Possible Formation Scenarios of ZTF J153932.16+502738.8-A Gravitational Source Close to the Peak of LISA's Sensitivity

Abstract

ZTF J153932.16+502738.8 (ZTFJ1539) is an eclipsing double-white-dwarf system with an orbital period of 6.91 minutes, and is a significant source of LISA detecting gravitational wave. However, the massive white dwarf (WD) with mass of about 0.61 M${}_{\odot }$ has a high effective temperature (48900 K), and the lower mass WD with mass of about 0.21 M${}_{\odot }$ has a low effective temperature($<$10000 K). It is challenging the popular theory of binary evolution. We investigate the formation of ZTFJ1539 via nova and Algol scenarios. Assuming that the massive WD in ZTFJ1539 just experiences a thermalnuclear runaway, nova scenario can explain the effective temperatures of two WDs in ZTFJ1539. However, in order to enlarging a semi-detached orbit of about 4---5 minutes to a detached orbit of about 7 minutes, nova scenario needs a much high kick velocity of about 200 km s${}^{-1}$ during nova eruption. The high kick velocity can result in high eccentricity of about 0.2---0.6. Algol scenario can also produce ZTFJ1539 if we take a high efficient parameter for ejecting common envelope and enhance the mass-loss rate via stellar wind trigger by tidal effect.

10 pages, 8 figures, Accepted for publication in ApJ

References in corpus (9)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Modules for Experiments in Stellar Astrophysics (MESA)
• The Evolution of Compact Binary Star Systems
• General relativistic orbital decay in a seven-minute-orbital-period eclipsing binary system
• Population synthesis for symbiotic stars with white dwarf accretors
• Mass loss out of close binaries. II
• Prospects for Gravitational Wave Measurement of ZTFJ1539+5027
• The Formation of Bimodal Dust Species in Nova Ejecta I: Chemical Conditions
• He-accreting WD: Nucleosynthesis in the extreme binary system (1.02+0.30) M${}_{\odot }$

Cited by in corpus (10)

• The Scattering of Dirac Spinors in Rotating Spheroids
• Formation and Destiny of White Dwarf and Be Star Binaries
• Li-rich and super Li-rich giants produced by element diffusion
• Novae: An Important Source of Lithium in the Galaxy
• Hydrogen-free Wolf-Rayet stars: Helium stars with envelope-inflation structure and rotation
• An Alternative Formation Scenario for Uranium-rich Giants: Engulfing a Earth-like Planet
• LISA Galactic Binaries in the Roman Galactic Bulge Time-Domain Survey
• The mixing of internal gravity waves and lithium production in intermediate-mass AGB stars
• 2M17091769+3127589: a mass-transfer binary with an extreme mass ratio
• Formation, diffusion and accreting pollution of DB white dwarfs