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 results of the 2006 April multi-wavelengths campaign of SS 433,focusing on X-ray data observed with Suzaku at two orbital phases (in- andout-of- eclipse) and simultaneous optical spectroscopic observations. Byanalyzing the Fe25 K_alpha lines originating from the jets, we detect rapidvariability of the Doppler shifts, dz/dt ~ 0.019/0.33 day^-1, which is largerthan those expected from the precession and/or nodding motion. This phenomenonprobably corresponding to "jitter" motions observed for the first time inX-rays, for which significant variability both in the jet angle and intrinsicspeed is required. From the time lag of optical Doppler curves from those ofX-rays, we estimate the distance of the optical jets from the base to be ~(3-4)\times 10^14 cm. Based on the radiatively cooling jet model, we determine theinnermost temperature of the jets to be T_0 = 13 +/- 2 keV and 16 +/- 3 keV(the average of the blue and red jets) for the out-of-eclipse and in-eclipsephase, respectively, from the line intensity ratio of Fe25 K_alpha and Fe26K_alpha. While the broad band continuum spectra over the 5--40 keV band ineclipse is consistent with a multi-temperature bremsstrahlung emission expectedfrom the jets, and its reflection component from cold matter, theout-of-eclipse spectrum is harder than the jet emission with the basetemperature determined above, implying the presence of an additional hardcomponent.

Suzaku and Optical Spectroscopic Observations of SS 433 in the 2006 April Multiwavelength Campaign