Which stellar remnant occupies the lower-left corner of the H-R diagram, such as Sirius B?
Answer
White dwarfs
White dwarfs are found in the lower-left region of the H-R diagram. This placement signifies that they are intrinsically hot, evidenced by their blue-white color, but exhibit low overall luminosity. This low total light output occurs because, despite their high surface temperature, their surface area (radius) is extremely small, often comparable to the size of Earth. Sirius B is cited as a prime example demonstrating this state of a hot, yet faint, compact stellar corpse.
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