Orbital-period Changes of Low-mass X-ray Binaries Driven by Magnetic Braking

Autor:	Fan, Yun-Ning, Shao, Yong, Chen, Wen-Cong
Rok vydání:	2024
Předmět:	Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Solar and Stellar Astrophysics
Druh dokumentu:	Working Paper
Popis:	The magnetic braking (MB) plays an important role in driving the evolution of low-mass X-ray binaries (LMXBs). The modified MB prescription, convection and rotation boosted (CARB) model, is very successful in reproducing the detected mass-transfer rates of persistent neutron star (NS) LMXBs. In this work, we investigate whether the CARB MB prescription could account for the formation and evolution of some NS and black hole (BH) LMXBs with an observed orbital period derivative. Using the MESA code, we perform a detailed binary evolution model for six NS and three BH LMXBs. Our simulations find that the CARB MB prescription can successfully reproduce the observed donor-star masses, orbital periods, and period derivatives of four NS LMXBs and one BH LMXB. Our calculated effective temperatures are in good agreement with the detected spectral types of two NS LMXBs and one BH LMXB. However, the standard MB model is difficult to produce the observed period derivatives of those LMXBs experiencing a rapid orbital shrinkage or expansion. Comment: 12 pages, 8 figures, 1 table. ApJ in press
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2410.20031 Zobrazit plný text záznamu View this record from Arxiv