How Has the Mass of the Black Hole Candidate Cygnus

question 99

Multiple Choice

How has the mass of the black hole candidate Cygnus X-1 been estimated?

• A) from the periodic wobble it produces in the spectral lines of a normal companion star around which it orbits
• B) from the gravitational redshift, where the more massive the object, the greater the redshift of its spectral lines
• C) from the observed size and estimated density of the object
• D) from the periodic wobble in its own characteristic black-hole spectrum

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Definitions:

Aromatic Compound

An organic molecule characterized by its stable ring of electrons, which creates delocalized pi-electron clouds throughout the structure, contributing to its chemical stability.

Carbon Atoms

The basic building blocks of all organic compounds, consisting of six protons and six neutrons.

Structure

The arrangement of atoms within a molecule which defines the molecule's properties and reactions.

Water Soluble

The ability of a substance to dissolve in water, forming a homogenous mixture.