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

We report the Chandra/HRC-S and Swift/XRT observations for the 2015 outburstof the high-mass X-ray binary (HMXB) pulsar in the Small Magellanic Cloud, SMCX-2. While previous studies suggested that either an O star or a Be star in thefield is the high-mass companion of SMC X-2, our Chandra/HRC-S imageunambiguously confirms the O-type star as the true optical counterpart. Usingthe Swift/XRT observations, we extracted accurate orbital parameters of thepulsar binary through a time of arrivals (TOAs) analysis. In addition, therewere two X-ray dips near the inferior conjunction, which are possibly caused byeclipses or an ionized high-density shadow wind near the companion's surface.Finally, we propose that an outflow driven by the radiation pressure from day~10 played an important role in the X-ray/optical evolution of the outburst.

Chandra and Swift X-ray Observations of the X-ray Pulsar SMC X-2 During the Outburst of 2015