%0 Generic %1 finkelstein2013rapidly %A Finkelstein, S. L. %A Papovich, C. %A Dickinson, M. %A Song, M. %A Tilvi, V. %A Koekemoer, A. M. %A Finkelstein, K. D. %A Mobasher, B. %A Ferguson, H. C. %A Giavalisco, M. %A Reddy, N. %A Ashby, M. L. N. %A Dekel, A. %A Fazio, G. G. %A Fontana, A. %A Grogin, N. A. %A Huang, J. S. %A Kocevski, D. %A Rafelski, M. %A Weiner, B. J. %A Willner, S. P. %D 2013 %K high-z lya reionisation sfr %T A Rapidly Star-forming Galaxy 700 Million Years After the Big Bang at z=7.51 %U http://arxiv.org/abs/1310.6031 %X Out of several dozen z > 7 candidate galaxies observed spectroscopically, only five have been confirmed via Lyman-alpha emission, at z=7.008, 7.045, 7.109, 7.213 and 7.215. The small fraction of confirmed galaxies may indicate that the neutral fraction in the intergalactic medium (IGM) rises quickly at z > 6.5, as Lyman-alpha is resonantly scattered by neutral gas. However, the small samples and limited depth of previous observations makes these conclusions tentative. Here we report the results of a deep near-infrared spectroscopic survey of 43 z > 6.5 galaxies. We detect only a single galaxy, confirming that some process is making Lyman-alpha difficult to detect. The detected emission line at 1.0343 um is likely to be Lyman-alpha emission, placing this galaxy at a redshift z = 7.51, an epoch 700 million years after the Big Bang. This galaxy's colors are consistent with significant metal content, implying that galaxies become enriched rapidly. We measure a surprisingly high star formation rate of 330 Msol/yr, more than a factor of 100 greater than seen in the Milky Way. Such a galaxy is unexpected in a survey of our size, suggesting that the early universe may harbor more intense sites of star-formation than expected.

@misc{finkelstein2013rapidly, abstract = {Out of several dozen z > 7 candidate galaxies observed spectroscopically, only five have been confirmed via Lyman-alpha emission, at z=7.008, 7.045, 7.109, 7.213 and 7.215. The small fraction of confirmed galaxies may indicate that the neutral fraction in the intergalactic medium (IGM) rises quickly at z > 6.5, as Lyman-alpha is resonantly scattered by neutral gas. However, the small samples and limited depth of previous observations makes these conclusions tentative. Here we report the results of a deep near-infrared spectroscopic survey of 43 z > 6.5 galaxies. We detect only a single galaxy, confirming that some process is making Lyman-alpha difficult to detect. The detected emission line at 1.0343 um is likely to be Lyman-alpha emission, placing this galaxy at a redshift z = 7.51, an epoch 700 million years after the Big Bang. This galaxy's colors are consistent with significant metal content, implying that galaxies become enriched rapidly. We measure a surprisingly high star formation rate of 330 Msol/yr, more than a factor of 100 greater than seen in the Milky Way. Such a galaxy is unexpected in a survey of our size, suggesting that the early universe may harbor more intense sites of star-formation than expected.}, added-at = {2013-10-24T09:27:48.000+0200}, author = {Finkelstein, S. L. and Papovich, C. and Dickinson, M. and Song, M. and Tilvi, V. and Koekemoer, A. M. and Finkelstein, K. D. and Mobasher, B. and Ferguson, H. C. and Giavalisco, M. and Reddy, N. and Ashby, M. L. N. and Dekel, A. and Fazio, G. G. and Fontana, A. and Grogin, N. A. and Huang, J. S. and Kocevski, D. and Rafelski, M. and Weiner, B. J. and Willner, S. P.}, biburl = {https://www.bibsonomy.org/bibtex/2c7928cff550180983b881a406dc0031e/miki}, description = {[1310.6031] A Rapidly Star-forming Galaxy 700 Million Years After the Big Bang at z=7.51}, interhash = {ae113231adf690f82be5ed2633607334}, intrahash = {c7928cff550180983b881a406dc0031e}, keywords = {high-z lya reionisation sfr}, note = {cite arxiv:1310.6031Comment: To be published in Nature on 24 October. Under press embargo until 1pm EDT on 23 October. 12 pages, 8 figures, 4 tables (including supplementary information)}, timestamp = {2013-10-24T09:27:48.000+0200}, title = {A Rapidly Star-forming Galaxy 700 Million Years After the Big Bang at z=7.51}, url = {http://arxiv.org/abs/1310.6031}, year = 2013 }