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What is luminosity class V?

What is luminosity class V?

Luminosity classes are labeled with Roman numerals from I to V: I are supergiant stars, II are bright giants, III are ordinary giants, IV are subgiants, and V are ordinary main sequence stars.

What is the luminosity class of a main sequence star quizlet?

Luminosity class I represents supergiants, III represents giants, and V represents main-sequence stars; luminosity classes II and IV are intermediate to the others. The length of time for which a star of a particular mass can shine by fusing hydrogen into helium in its core.

What is the main sequence quizlet?

a small very dense star that is typically the size of a planet. A white dwarf is formed when a low-mass star has exhausted all its central nuclear fuel and lost its outer layers as a planetary nebula. You just studied 18 terms!

What is luminosity quizlet?

Luminosity: the amount of energy radiated per second by a star. Brightness: how bright a star appears to the naked eye.

What is the luminosity class of a main sequence star?

Yerkes spectral classification

Luminosity class Description Examples
II bright giants Beta Leporis – G0II
III normal giants Arcturus – K0III
IV subgiants Gamma Cassiopeiae – B0.5IVpe
V main-sequence stars (dwarfs) Achernar – B6Vep

What is the luminosity class?

A classification of stars according to their luminosity, which can vary widely for a given spectral type. Luminosity class indicates, for example, whether a star is a supergiant, a giant, or a dwarf.

What are luminosity classes?

Which luminosity represents main sequence stars?

V
Yerkes spectral classification

Luminosity class Description Examples
II bright giants Beta Leporis – G0II
III normal giants Arcturus – K0III
IV subgiants Gamma Cassiopeiae – B0.5IVpe
V main-sequence stars (dwarfs) Achernar – B6Vep

Why is there a main sequence quizlet?

Main sequence is when a star is burning hydrogen in its core. The luminosity and temperature of a main-sequence star are set by its mass. The most massive stars can burn out and explode in a supernova after only a few million years of fusion.

What is main sequence star quizlet?

Main sequence stars are stars that are fusing hydrogen atoms to form helium atoms in their cores. A small very dense star that is typically the size of a planet. A white dwarf is formed when a low-mass star has exhausted all its central nuclear fuel and lost its outer layers as a planetary nebula.

Why is there a main sequence mass-luminosity relation quizlet?

Why is there a mass-luminosity relation for main sequence stars? The more massive a star is, the higher the rate of fusion in the core is due to the larger weight pressing down on the inner layers. When the energy from the fusion reaction reaches the surface it radiates into space with a characteristic luminosity.

What is the luminosity of a star quizlet?

luminosity- The luminosity of a star is the amount of light it emits from its surface. apparent brightness-how bright the star appears to a detector here on Earth. The difference between luminosity and apparent brightness depends on distance.