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

ROSAT all-sky survey (RASS) data have provided another window to search forsupernova remnants (SNRs). In reexamining this data archive, a list ofunidentified extended X-ray objects have been suggested as promising SNRcandidate. However, most of these targets have not yet been fully explored bythe state-of-art X-ray observatories. For selecting a pilot target for along-term identification campaign, we have observed the brightest candidate,G308.3-1.4, with Chandra X-ray observatory. An incomplete shell-like X-raystructure which well-correlated with the radio shell emission at 843 MHz hasbeen revealed. The X-ray spectrum suggests the presence of a shock-heatedplasma. All these evidences confirm G308.3-1.4 as a SNR. The brightest X-raypoint source detected in this field-of-view is also the one locates closest tothe geometrical center of G308.3-1.4, which has a soft spectrum. The intriguingtemporal variability and the identification of optical/infrared counterpartrule out the possibility of an isolated neutron star. On the other hand, thespectral energy distribution from Ks band to R band suggests a late-type star.Together with a putative periodicity of \sim1.4 hrs, the interesting excessesin V, B bands and H-alpha suggest this source as a promising candidate of acompact binary survived in a supernova explosion (SN).

Identification campaign of supernova remnant candidates in the Milky Way - I: Chandra observation of G308.3-1.4