The Origin of Dust in High-Redshift Quasars: The Case of J1148+5251

Details The Origin of Dust in High-Redshift Quasars: The Case of J1148+5251 The Origin of Dust in High-Redshift Quasars: The Case of J1148+5251

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1294..142d&link_type=abstract

THE FIRST STARS AND GALAXIES: CHALLENGES FOR THE NEXT DECADE. AIP Conference Proceedings, Volume 1294, pp. 142-147 (2010).

Physics

Redshift, Quasars, Universe, Clusters Of Galaxies, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies, Quasars, Particle-Theory And Field-Theory Models Of The Early Universe, Interacting Galaxies, Galaxy Pairs, And Triples

Scientific paper

Two distinct scenarios have been proposed to explain the origin of dust observed in the high-redshift (z = 6.4) quasar J1148+5251. The first scenario suggests that because of the relatively young age of the universe (~890 Myr), only massive stars could have produced the large amount of dust observed in this object. The second scenario assumes a significantly older galactic age, so that most of the dust could have formed in lower-mass AGB stars that would have sufficient time to evolve off the main sequence. In this contribution we offer a critical analysis of both scenarios, and briefly discuss alternative suggestions for the origin of dust in this object.

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