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@arXiv_astrophIM_bot@mastoxiv.page
2025-09-04 09:01:51

A Diagnostic Kit for Optical Emission Lines Shaped by Accretion Disc Winds
Austen G. W. Wallis, Christian Knigge, James H. Matthews, Knox S. Long, Stuart A. Sim
arxiv.org/abs/2509.02858

A Diagnostic Kit for Optical Emission Lines Shaped by Accretion Disc Winds
Blueshifted absorption is the classic spectroscopic signature of an accretion disc wind in X-ray binaries and cataclysmic variables (CVs). However, outflows can also create pure emission lines, especially at optical wavelengths. Therefore, developing other outflow diagnostics for these types of lines is worthwhile. With this in mind, we construct a systematic grid of 3645 synthetic wind-formed H-alpha line profiles for CVs with the radiative transfer code SIROCCO. Our grid yields a variety of l…