Search results
Results from the WOW.Com Content Network
White dwarf - Wikipedia
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. [15] ZTF J1901+1458: 1,809 Currently the most massive white dwarf known. [16] Janus: 3,400 A white dwarf with a side of hydrogen and another side of helium. [17] Wolf 1130 ...
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 [5] [6] First singular white dwarf with a planet WD 1145+017: 2015 WD 1145+017 b: Planet is extremely small and is disintegrating. First white dwarf that is a pulsar: AR Scorpii A ...
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 ...
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) [8] [a] The outer atmosphere has a temperature of approximately 6,110 K, [28] which is relatively cool for a white dwarf. As all white dwarfs steadily radiate ...
G 240-72 is the seventh closest white dwarf (after Sirius B, Procyon B, van Maanen's star, Gliese 440, 40 Eridani B and Stein 2051 B). Its trigonometric parallax is 0.1647 ± 0.0024 arcsec , [ 5 ] corresponding to a distance 6.07 ± 0.09 pc , or 19.80 +0.29
This measurement marked the first direct gravitational mass determination of a single white dwarf. [6] Gliese 440 has only 56% of the Sun's mass, [6] but it is the remnant of a massive main-sequence star that had an estimated 4.4 solar masses. [22] While it was on the main sequence, it probably was a spectral class B star (in the range B4–B9 ...
There is a minor dispute about the proper nomenclature rules to use for this unusual star system. One side regards the A/B convention of naming binary stars as having priority, so that the pulsar is PSR B1620−26 A, the white dwarf companion is PSR B1620−26 B and the planet is PSR B1620−26 c. The other side considers PSR to apply only to ...