@article { , title = {The molecular-gas properties in the gravitationally lensed merger HATLAS J142935.3-002836}, abstract = {Follow-up observations of (sub-)mm-selected gravitationally-lensed systems have allowed a more detailed study of the dust-enshrouded phase of star-formation up to very early cosmic times. Here, the case of the gravitationally lensed merger in HATLAS J142935.3-002836 (also known as H1429-0028; z\_lens=0.218, z\_bkg=1.027) is revisited following recent developments in the literature and new APEX observations targeting two carbon monoxide (CO) rotational transitions J\_up=3 and 6. We show that the line-profiles comprise three distinct velocity components, where the fainter high-velocity one is less magnified and more compact. The modelling of the observed spectral line energy distribution of CO J\_up=2 to 6 and [CI]3P\_1-3P\_0 assumes a large velocity gradient scenario, where the analysis is based on four statistical approaches. Since the detected gas and dust emission comes exclusively from only one of the two merging components (the one oriented North-South, NS), we are only able to determine upper-limits for the companion. The molecular gas in the NS component in H1429-0028 is found to have a temperature of ~70K, a volume density of log(n[/cm3])~3.7, to be expanding at ~10km/s/pc, and amounts to M\_H2=4(-2,+3)*1e9 Msun. The CO to H2 conversion factor is estimated to be alpha\_CO=0.4(-0.2,+0.3) Msun/(K.km/s.pc2). The NS galaxy is expected to have a factor of >10x more gas than its companion (M\_H2}, doi = {10.1093/mnras/stz945}, eissn = {1365-2966}, issn = {0035-8711}, issue = {2}, journal = {Monthly Notices of the Royal Astronomical Society}, note = {Article not yet published online. On temp embargo sheet. Will need to change status to published. Will need to add official url, volume, issue, pagination and doi. Can replace submitted version with published version when available. No embargo but must link to published version. Will need to add set statement "This article has been accepted for publication in [Journal Title] ©: [year] [owner as specified on the article] Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved" KJB 25.04.2019}, pages = {2366-2378}, publicationstatus = {Published}, publisher = {Oxford University Press}, url = {https://nottingham-repository.worktribe.com/output/1829658}, volume = {486}, keyword = {Gravitational lensing: strong, Galaxies: interactions, Submillimeter: galaxies, Submillimeter: ISM, Abundances}, year = {2019}, author = {Messias, Hugo and Nagar, Neil and Zhang, Zhi-Yu and Oteo, Iván and Dye, Simon and Ibar, Eduardo and Timmons, Nicholas and Van Der Werf, Paul and Riechers, Dominik and Eales, Stephen and Ivison, Rob and Maresca, Jacob and Michalowski, J. and Yang, Chentao} }