A systematic study of spiral density waves in the accretion discs of Cataclysmic Variables

Autor:	Ruiz-Carmona, R., Groot, P. J., Steeghs, D. T. H.
Rok vydání:	2019
Předmět:	Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Solar and Stellar Astrophysics
Druh dokumentu:	Working Paper
DOI:	10.1093/mnras/stz2992
Popis:	Spiral density waves are thought to be excited in the accretion discs of accreting compact objects, including Cataclysmic Variable stars (CVs). Observational evidence has been obtained for a handful of systems in outburst over the last two decades. We present the results of a systematic study searching for spiral density waves in CVs, and report their detection in two of the sixteen observed systems. While most of the systems observed present asymmetric, non-Keplerian accretion discs during outburst, the presence of ordered structures interpreted as spiral density waves is not as ubiquitous as previously anticipated. From a comparison of systems by their system parameters it appears that inclination of the systems may play a major role, favouring the visibility and/or detection of spiral waves in systems seen at high inclination. Comment: 42 pages, 12 figures, 5 tables, 5 appendices
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1910.12089 Zobrazit plný text záznamu View this record from Arxiv