-scenario calculations. The only possibleexception is Tycho-B, a rare, metal-poor A-type star; however, we are unable tofind a suitable scenario for it. Thus, we suggest that SN 1572 cannot beexplained by the standard single-degenerate model.

A High-Resolution Spectroscopic Search for the Remaining Donor for Tycho's Supernova