The Spectral Energy Distribution of QR And : Preliminary Analysis

Abstract

ABSTRACT We present a preliminary multiwavelength spectral energy distribution (SED) analysis of the Galactic supersoft X‐ray source QR Andromedae (QR And). The longer‐wavelength portion, spanning from the ultraviolet to the infrared, was built from compiled archival and catalogue measurements, while the soft X‐ray component was represented using the XMM‐Newton /EPIC‐pn spectrum. Based on earlier work on this source, we compare the resulting SED with an irradiated accretion disk plus irradiated companion scenario, revisited here with updated source information, including a Gaia‐based distance and a revised system geometry. We explored plausible parameter combinations to examine how well this framework can reproduce the measurements. We find that the broad SED can be described with an inclination more consistent with the eclipsing nature of QR And and without requiring extreme parameter values. The results indicate that irradiation and reprocessing remain important in shaping the multiwavelength emission of QR And, although residual discrepancies at the longest wavelengths suggest that an additional contributor may still be required.