Cygnus X-1's interaction with its companion star results in what mass-exchange process?

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Study for the NOVA Black Hole Apocalypse Astronomy Test. Explore astronomy with our rich content. Use flashcards and multiple-choice questions to enhance your knowledge. Prepare effectively and uncover the mysteries of black holes. Get ready for your exam!

Multiple Choice

Cygnus X-1's interaction with its companion star results in what mass-exchange process?

Explanation:
Mass transfer in this binary happens when the black hole’s gravity pulls away the outer layers of its massive companion. The donor star loses material, which is then captured by the black hole and can form an accretion disk, producing the X-ray emission we observe. So the exchange is the stripping of material off the star, with that material ultimately accreting onto the black hole. The other ideas don’t fit because there isn’t a one-time tidal disruption or a scenario with no mass exchange; the ongoing transfer from the companion is what powers the system.

Mass transfer in this binary happens when the black hole’s gravity pulls away the outer layers of its massive companion. The donor star loses material, which is then captured by the black hole and can form an accretion disk, producing the X-ray emission we observe. So the exchange is the stripping of material off the star, with that material ultimately accreting onto the black hole. The other ideas don’t fit because there isn’t a one-time tidal disruption or a scenario with no mass exchange; the ongoing transfer from the companion is what powers the system.

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