%0 Generic %1 Cooke2012 %A Cooke, Ryan %A Pettini, Max %A Murphy, Michael %D 2012 %K dla metal poor popIII %T A new candidate for probing Population III nucleosynthesis with carbon-enhanced damped Lyman-alpha systems %U http://arxiv.org/abs/1201.1004 %X We report the identification of a very metal-poor damped Lyman-alpha system (DLA) at z_abs = 3.067295 that is modestly carbon-enhanced, with an iron abundance of ~1/700 solar (Fe/H = -2.84) and C,O/Fe ~ +0.6. Such an abundance pattern is likely to be the result of nucleosynthesis by massive stars. On the basis of 17 metal absorption lines, we derive a 2 sigma upper limit on the DLA's kinetic temperature of T_DLA <= 4700 K. While the best-fitting abundance pattern shows the expected hallmarks of Population III nucleosynthesis, models of high-mass Population II stars can match the abundance pattern almost as well. We discuss current limitations in distinguishing between these two scenarios and the marked improvement in identifying the remnants of Population III stars expected from the forthcoming generation of 30-metre class telescopes.

@misc{Cooke2012, abstract = { We report the identification of a very metal-poor damped Lyman-alpha system (DLA) at z_abs = 3.067295 that is modestly carbon-enhanced, with an iron abundance of ~1/700 solar ([Fe/H] = -2.84) and [C,O/Fe] ~ +0.6. Such an abundance pattern is likely to be the result of nucleosynthesis by massive stars. On the basis of 17 metal absorption lines, we derive a 2 sigma upper limit on the DLA's kinetic temperature of T_DLA <= 4700 K. While the best-fitting abundance pattern shows the expected hallmarks of Population III nucleosynthesis, models of high-mass Population II stars can match the abundance pattern almost as well. We discuss current limitations in distinguishing between these two scenarios and the marked improvement in identifying the remnants of Population III stars expected from the forthcoming generation of 30-metre class telescopes. }, added-at = {2012-01-06T18:36:07.000+0100}, author = {Cooke, Ryan and Pettini, Max and Murphy, Michael}, biburl = {https://www.bibsonomy.org/bibtex/27a52809d2dc85b417ff2d60b0354462a/miki}, description = {[1201.1004] A new candidate for probing Population III nucleosynthesis with carbon-enhanced damped Lyman-alpha systems}, interhash = {5017dacc6b3e0f34cbfc663de6f2d0eb}, intrahash = {7a52809d2dc85b417ff2d60b0354462a}, keywords = {dla metal poor popIII}, note = {cite arxiv:1201.1004 Comment: 7 pages, 4 figures, Submitted for publication in Monthly Notices of the Royal Astronomical Society}, timestamp = {2012-01-06T18:36:07.000+0100}, title = {A new candidate for probing Population III nucleosynthesis with carbon-enhanced damped Lyman-alpha systems}, url = {http://arxiv.org/abs/1201.1004}, year = 2012 }