Presentation #116.93 in the session Stellar/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.
Distinguishing coronal geometries in stellar mass black hole observations is essential to understanding the physics that occur in the inner accretion flow as well as recognizing the degeneracies of black hole spin, mass, and inclination. Evidence for preferential coronal orientations have been recently reported using polarimetry, but so far no instrument has been able to discern them from energy spectra alone. We present simulations of the next-generation HEX-P mission covering the 0.1—150 keV energy range with the general relativistic ray tracing code kerrC. This code allows us to simulate spectra for 68,040 black hole, accretion disk, and corona configurations for the HEX-P instrument. We identify spectral differences in the >100 keV energy band corresponding to cone, wedge, and truncated disk geometries that can only be obtained with this new all-purpose X-ray observatory.
More information on HEX-P, including the full team list, is available at https://hexp.org.