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^ "New X-ray observations of the hot subdwarf binary HD 49798/RX J0648.0–4418". academic.oup.com. Retrieved 2023-01-08. ^ a b c d e f David Taylor (2012). "White Dwarf Stars Near The Earth" (PDF). The Life and Death of Stars. Weinberg College of Arts and Sciences - Northwestern University. ^ a b c d e f g h i "White dwarfs within 10 parsecs".
White dwarfs are thought to be the final evolutionary state of stars whose mass is not high enough to become a neutron star or black hole. This includes over 97% of the stars in the Milky Way. [ 4 ]: §1 After the hydrogen - fusing period of a main-sequence star of low or medium mass ends, such a star will expand to a red giant during which it fuses helium to carbon and oxygen in its core by ...
Dwarf star. A dwarf star is a star of relatively small size and low luminosity. Most main sequence stars are dwarf stars. The meaning of the word "dwarf" was later extended to some star-sized objects that are not stars, and compact stellar remnants that are no longer stars.
This is a list of stars, neutron stars, white dwarfs and brown dwarfs which are the least voluminous known (the smallest stars by volume).
^ Technically, white dwarfs are no longer "live" stars but, rather, the "dead" remains of extinguished stars. Their classification uses a different set of spectral types from element-burning "live" stars.
Because a main-sequence star is referred to as a dwarf star, this class of star may also be termed a yellow-white dwarf (not to be confused with white dwarfs, remnant stars that are a possible final stage of stellar evolution). Notable examples include Procyon A, Gamma Virginis A and B, [ 3 ] and KIC 8462852. [ 4 ]
Pulsating white dwarf. A pulsating white dwarf is a white dwarf star whose luminosity varies due to non-radial gravity wave pulsations within itself. Known types of pulsating white dwarfs include DAV, or ZZ Ceti, stars, with hydrogen -dominated atmospheres and the spectral type DA; [1] DBV, or V777 Her, stars, with helium -dominated atmospheres ...
Sirius is a binary star consisting of a main-sequence star of spectral type A0 or A1, termed Sirius A, and a faint white dwarf companion of spectral type DA2, termed Sirius B. The distance between the two varies between 8.2 and 31.5 astronomical units as they orbit every 50 years.