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

Dwek, Eli and Cherchneff, Isabelle. (2010) The Origin of Dust in High-Redshift Quasars: The Case of J1148+5251. In: The first stars and galaxies: Challenges for the next decade, 1294.

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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.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik
UniBasel Contributors:Cherchneff-Parrinello, Isabelle
Item Type:Conference or Workshop Item, refereed
Conference or workshop item Subtype:Conference Paper
Publisher:AIP Publishing
Series Name:AIP Conference Proceedings
Issue Number:142
Note:Publication type according to Uni Basel Research Database: Conference paper
Identification Number:
Last Modified:15 Mar 2017 10:19
Deposited On:15 Mar 2017 10:19

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