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The white dwarf existed for 10.21 ±0.22 Gyrs, meaning the total age is 10.7 ±0.3 Gyrs. [1] Cold white dwarfs are often strongly affected by collision induced absorption (CIA) of hydrogen. This can lead to faint optical red and infrared brightness. These white dwarfs are also called IR-faint white dwarfs. WD J2147–4035 is however very red (r ...
Pages in category "White dwarfs" The following 167 pages are in this category, out of 167 total. ... Post common envelope binary; Procyon; PSR B1620−26; PSR J0348+0432;
The Oriental white-eye is a very common resident of Thailand. The birds of Thailand number nearly one thousand species, of which approximately 45 are rare or accidental. At least seven bird species previously found in Thailand have since been made locally extinct, and approximately fifty of Thailand's bird species are globally threatened. [2]
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 ...
White dwarfs with hydrogen-poor atmospheres, such as WD J2147–4035, are less affected by CIA and therefore have a yellow to orange color. [80] [77] The white dwarf cooling sequence seen by ESA's Gaia mission. White dwarf core material is a completely ionized plasma – a mixture of nuclei and electrons – that is
Of the seven musk deer species in the world, six are found in China and five are endangered: the Anhui musk deer and dwarf musk deer of central China, the alpine musk deer of western China, the white-bellied musk deer and black musk deer of Tibet. The Siberian musk deer in the northeast is considered vulnerable. The lesser mouse-deer is found ...
About 6% of white dwarfs show infrared excess due to a disk around a white dwarf. [66] In the past only a relative small sample of white dwarf disks was known. [67] 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.
ZTF J1901+1458 (nicknamed Z; formally ZTF J190132.9+145808.7; Gaia ID 4506869128279648512 [1]) is a white dwarf, about 135 light years away roughly in the direction of Epsilon Aquilae, discovered by the Zwicky Transient Facility circa 2021.