AM CVn - System Parameters and Gravitational Waves

• Autorzy: Smak J.

Identyfikatory

DOI

10.32023/0001-5237/73.3.2

• Języki publikacji: EN

Abstrakty

EN

System parameters of AM CVn are re-determined: M₁=0.86±0.18 M_☉, M₂=0.103±0.0022 M_☉, A=1.508±0.100×10¹⁰ cm, and i=69±3°. The secondary component of the system is a semi-degenerate helium star loosing mass at a rate M=4.93±1.65×10^-9 M_☉/yr. The accretion disk is sufficiently hot to avoid thermal instability. The orbital light curve recovered from observations made in 1962 shows minimum shifted to phase φ=0.50, corresponding to O-C=0.0060 d. Together with mimima observed in the years 1992-1999 this implies that the orbital period is increasing at a rate of dP/dt≈8.5×10^{-13 - consistent with predictions involving the emission of gravitational waves.}

Słowa kluczowe

EN

novae; cataclysmic variables; stars: individual: AM CVn; gravitational waves

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2023
• Tom: Vol. 73, No. 3
• Strony: 227--232
• Opis fizyczny: Bibliogr. 24 poz., rys.

Twórcy

autor

Smak J.

• N. Copernicus Astronomical Center, Polish Academy of Sciences, Bartycka 18, 00-716 Warsaw, Poland

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