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observational overview of state transitions in x-ray binaries

observational overview of state transitions in x-ray binaries

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GRO J1655-40<br />

weak abs. l<strong>in</strong>es<br />

weak emission l<strong>in</strong>es<br />

WINDS<br />

keV -1<br />

)<br />

Residuals (Counts s -1<br />

5<br />

0<br />

-5<br />

-10<br />

-15<br />

-20<br />

-25<br />

-30<br />

5 6 7 8 9 10<br />

Energy (keV)<br />

The second example is GRO J1655-40, which had a few more observations. The hardest<br />

observation showed an iron emission l<strong>in</strong>es (not shown on slide). Go<strong>in</strong>g to the s<strong>of</strong>ter ones, we<br />

start see<strong>in</strong>g weak absorption l<strong>in</strong>es (not shown slide). The slightly harder observations, <strong>in</strong><br />

green, start show<strong>in</strong>g stronger iron absorption l<strong>in</strong>es, and the s<strong>of</strong>test one, marked by the red<br />

star, shows a complete forest <strong>of</strong> l<strong>in</strong>es. This <strong>in</strong>dicates an ever stronger grow<strong>in</strong>g w<strong>in</strong>d as we<br />

move from hard to s<strong>of</strong>t. This h<strong>in</strong>ts at an anti-correlation between jet outflows and w<strong>in</strong>d<br />

outflows. Such an anti-correlation was more directly observed <strong>in</strong> the microquasar GRS<br />

1915+105 by Joey Neilsen and Julia<br />

Lee. Obviously, more simultaneous observations are needed to from a more complete picture.

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