Additional evidence for A 0620-00 containing a black hole?

Astronomy and Astrophysics – Astronomy

Scientific paper

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Black Holes (Astronomy), Novae, Ultraviolet Radiation, X Ray Stars, Stellar Evolution, Stellar Mass, Stellar Mass Accretion, Stellar Models

Scientific paper

In this letter, we propose that the superhump and the late-superhump should also appear in UV and X-ray fluxes in addition to in visual light, and we speculate that the 7.8 day's X-ray modulation in the late phase of the decline in the eruption of the X-ray nova A 0620-00 has something to do with the late-superhump phenomena, which appear in the high-inclination system VW Hydri. We deduce the lower limit of the primary mass of 3.43 solar masses, using the constraint that the mass ratio for producing the superhump and the late-superhump must be less than 0.25.

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