# ASTRO-H White Paper - Stellar-Mass Black Holes

## TL;DR

This white paper discusses how ASTRO-H can advance the understanding of stellar-mass black holes, focusing on X-ray binaries, by leveraging recent observational and simulation progress.

## Contribution

It highlights the potential of ASTRO-H to significantly improve measurements of black hole properties and accretion phenomena in stellar-mass black holes.

## Key findings

- Enhanced understanding of black hole spin measurements
- Insights into jet and disk wind mechanisms
- Progress in studying super-Eddington accretion flows

## Abstract

Thanks to extensive observations with X-ray missions and facilities working in other wavelengths, as well as rapidly--advancing numerical simulations of accretion flows, our knowledge of astrophysical black holes has been remarkably enriched. Rapid progress has opened new areas of enquiry, including measurements of black hole spin, the properties and driving mechanisms of jets and disk winds, the impact of feedback into local environments, the origin of periodic and aperiodic X-ray variations, and the nature of super-Eddington accretion flows, among others. The goal of this White Paper is to illustrate how ASTRO-H can make dramatic progress in the study of astrophysical black holes, particularly the study of black hole X-ray binaries.