The Key to Identifying a Black Hole Candidate in a Binary

question 129

Multiple Choice

The key to identifying a black hole candidate in a binary system is that:

• A)one of the two stars cannot be seen.
• B)the unseen companion in the system must have a sufficiently high mass.
• C)the unseen star is a contact binary.
• D)the system must be a very strong source of radio emissions.
• E)the visible companion must be an evolving main sequence or giant star.

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Definitions:

Rate of Default

The probability that a borrower will be unable to make required payments on their debt obligation.

Credit Period

The duration during which a buyer can purchase goods or services on credit before payment is due to the seller, often expressed in days.

Percentage Cost

The cost expressed as a percentage of the purchase price or other value, often used to analyze and compare costs or expenses.

Default Rate

This is the rate at which borrowers fail to make payments on their debts, often expressed as a percentage.