Mapping NGC 7027 in New Light: CO<sup>+</sup> and HCO<sup>+</sup> Emission Reveal Its Photon- and X-Ray-dominated Regions
Mapping NGC 7027 in New Light: CO<sup>+</sup> and HCO<sup>+</sup> Emission Reveal Its Photon- and X-Ray-dominated Regions
The young and well-studied planetary nebula NGC 7027 harbors significant molecular gas that is irradiated by luminous, point-like UV (central star) and diffuse (shocked nebular) X-ray emission. This nebula represents an excellent subject to investigate the molecular chemistry and physical conditions within photon- and X-ray-dominated regions (PDRs and XDRs). As …