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White Dwarfs Adriana Romo Paola Lopez period 4 5-20-10 #40C I•nterviewer: What is a white dwarf star? Scientist: A white dwarf is the final stage of the evolution of a star that is between .07 and 1.4 solar masses. Interviewer: What are white dwarfs supported by? Scientist: There supported by electron degeneracy and they are found to the lower left of the main sequence of the H-R diagram. Interviewer: What do white dwarfs represent? Scientist: They represent a stable phase in which stars of less than 1.4 solar masses line out the rest of their lives. Interviewer: How did the white dwarf get its name? Scientist: They got their name because of the white color of the first few white dwarfs discovered. Interviewer: How are white dwarfs characterized? Scientist: They are characterized by a low luminosity, a mass close to that of our sun,and radius only that of the earth. Interviewer: What was the first white dwarf named? Scientist: The first white dwarf found was named Sirus. Interviewer: How do white dwarfs look? Scientist: They look small , mostly faint and a glowing sphere Interviewer: How do white dwarfs become white dwarfs? Scientist: When stars don’t have enough mass if they did they would become black holes or neutron stars. Interviewer: What does the color of a white dwarf depend on? Scientist: It depends on there there temperature. Interviewer: How much mass do white dwarfs contain? Scientific: They contain as much mass as the sun. Interviewer: How much volume do white dwarfs contain? Scientist: They could contain as much as earth. Interviewer: What is the ultimate fate for the stars like the sun? Scientist: Upon its dead, a low mass star slowly collapse to become a white dwarf star ~ hardly bigger than earth, a hundred to a thousand times dimmer than our sun, and extremely dense. Interviewer: Describe the physical properties of white dwarf stars- what would one look like up close? Scientist: White dwarfs are about the size of earth or 10,000 km. In diameter, very hot and very dim. Interviewer: What is the surface temperature of a white dwarf? Scientist: Its about 20,000 degrees Celsius. Interviewer: What would happen to the white dwarf’s core? Scientist: The core will have no further source of energy and gradually radiate away and cool down. EXTRA CREDIT More extra credit More extra extra credit THE END THE END ~~