%0 Generic %1 bradac2016detection %A Bradač, Maruša %A Garcia-Appadoo, Diego %A Huang, Kuang-Han %A Vallini, Livia %A Finney, Emily %A Hoag, Austin %A Lemaux, Brian %A Schmidt, Kasper %A Treu, Tommaso %A Carilli, Chris %A Dijkstra, Mark %A Ferrara, Andrea %A Fontana, Adriano %A Jones, Tucker %A Ryan, Russell %A Wagg, Jeff %D 2016 %K [CII] alma high-z %T ALMA CII detection of a redshift 7 lensed galaxy behind RXJ1347.1-1145 %U http://arxiv.org/abs/1610.02099 %X We present the results of ALMA spectroscopic follow-up of a $z=6.765$ Lyman-$\alpha$ emitting galaxy behind the cluster RXJ1347-1145. We report the detection of \ctf line fully consistent with the Lyman-$\alpha$ redshift and with the peak of the optical emission. Given the magnification of $\mu=5.0 \pm 0.3$ the intrinsic (corrected for lensing) luminosity of the CII line is $L_CII =1.4^+0.2_-0.3 10^7L_ødot$, which is $\sim5$ times fainter than other detections of $z7$ galaxies. The result indicates that low $L_CII$ in $z7$ galaxies compared to the local counterparts are likely caused by their low metallicities and/or feedback. The small velocity off-set ($\Delta v = 20_-40^+140km/s$) between the Lyman-$\alpha$ and CII line is unusual, and may be indicative of ionizing photons escaping.

@misc{bradac2016detection, abstract = {We present the results of ALMA spectroscopic follow-up of a $z=6.765$ Lyman-$\alpha$ emitting galaxy behind the cluster RXJ1347-1145. We report the detection of {\ctf} line fully consistent with the Lyman-$\alpha$ redshift and with the peak of the optical emission. Given the magnification of $\mu=5.0 \pm 0.3$ the intrinsic (corrected for lensing) luminosity of the [CII] line is $L_{[CII]} =1.4^{+0.2}_{-0.3} \times 10^7L_{\odot}$, which is ${\sim}5$ times fainter than other detections of $z\sim 7$ galaxies. The result indicates that low $L_{[CII]}$ in $z\sim 7$ galaxies compared to the local counterparts are likely caused by their low metallicities and/or feedback. The small velocity off-set ($\Delta v = 20_{-40}^{+140}\mbox{km/s}$) between the Lyman-$\alpha$ and [CII] line is unusual, and may be indicative of ionizing photons escaping.}, added-at = {2016-10-10T09:48:23.000+0200}, author = {Bradač, Maruša and Garcia-Appadoo, Diego and Huang, Kuang-Han and Vallini, Livia and Finney, Emily and Hoag, Austin and Lemaux, Brian and Schmidt, Kasper and Treu, Tommaso and Carilli, Chris and Dijkstra, Mark and Ferrara, Andrea and Fontana, Adriano and Jones, Tucker and Ryan, Russell and Wagg, Jeff}, biburl = {https://www.bibsonomy.org/bibtex/20e82fd3bdc90eb1f8a0b2d7d2bca47d7/miki}, description = {[1610.02099] ALMA [CII] detection of a redshift 7 lensed galaxy behind RXJ1347.1-1145}, interhash = {59f7fee0c092db74e1497a69b955a573}, intrahash = {0e82fd3bdc90eb1f8a0b2d7d2bca47d7}, keywords = {[CII] alma high-z}, note = {cite arxiv:1610.02099Comment: Submitted for publication to ApJLetters}, timestamp = {2016-10-10T09:48:23.000+0200}, title = {ALMA [CII] detection of a redshift 7 lensed galaxy behind RXJ1347.1-1145}, url = {http://arxiv.org/abs/1610.02099}, year = 2016 }