P100016938

CG/Illustration/Data

2025/05/15

Satellites and Spacecraft > Astronomical Observation Satellites > X-Ray Imaging and Spectroscopy Mission (XRISM)
Observation Images > Astronomical Observation

X-ray emission line spectrum of PDS 456 observed with Resolve. The white curve shows the observed data, while the red curve represents the best-fit model. The blue dashed line indicates the component where X-rays pass through the wind (absorption), and the pink dashed line represents the emission from the wind itself; together, they form the total model (red curve). In the absence of gas motion, emission lines from helium-like and hydrogen-like iron (iron ions with two and one electrons, respectively) would appear at 6.7 keV and 6.97 keV. However, the emission from gas approaching Earth (blue-shifted) and gas moving away (red-shifted) blends together, creating a broadened emission feature (pink dashed line). The intensity and broadening of the line suggest that the wind is expanding in nearly all directions.

JAXA

For the media, educational and commercial use

https://www.xrism.jaxa.jp/en/