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The highly magnetized white dwarf in the binary system AR Scorpii was identified in 2016 as the first pulsar in which the compact object is a white dwarf instead of a neutron star. [118] A second white dwarf pulsar was discovered in 2023. [119]
An exoplanet orbits PSR B1620-26 and its white dwarf companion (see below) in a circumbinary orbit. HD 49798: 1,600 White dwarf: One of the smallest white dwarf stars known. [14] ZTF J1901+1458: 1,809 Currently the most massive white dwarf known. [15] Janus: 3,400 A white dwarf with a side of hydrogen and another side of helium. [16] Wolf 1130 ...
Like other white dwarfs, it is a very dense star: its mass has been estimated to be about 67% of the Sun's, [28] yet it has only 1% of the Sun's radius (1.23 times the Earth's radius). [ 7 ] [ a ] The outer atmosphere has a temperature of approximately 6,110 K , [ 28 ] which is relatively cool for a white dwarf.
Vesta is a rocky object in our solar system's main asteroid belt with a diameter of about 330 miles (530 km). ... This white dwarf started its life as a star about twice the sun's mass, living a ...
The researchers estimated that the white dwarf is orbiting the black hole at about 5% the distance that separates Earth from the sun, or a bit under 5 million miles (8 million km).
Size comparison of Sirius B and Earth. Sirius B (sometimes called "the Pup" [97]) is one of the most massive white dwarfs known. With a mass of 1.02 M ☉, it is almost double the 0.5–0.6 M ☉ average. This mass is packed into a volume roughly equal to the Earth's. [56]
Van Maanen's star is also the nearest solitary white dwarf [5] First white dwarf with a planet WD B1620−26: 2003 PSR B1620-26 b (planet) This planet is a circumbinary planet, which circles both stars in the PSR B1620-26 system [6] [7] First singular white dwarf with a transiting object WD 1145+017: 2015 Known object is a disintegrating ...
For reasons that remain unclear, the mass of Procyon B is unusually low for a white dwarf star of its type. [13] With a surface temperature of 7,740 K, it is also much cooler than Sirius B; this is a testament to its lesser mass and greater age. The mass of the progenitor star for Procyon B was about 2.59 +0.22