%0 Generic %1 banados2015bright %A Bañados, E. %A Decarli, R. %A Walter, F. %A Venemans, B. P. %A Farina, E. P. %A Fan, X. %D 2015 %K bright cii emission high-z qso %T Bright CII 158$\mu$m emission in a quasar host galaxy at $z=6.54$ %U http://arxiv.org/abs/1504.05216 %X The CII 158$\mu$m fine-structure line is known to trace regions of active star formation and is the main coolant of the cold, neutral atomic medium. In this Letter, we report a strong detection of the CII line in the host galaxy of the brightest quasar known at $z>6.5$, the Pan-STARRS1 selected quasar PSO J036.5078+03.0498 (hereafter P036+03), using the IRAM NOEMA millimeter interferometer. Its CII and total far-infrared luminosities are $(5.8 0.7) 10^9 \,L_ødot$ and $(7.6\pm1.5) \times 10^12\,L_ødot$, respectively. This results in a $L_CII /L_TIR$ ratio of $0.810^-3$, which is at the high end for those found for active galaxies, though it is lower than the average found in typical main sequence galaxies at $z0$. We also report a tentative additional line which we identify as a blended emission from the $3_22 - 3_13$ and $5_23 - 4_32$ H$_2$O transitions. If confirmed, this would be the most distant detection of water emission to date. P036+03 rivals the current prototypical luminous J1148+5251 quasar at $z=6.42$, in both rest-frame UV and CII luminosities. Given its brightness and because it is visible from both hemispheres (unlike J1148+5251), P036+03 has the potential of becoming an important laboratory for the study of star formation and of the interstellar medium only $800\,$Myr after the Big Bang.

@misc{banados2015bright, abstract = {The [CII] 158$\mu$m fine-structure line is known to trace regions of active star formation and is the main coolant of the cold, neutral atomic medium. In this \textit{Letter}, we report a strong detection of the [CII] line in the host galaxy of the brightest quasar known at $z>6.5$, the Pan-STARRS1 selected quasar PSO J036.5078+03.0498 (hereafter P036+03), using the IRAM NOEMA millimeter interferometer. Its [CII] and total far-infrared luminosities are $(5.8 \pm 0.7) \times 10^9 \,L_\odot$ and $(7.6\pm1.5) \times 10^{12}\,L_\odot$, respectively. This results in a $L_{[CII]} /L_{TIR}$ ratio of $\sim 0.8\times 10^{-3}$, which is at the high end for those found for active galaxies, though it is lower than the average found in typical main sequence galaxies at $z\sim 0$. We also report a tentative additional line which we identify as a blended emission from the $3_{22} - 3_{13}$ and $5_{23} - 4_{32}$ H$_2$O transitions. If confirmed, this would be the most distant detection of water emission to date. P036+03 rivals the current prototypical luminous J1148+5251 quasar at $z=6.42$, in both rest-frame UV and [CII] luminosities. Given its brightness and because it is visible from both hemispheres (unlike J1148+5251), P036+03 has the potential of becoming an important laboratory for the study of star formation and of the interstellar medium only $\sim 800\,$Myr after the Big Bang.}, added-at = {2015-04-22T09:51:07.000+0200}, author = {Bañados, E. and Decarli, R. and Walter, F. and Venemans, B. P. and Farina, E. P. and Fan, X.}, biburl = {https://www.bibsonomy.org/bibtex/21de951f4f98f84600bb47c4ad339b011/miki}, description = {[1504.05216] Bright [CII] 158$\mu$m emission in a quasar host galaxy at $z=6.54$}, interhash = {c5416958f4fb904038c15051b148bd97}, intrahash = {1de951f4f98f84600bb47c4ad339b011}, keywords = {bright cii emission high-z qso}, note = {cite arxiv:1504.05216Comment: Accepted for publication in ApJ Letters}, timestamp = {2015-04-22T09:51:07.000+0200}, title = {Bright [CII] 158$\mu$m emission in a quasar host galaxy at $z=6.54$}, url = {http://arxiv.org/abs/1504.05216}, year = 2015 }