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:

World Liquidity

The availability of global financial assets that can be easily exchanged or used for transactions.

Central Banks

National banks that provide financial and banking services for a country's government and commercial banking system, mainly responsible for monetary policy.

Fixed Exchange Rate

A rate of exchange that is set in some way and therefore prevented from rising or falling with changes in currency supply and demand.

FX Reserves

Foreign exchange reserves, assets held on reserve by a central bank in foreign currencies, used to back liabilities on their own issued currency as well as to influence monetary policy.