Year: 2025
Type: article
Abstract: We present an overview and catalogue of all known mass-transferring binary systems that have white dwarf accretors and orbital periods shorter than 70 minutes, including the AMCVn-type binary systems and a number of related objects. We provide an overview of the literature background and describe recent breakthroughs, open questions, and connections to other fields. This overview is intended to provide a starting point for researchers who are relatively new to the fields of ultracompact binaries or AMCVn-type binaries. We define the scope of the catalogue (the criteria for inclusion) and describe its format and contents (what data have been included for each target). We also summarise the observed properties of the known mass-transferring ultracompact binaries, including their orbital periods and component stellar masses and radii. Our aim in presenting the catalogue is to provide a central resource to enable researchers to track the current status of the known sample. At the time of writing, the catalogue includes 123 confirmed binaries and 29 candidates. The catalogue is hosted on a public platform (Zenodo) with version control, and will be updated regularly.
Authors: Matthew J. Green, Jan van Roestel, Tin Long Sunny Wong
Institution: University of Amsterdam
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: New Theoretical Insights into Cosmic Cataclysms, G1627983296, G1693568110, Constraining the Evolutionary Pathways for White Dwarfs: Crystallization, Cooling Anomalies, and Mergers, Hunting Dormant Black Holes in the Galaxy with SDSS-V, G5356677024, Kavli Institute for Theoretical Physics, G7649896884
OpenAlex ID: W7077233837
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