Accretion disk winds are revealed in Chandra gratings spectra of black holes .
The winds are hot and highly ionized ( typically composed of He-like and H-like charge states ) , and show modest blue-shifts .
Similar line spectra are sometimes seen in ‘ ‘ dipping ’ ’ low-mass X-ray binaries , which are likely viewed edge-on ; however , that absorption is tied to structures in the outer disk , and blue-shifts are not typically observed .
Here we report the detection of blue–shifted He-like Fe XXV ( 3100 \pm 400 km/s ) and H-like Fe XXVI ( 1000 \pm 200 km/s ) absorption lines in a Chandra /HETG spectrum of the transient pulsar and low-mass X-ray binary IGR J17480 - 2446 in Terzan 5 .
These features indicate a disk wind with at least superficial similarities to those observed in stellar-mass black holes .
The wind does not vary strongly with numerous weak X-ray bursts or flares .
A broad Fe K emission line is detected in the spectrum , and fits with different line models suggest that the inner accretion disk in this system may be truncated .
If the stellar magnetic field truncates the disk , a field strength of B = 0.7–4.0 \times 10 ^ { 9 } ~ { } { G } is implied , which is in line with estimates based on X-ray timing techniques .
We discuss our findings in the context of accretion flows onto neutron stars and stellar-mass black holes .