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

V893 Sco is an eclipsing dwarf nova that had attracted little attention fromX-ray astronomers until it was proposed as the identification of an RXTEall-sky slew survey (XSS) source. Here we report on the pointed X-rayobservations of this object using Suzaku. V893 Sco was in quiescence at thetime, as indicated by the coordinated optical photometry we obtained at theSouth African Astronomical Observatory. Our Suzaku data show V893 Sco to beX-ray bright, with a highly absorbed spectrum. Most importantly, we havediscovered a partial X-ray eclipse in V893 Sco. This is the first time that apartial eclipse is seen in X-ray light curves of a dwarf nova. Our preliminarysimulations demonstrate that the partial X-ray eclipse can be in principlereproduced if the white dwarf in V893 Sco is partially eclipsed. Higher qualityobservations of this object have the potential to place significant constraintson the latitudinal extent of the X-ray emission region and therebydiscriminating between an equatorial boundary layer and a spherical corona. Thepartial X-ray eclipse therefore makes V893 Sco a key object in understandingthe physics of accretion in quiescent dwarf nova.

Suzaku Observations of the Dwarf Nova V893 Scorpii: the Discovery of a Partial X-ray Eclipse