The High Energy X-ray Probe (HEX-P): Probing the power of accreting compact objects

HEX-P is a probe-class mission concept that will combine high spatial resolution X-ray imaging (<10 arcsec FWHM) and broad spectral coverage (0.1-150 keV) with an effective area far superior to current facilities (including XMM-Newton and NuSTAR), to enable revolutionary new insights into a variety of important astrophysical problems. Given their copious emissions in the X-ray band, accreting compact objects are some of the primary targets of HEX-P. We present a broad range of new exciting science that will be accessed by exploiting the superior capabilities of HEX-P’s design. This includes studies of spin distributions for supermassive and stellar-mass black holes (including ultraluminous X-ray sources); accreting neutron stars, their magnetic fields and equations of state; characterization of tidal disruption events in X-rays; broadband spectroscopy of blazars; and spectral-timing analysis in general. More information on HEX-P, including the full team list, is available at https://hexp.org.