2018/11/21 by Wei-Min Liu, Xiang-Dong Li · 11 citations
Physics and Astronomy · #Accretion (finance) #Angular momentum #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Envelope (radar) #Mechanism (biology) #Momentum (technical analysis) #Nova (rocket) #Pulsars and Gravitational Waves Research #Work (physics) #astro-ph.HE #astro-ph.SR
paper · pdf · doi:10.3847/1538-4357/aaf19f
published in The Astrophysical Journal 870(1), 22 (IOP Publishing) · 19 pages, 4 figures, 5 tables, accepted by ApJ on November 15
arxiv created 2018/11/21 · openalex created_date 2018/11/29 · openalex publication_date 2018/12/31 · arxiv updated 2019/01/16 · openalex updated_date 2026/08/05
It has been shown that the rate of angular momentum loss (AML) in cataclysmic variables (CVs) below the period gap is about 2.47 times that caused by gravitational radiation (GR), suggesting an extra AML mechanism aside from GR. Several potential mechanisms have been proposed but none of them has been verified. In this work, we examine whether AML caused by friction between the expanding nova envelope and the donor star can account for the required AML rate. By adopting various expanding velocities of the envelope, we have calculated the evolution of CVs with typical initial parameters. Our results show that this friction interaction unlikely solves the extra AML problem unless the expanding velocities are extremely low. Thus, there should be a more efficient AML mechanism that plays a role in CV evolution.