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Due to observational challenges our knowledge of low-level accretion flowsaround neutron stars is limited. We present Nustar, Swift and Chandraobservations of the low-mass X-ray binary IGR J17062-6143, which has beenpersistently accreting at ~0.1 per cent of the Eddington limit since 2006. Oursimultaneous Nustar/Swift observations show that the 0.5-79 keV spectrum can bedescribed by a combination of a power law with a photon index of Gamma~2, ablack body with a temperature of kT_bb~0.5 keV (presumably arising from theneutron star surface), and disk reflection. Modeling the reflection spectrumsuggests that the inner accretion disk was located at R_in>100 GM/c2 (>225 km)from the neutron star. The apparent truncation may be due to evaporation of theinner disk into a radiatively-inefficient accretion flow, or due to thepressure of the neutron star magnetic field. Our Chandra gratings data revealpossible narrow emission lines near 1 keV that can be modeled as reflection orcollisionally-ionized gas, and possible low-energy absorption features thatcould point to the presence of an outflow. We consider a scenario in which thisneutron star has been able to sustain its low accretion rate through magneticinhibition of the accretion flow, which gives some constraints on its magneticfield strength and spin period. In this configuration, IGR J17062-6143 couldexhibit a strong radio jet as well as a (propeller-driven) wind-like outflow.

An in-depth study of a neutron star accreting at low Eddington rate: On the possibility of a truncated disk and an outflow