%0 Generic %1 bagley2017space %A Bagley, Micaela B. %A Scarlata, Claudia %A Henry, Alaina %A Rafelski, Marc %A Malkan, Matthew %A Teplitz, Harry %A Dai, Y. Sophia %A Baronchelli, Ivano %A Colbert, James %A Rutkowski, Michael %A Mehta, Vihang %A Dressler, Alan %A McCarthy, Patrick %A Bunker, Andrew %A Atek, Hakim %A Garel, Thibault %A Martin, Crystal L. %A Hathi, Nimish %A Siana, Brian %D 2017 %K LAE high redshift %T A High Space Density of Luminous Lyman Alpha Emitters at z~6.5 %U http://arxiv.org/abs/1701.05193 %X We present the results of a systematic search for Lyman-alpha emitters (LAEs) at $6 z 7.6$ using the HST WFC3 Infrared Spectroscopic Parallel (WISP) Survey. Our total volume over this redshift range is $8 \times10^5$ Mpc$^3$, comparable to many of the narrowband surveys despite their larger area coverage. We find two LAEs at $z=6.38$ and $6.44$ with line luminosities of L$_Ly\alpha 4.7 10^43$ erg s$^-1$, putting them among the brightest LAEs discovered at these redshifts. Taking advantage of the broad spectral coverage of WISP, we are able to rule out almost all lower-redshift contaminants. The WISP LAEs have a high number density of $7.7\times10^-6$ Mpc$^-3$. We argue that the LAEs reside in Mpc-scale ionized bubbles that allow the Lyman-alpha photons to redshift out of resonance before encountering the neutral IGM. We discuss possible ionizing sources and conclude that the observed LAEs alone are not sufficient to ionize the bubbles.

@misc{bagley2017space, abstract = {We present the results of a systematic search for Lyman-alpha emitters (LAEs) at $6 \lesssim z \lesssim 7.6$ using the HST WFC3 Infrared Spectroscopic Parallel (WISP) Survey. Our total volume over this redshift range is $\sim 8 \times10^5$ Mpc$^3$, comparable to many of the narrowband surveys despite their larger area coverage. We find two LAEs at $z=6.38$ and $6.44$ with line luminosities of L$_{\mathrm{Ly}\alpha} \sim 4.7 \times 10^{43}$ erg s$^{-1}$, putting them among the brightest LAEs discovered at these redshifts. Taking advantage of the broad spectral coverage of WISP, we are able to rule out almost all lower-redshift contaminants. The WISP LAEs have a high number density of $7.7\times10^{-6}$ Mpc$^{-3}$. We argue that the LAEs reside in Mpc-scale ionized bubbles that allow the Lyman-alpha photons to redshift out of resonance before encountering the neutral IGM. We discuss possible ionizing sources and conclude that the observed LAEs alone are not sufficient to ionize the bubbles.}, added-at = {2017-01-20T10:06:24.000+0100}, author = {Bagley, Micaela B. and Scarlata, Claudia and Henry, Alaina and Rafelski, Marc and Malkan, Matthew and Teplitz, Harry and Dai, Y. Sophia and Baronchelli, Ivano and Colbert, James and Rutkowski, Michael and Mehta, Vihang and Dressler, Alan and McCarthy, Patrick and Bunker, Andrew and Atek, Hakim and Garel, Thibault and Martin, Crystal L. and Hathi, Nimish and Siana, Brian}, biburl = {https://www.bibsonomy.org/bibtex/27d8e1c71edf94c540142a3490933cb65/miki}, description = {[1701.05193] A High Space Density of Luminous Lyman Alpha Emitters at z~6.5}, interhash = {e2d8034b07f67e2cfba23f6ac7f381d9}, intrahash = {7d8e1c71edf94c540142a3490933cb65}, keywords = {LAE high redshift}, note = {cite arxiv:1701.05193Comment: Accepted for publication in ApJ. 20 pages, 13 figures}, timestamp = {2017-01-20T10:06:24.000+0100}, title = {A High Space Density of Luminous Lyman Alpha Emitters at z~6.5}, url = {http://arxiv.org/abs/1701.05193}, year = 2017 }