%0 Generic %1 wagg2012emission %A Wagg, J. %A Wiklind, T. %A Carilli, C. L. %A Espada, D. %A Peck, A. %A Riechers, D. %A Walter, F. %A Wootten, A. %A Aravena, M. %A Barkats, D. %A Cortes, J. R. %A Hills, R. %A Hodge, J. %A Impellizzeri, C. M V. %A Iono, D. %A Leroy, A. %A Martin, S. %A Rawlings, M. G. %A Maiolino, R. %A McMahon, R. G. %A Scott, K. S. %A Villard, E. %A Vlahakis, C. %D 2012 %K [CII] emission high redshift %T CII line emission in massive star-forming galaxies at z=4.7 %U http://arxiv.org/abs/1205.3498 %X We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of the CII 157.7micron fine structure line and thermal dust continuum emission from a pair of gas-rich galaxies at z=4.7, BR1202-0725. This system consists of a luminous quasar host galaxy and a bright submm galaxy (SMG), while a fainter star-forming galaxy is also spatially coincident within a 4'' (25 kpc) region. All three galaxies are detected in the submm continuum, indicating FIR luminosities in excess of 10^13 Lsun for the two most luminous objects. The SMG and the quasar host galaxy are both detected in CII line emission with luminosities, L(CII) = (10.0 +/- 1.5)x10^9 Lsun and L(CII) = (6.5+/-1.0)x10^9 Lsun, respectively. We estimate a luminosity ratio, L(CII)/L(FIR) = (8.3+/-1.2)x10^-4 for the starburst SMG to the North, and L(CII)/L(FIR) = (2.5+/-0.4)x10^-4 for the quasar host galaxy, in agreement with previous high-redshift studies that suggest lower CII-to-FIR luminosity ratios in quasars than in starburst galaxies. The third fainter object with a flux density, S(340GHz) = 1.9+/-0.3 mJy, is coincident with a Ly-Alpha emitter and is detected in HST ACS F775W and F814W images but has no clear counterpart in the H-band. Even if this third companion does not lie at a similar redshift to BR1202-0725, the quasar and the SMG represent an overdensity of massive, infrared luminous star-forming galaxies within 1.3 Gyr of the Big Bang.

@misc{wagg2012emission, abstract = {We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of the [CII] 157.7micron fine structure line and thermal dust continuum emission from a pair of gas-rich galaxies at z=4.7, BR1202-0725. This system consists of a luminous quasar host galaxy and a bright submm galaxy (SMG), while a fainter star-forming galaxy is also spatially coincident within a 4'' (25 kpc) region. All three galaxies are detected in the submm continuum, indicating FIR luminosities in excess of 10^13 Lsun for the two most luminous objects. The SMG and the quasar host galaxy are both detected in [CII] line emission with luminosities, L([CII]) = (10.0 +/- 1.5)x10^9 Lsun and L([CII]) = (6.5+/-1.0)x10^9 Lsun, respectively. We estimate a luminosity ratio, L([CII])/L(FIR) = (8.3+/-1.2)x10^-4 for the starburst SMG to the North, and L([CII])/L(FIR) = (2.5+/-0.4)x10^-4 for the quasar host galaxy, in agreement with previous high-redshift studies that suggest lower [CII]-to-FIR luminosity ratios in quasars than in starburst galaxies. The third fainter object with a flux density, S(340GHz) = 1.9+/-0.3 mJy, is coincident with a Ly-Alpha emitter and is detected in HST ACS F775W and F814W images but has no clear counterpart in the H-band. Even if this third companion does not lie at a similar redshift to BR1202-0725, the quasar and the SMG represent an overdensity of massive, infrared luminous star-forming galaxies within 1.3 Gyr of the Big Bang.}, added-at = {2012-05-17T15:11:11.000+0200}, author = {Wagg, J. and Wiklind, T. and Carilli, C. L. and Espada, D. and Peck, A. and Riechers, D. and Walter, F. and Wootten, A. and Aravena, M. and Barkats, D. and Cortes, J. R. and Hills, R. and Hodge, J. and Impellizzeri, C. M V. and Iono, D. and Leroy, A. and Martin, S. and Rawlings, M. G. and Maiolino, R. and McMahon, R. G. and Scott, K. S. and Villard, E. and Vlahakis, C.}, biburl = {https://www.bibsonomy.org/bibtex/24c92c34caeb1758e2cf07baa70931792/miki}, description = {[1205.3498] [CII] line emission in massive star-forming galaxies at z=4.7}, interhash = {4e5ef57a0d3b48d4e2e6219846b2e078}, intrahash = {4c92c34caeb1758e2cf07baa70931792}, keywords = {[CII] emission high redshift}, note = {cite arxiv:1205.3498Comment: 14 pages, submitted to ApJ Letters}, timestamp = {2012-05-17T15:11:11.000+0200}, title = {[CII] line emission in massive star-forming galaxies at z=4.7}, url = {http://arxiv.org/abs/1205.3498}, year = 2012 }