SIMBAD references

2019ApJ...887..164S - Astrophys. J., 887, 164-164 (2019/December-3)

The generalized hardness-intensity diagram for black hole and neutron star X-ray binaries.


Abstract (from CDS):

Over the past half-century, X-ray and radio observations of accreting neutron stars and stellar-mass black holes have yielded a rich observational picture, with common features including state transitions and jet formation, but also sharp differences. While black hole X-ray binaries overwhelmingly suppress jets in so-called soft states, accreting neutron stars are less restrictive, with a soft state wind observed in some sources to coexist with a jet. We propose an explanation for these differences that leads to a generalization of a foundational element, the hardness-intensity diagram of Fender et al. The inverse relation between jets and winds fits into a picture that connects to prograde accretion, while the possibility of counterrotation between accretion disk and compact object accounts for observed differences in accreting neutron stars. This picture comes with a surprising twist, which is that neutron stars embody the small-scale analog of FRII quasars, an idea that allows us to complete the scale-invariant picture for the jet-disk connection.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): X-ray astronomy - Neutron stars - Accretion - Black holes - Radio jets

Simbad objects: 8

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