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The metal-rich white dwarf WD 1145+017 is the first white dwarf observed with a disintegrating minor planet that transits the star. [ 176 ] [ 177 ] The disintegration of the planetesimal generates a debris cloud that passes in front of the star every 4.5 hours, causing a 5-minute-long fade in the star's optical brightness. [ 177 ]
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 planetesimal, most likely an asteroid. [8] First white dwarf that is a pulsar: AR Scorpii A: 2016
About 6% of white dwarfs show infrared excess due to a disk around a white dwarf. [69] In the past only a relative small sample of white dwarf disks was known. [70] Due to advances in white dwarf detection (e.g. with Gaia or LAMOST) and improvement of WISE infrared catalogs with unWISE/CatWISE, the number has increased to hundreds of candidates.
A dwarf planet is a small planetary-mass object that is in direct orbit around the Sun, ... ( white ), and of the largest known dwarf planet ( light purple ...
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 ...
SDSS 1557 (SDSS J155720.77+091624.6, WD 1554+094) is a binary system composed of a white dwarf and a brown dwarf.The system is surrounded by a circumbinary debris disk.The debris disk was formed when a minor planet was tidally disrupted around the white dwarf in the past.
The supposed planetesimal, WD 1145+017 b, [13] with a 4.5 hour orbit, is being ripped apart by the star and is a remnant of the former planetary system that the star hosted before becoming a white dwarf. [8] [9] It is the first observation of a planetary object being shredded by a white dwarf. Several other large pieces have been seen in orbit ...
KMT-2020-BLG-0414Lb is the first confirmed terrestrial planet orbiting a white dwarf; previously only gas giants and asteroidal bodies were known. [4]: 3540 As such, this planet serves as an analog for Earth in the far future, when the Sun becomes a white dwarf. [3]