%0 Generic %1 yang2019emission %A Yang, C. %A Gavazzi, R. %A Beelen, A. %A Cox, P. %A Omont, A. %A Lehnert, M. D. %A Gao, Y. %A Ivison, R. J. %A Swinbank, A. M. %A Barcos-Muñoz, L. %A Neri, R. %A Cooray, A. %A Dye, S. %A Eales, S. %A Fu, H. %A González-Alfonso, E. %A Ibar, E. %A Michałowski, M. J. %A Nayyeri, H. %A Negrello, M. %A Nightingale, J. %A Pérez-Fournon, I. %A Riechers, D. A. %A Smail, I. %A van der Werf, P. %D 2019 %K high-z merger molecular-gas %T CO, H2O, H2O+ line and dust emission in a z = 3.63 strongly lensed starburst merger at sub-kiloparsec scales %U http://arxiv.org/abs/1903.00273 %X Using ALMA, we report high angular-resolution observations of the redshift z=3.63 galaxy, G09v1.97, one of the most luminous strongly lensed galaxies discovered by the H-ATLAS survey. We present 0"2-0"4 resolution images of the rest-frame 188 and 419$\mu$m dust continuum and the CO(6-5), H2O(211-202) and J=2 H2O+ line emission. We also report the detection of H$_2^18$O in this source. The dust continuum and molecular gas emission are resolved into a nearly complete ~1"5 diameter Einstein ring plus a weaker image in the center, which is caused by a special dual deflector lensing configuration. The observed line profiles of the CO, H2O and H2O+ lines are strikingly similar. In the source plane, we reconstruct the dust continuum images and the spectral cubes of the line emission at sub-kpc scales. The reconstructed dust emission in the source plane is dominated by a compact disk with an effective radius of 0.7kpc plus an overlapping extended disk with a radius twice as large. While the average magnification for the dust continuum is $\mu$~10-11, the magnification of the line emission varies 5 to 22 across different velocity components. The emission lines have similar spatial and kinematic distributions. The molecular gas and dust content reveal that G09v1.97 is a gas-rich major merger in its pre-coalescence phase. Both of the merging companions are intrinsically ULIRGs with LIR reaching $4\times10^12L_ødot$, and the total LIR of G09v1.97 is $1.4\times10^13L_ødot$. The approaching southern galaxy shows no obvious kinematic structure with a semi-major half-light radius a_s=0.4kpc, while the receding galaxy resembles an a_s=1.2kpc rotating disk. The two galaxies are separated by a projected distance of 1.3kpc, bridged by weak line emission that is co-spatially located with the cold-dust-emission peak, suggesting a large amount of cold ISM in the interacting region. (abridged)

@misc{yang2019emission, abstract = {Using ALMA, we report high angular-resolution observations of the redshift z=3.63 galaxy, G09v1.97, one of the most luminous strongly lensed galaxies discovered by the H-ATLAS survey. We present 0"2-0"4 resolution images of the rest-frame 188 and 419$\mu$m dust continuum and the CO(6-5), H2O(211-202) and J=2 H2O+ line emission. We also report the detection of H$_2^{18}$O in this source. The dust continuum and molecular gas emission are resolved into a nearly complete ~1"5 diameter Einstein ring plus a weaker image in the center, which is caused by a special dual deflector lensing configuration. The observed line profiles of the CO, H2O and H2O+ lines are strikingly similar. In the source plane, we reconstruct the dust continuum images and the spectral cubes of the line emission at sub-kpc scales. The reconstructed dust emission in the source plane is dominated by a compact disk with an effective radius of 0.7kpc plus an overlapping extended disk with a radius twice as large. While the average magnification for the dust continuum is $\mu$~10-11, the magnification of the line emission varies 5 to 22 across different velocity components. The emission lines have similar spatial and kinematic distributions. The molecular gas and dust content reveal that G09v1.97 is a gas-rich major merger in its pre-coalescence phase. Both of the merging companions are intrinsically ULIRGs with LIR reaching $\gtrsim 4\times10^{12}L_\odot$, and the total LIR of G09v1.97 is $1.4\times10^{13}L_\odot$. The approaching southern galaxy shows no obvious kinematic structure with a semi-major half-light radius a_s=0.4kpc, while the receding galaxy resembles an a_s=1.2kpc rotating disk. The two galaxies are separated by a projected distance of 1.3kpc, bridged by weak line emission that is co-spatially located with the cold-dust-emission peak, suggesting a large amount of cold ISM in the interacting region. (abridged)}, added-at = {2019-03-04T15:32:53.000+0100}, author = {Yang, C. and Gavazzi, R. and Beelen, A. and Cox, P. and Omont, A. and Lehnert, M. D. and Gao, Y. and Ivison, R. J. and Swinbank, A. M. and Barcos-Muñoz, L. and Neri, R. and Cooray, A. and Dye, S. and Eales, S. and Fu, H. and González-Alfonso, E. and Ibar, E. and Michałowski, M. J. and Nayyeri, H. and Negrello, M. and Nightingale, J. and Pérez-Fournon, I. and Riechers, D. A. and Smail, I. and van der Werf, P.}, biburl = {https://www.bibsonomy.org/bibtex/26c880d687184142b48b4e49b5362a06e/heh15}, description = {CO, H2O, H2O line and dust emission in a z = 3.63 strongly lensed starburst merger at sub-kiloparsec scales}, interhash = {42d05b492e267a3b62c04bcd3533dbbc}, intrahash = {6c880d687184142b48b4e49b5362a06e}, keywords = {high-z merger molecular-gas}, note = {cite arxiv:1903.00273Comment: A&A accepted, 23 pages}, timestamp = {2019-03-04T15:32:53.000+0100}, title = {CO, H2O, H2O+ line and dust emission in a z = 3.63 strongly lensed starburst merger at sub-kiloparsec scales}, url = {http://arxiv.org/abs/1903.00273}, year = 2019 }