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SDSS J0303-0019
SDSS J0303-0019〔SIMBAD, ("QSO J0303-0019" ) (accessed 4 April 2010)〕 is a distant quasar in the z≥6 regime. It is one of the first two quasars discovered that appear to be "dust-free",〔Scientific Computing, ("Fast-growing Primitive Black Holes found in Distant Quasars " ) (accessed 4 April 2010)〕 the other being QSO J0005-0006.〔DNA India, ("Astronomers discover most primitive supermassive black holes known" ), ANI, ''19 March 2010'' (accessed 6 April 2010)〕
On 17 March 2010, Xiaohui Fan, an astronomer at the University of Arizona, leader of the team that made the discovery, announced the discovery of two quasars that have dustless spectra. The implication of this result is that the region of space in which they inhabit is primordially pristine, having not been polluted by "dust" created by the first stars.〔Times of India, ("Most primitive supermassive black holes known 'discovered'" ), ''19 March 2010'' (accessed 6 April 2010)〕〔Softpedia, ("First Black Holes Almost As Old As the Universe" ), Tudor Vieru, ''18 March 2010'' (accessed 6 April 2010)〕 These are thought to represent the earliest type of quasar.〔Discovery News, ("Primordial 'Dust Free' Monsters Lurk at the Edge of the Universe" ), Ian O'Neill, ''18 March 2010'' (accessed 6 April 2010)〕 They also announced the next earliest class of quasar, where dust is detected in proportion to the growth of the galaxy. In more recent quasars, dust is not related to the quasar or galaxy.〔Nature, ("Dust-free quasars in the early Universe" ), Linhua Jiang, Xiaohui Fan, W. N. Brandt, Chris L. Carilli, Eiichi Egami1, Dean C. Hines, Jaron D. Kurk, Gordon T. Richards, Yue Shen, Michael A. Strauss, Marianne Vestergaard, Fabian Walter, ''18 March 2010'', vol.464, pp.380-383, , , (accessed 6 April 2010)〕
==See also==
*Stardust
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