When We See X-Rays from an Accretion Disk in a Binary

question 1

Multiple Choice

When we see X-rays from an accretion disk in a binary system, we can't immediately tell whether the accretion disk surrounds a neutron star or a black hole. Suppose we then observe each of the following phenomena in this system. Which one would rule out the possibility of a black hole?

• A) Intense X-ray bursts
• B) Spectral lines from the companion star that alternately shift to shorter and longer wavelengths
• C) Visible and ultraviolet light from the companion star
• D) Bright X-ray emission that varies on a time scale of a few hours

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Definitions:

Destructive Confrontation

A conflict approach that likely results in harm or breakdown of relationships rather than constructive solutions.

Discrepant Viewpoint

A perspective or opinion that significantly differs from another, often leading to disagreements or debates on a particular issue.

Additive Empathy

The practice of actively building on one's empathy by accumulating understanding and emotional insights from various situations or interactions.

Interpretive Responses

Responses that involve personal interpretation, analysis, or evaluation, rather than merely factual recount.