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SALT HRS Discovery of the Binary Nucleus of the Etched Hourglass Nebula MyCn 18

Miszalski, Brent; Manick, Rajeev; Iłkiewicz, Krystian +2 more

The shaping of various morphological features of planetary nebulae is increasingly linked to the role of binary central stars. Identifying a binary within a planetary nebula offers a powerful tool with which to directly investigate the formation mechanisms behind these features. The Etched Hourglass Nebula, MyCn 18, is the archetype for several bi…

GLACiAR, an Open-Source Python Tool for Simulations of Source Recovery and Completeness in Galaxy Surveys

Trenti, M.; Oesch, P. A.; Carrasco, D. +1 more

The luminosity function is a fundamental observable for characterising how galaxies form and evolve throughout the cosmic history. One key ingredient to derive this measurement from the number counts in a survey is the characterisation of the completeness and redshift selection functions for the observations. In this paper, we present GLACiAR, an …