QSO J0005-0006 explained

QSO J0005-0006^[1] is a distant quasar in the ~z≥6 regime. It is one of the first two quasars discovered that appear to be "dust-free",^[2] the other being QSO J0303-0019.^[3] It was the first such discovered, in 2006, and confirmed in the 2010 study.

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.^{[4] [5]} These are thought to represent the earliest generation of quasar.^[6] They also announced the next earliest generation 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.^[7] QSO J0005-0006 was found to be dust free in a 2006 study of distant quasars, and confirmed as such in the 2010 study. The 2010 study removed the potential of masking the dust emission signature occurring, by studying the amount of obscuration of the quasar.^{[7] [8]}

See also

• Stardust

Notes and References

1. QSO J0005-0006. 4 April 2010.
2. Scientific Computing, "Fast-growing Primitive Black Holes found in Distant Quasars " (accessed 4 April 2010)
3. DNA India, "Astronomers discover most primitive supermassive black holes known", ANI, 19 March 2010 (accessed 6 April 2010)
4. Times of India, "Most primitive supermassive black holes known 'discovered'", 19 March 2010 (accessed 6 April 2010)
5. Softpedia, "First Black Holes Almost As Old As the Universe", Tudor Vieru, 18 March 2010 (accessed 6 April 2010)
6. Discovery News, "Primordial 'Dust Free' Monsters Lurk at the Edge of the Universe", Ian O'Neill, 18 March 2010 (accessed 6 April 2010)
7. 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)
8. The Astronomical Journal, "Probing the Evolution of Infrared Properties of z ~ 6 Quasars: Spitzer Observations", Jiang, Linhua; Fan, Xiaohui; Hines, Dean C.; Shi, Yong; Vestergaard, Marianne; Bertoldi, Frank; Brandt, W. N.; Carilli, Chris L.; Cox, Pierre; Le Floc'h, Emeric; Pentericci, Laura; Richards, Gordon T.; Rieke, George H.; Schneider, Donald P.; Strauss, Michael A.; Walter, Fabian; Brinkmann, J.;, 9 October 2006, Volume 132, Number 5,,, (accessed 7 April 2010)