%0 Generic %1 friis2014excited %A Friis, M. %A De Cia, A. %A Krühler, T. %A Fynbo, J. P. U. %A Ledoux, C. %A Vreeswijk, P. M. %A Malesani, D. %A Gorosabel, J. %A Starling, R. L. C. %A Jakobsson, P. %A Varela, K. %A Watson, D. J. %A Wiersema, K. %A Drachmann, A. P. %A Trotter, A. %A Thöne, C. C. %A Postigo, A. de Ugarte %A D'Elia, V. %A Elliott, J. %A Maturi, M. %A Goldoni, P. %A Greiner, J. %A Haislip, J. %A Kaper, L. %A Knust, F. %A LaCluyze, A. %A Milvang-Jensen, B. %A Reichart, D. %A Schulze, S. %A Sudilovsky, V. %A Vergani, S. D. %D 2014 %K gas grb host molecular %T The warm, the excited, and the molecular gas: GRB 121024A shining through its star-forming galaxy %U http://arxiv.org/abs/1409.6315 %X We present the first reported case of the simultaneous metallicity determination of a gamma-ray burst (GRB) host galaxy, from both afterglow absorption lines as well as strong emission-line diagnostics. Using spectroscopic and imaging observations of the afterglow and host of the long-duration GRB121024A at z = 2.30, we give one of the most complete views of a GRB host/environment to date. We observe a strong damped Ly-alpha absorber (DLA) with a hydrogen column density of log N(HI) = 21.80+/-0.15, H_2 absorption in the Lyman-Werner bands (molecular fraction of log(f) ~ -1.4; fourth solid detection of molecular hydrogen in a GRB-DLA), the nebular emission lines H-alpha, H-beta, OII, OIII and NII, as well as a large variety of metal absorption lines. We find a GRB host galaxy that is highly star-forming (SFR ~ 40 Msolar/yr), with a dust-corrected metallicity along the line of sight of Zn/Hcorr = -0.5+/-0.2 (O/H ~ -0.3 from emission lines), and a depletion factor of refractory elements of Zn/Fe = 0.85+/-0.04. The molecular gas is separated by 400 km/s from the gas that is excited by the GRB (implying a fairly massive host, in agreement with the derived stellar mass of log(Mstellar/Msolar) = 9.9+/-0.2). Including emission line analysis, we isolate and characterise three different gas-phases within the star-forming host galaxy. Our main result is that the metallicity determinations from both absorption and emission lines are consistent, which is encouraging for the comparison of GRB host metallicities at different redshifts.

@misc{friis2014excited, abstract = {We present the first reported case of the simultaneous metallicity determination of a gamma-ray burst (GRB) host galaxy, from both afterglow absorption lines as well as strong emission-line diagnostics. Using spectroscopic and imaging observations of the afterglow and host of the long-duration GRB121024A at z = 2.30, we give one of the most complete views of a GRB host/environment to date. We observe a strong damped Ly-alpha absorber (DLA) with a hydrogen column density of log N(HI) = 21.80+/-0.15, H_2 absorption in the Lyman-Werner bands (molecular fraction of log(f) ~ -1.4; fourth solid detection of molecular hydrogen in a GRB-DLA), the nebular emission lines H-alpha, H-beta, [OII], [OIII] and [NII], as well as a large variety of metal absorption lines. We find a GRB host galaxy that is highly star-forming (SFR ~ 40 Msolar/yr), with a dust-corrected metallicity along the line of sight of [Zn/H]corr = -0.5+/-0.2 ([O/H] ~ -0.3 from emission lines), and a depletion factor of refractory elements of [Zn/Fe] = 0.85+/-0.04. The molecular gas is separated by 400 km/s from the gas that is excited by the GRB (implying a fairly massive host, in agreement with the derived stellar mass of log(Mstellar/Msolar) = 9.9+/-0.2). Including emission line analysis, we isolate and characterise three different gas-phases within the star-forming host galaxy. Our main result is that the metallicity determinations from both absorption and emission lines are consistent, which is encouraging for the comparison of GRB host metallicities at different redshifts.}, added-at = {2014-09-24T10:05:30.000+0200}, author = {Friis, M. and De Cia, A. and Krühler, T. and Fynbo, J. P. U. and Ledoux, C. and Vreeswijk, P. M. and Malesani, D. and Gorosabel, J. and Starling, R. L. C. and Jakobsson, P. and Varela, K. and Watson, D. J. and Wiersema, K. and Drachmann, A. P. and Trotter, A. and Thöne, C. C. and Postigo, A. de Ugarte and D'Elia, V. and Elliott, J. and Maturi, M. and Goldoni, P. and Greiner, J. and Haislip, J. and Kaper, L. and Knust, F. and LaCluyze, A. and Milvang-Jensen, B. and Reichart, D. and Schulze, S. and Sudilovsky, V. and Vergani, S. D.}, biburl = {https://www.bibsonomy.org/bibtex/23df0108559c031b3e5918b5b979640ba/miki}, description = {[1409.6315] The warm, the excited, and the molecular gas: GRB 121024A shining through its star-forming galaxy}, interhash = {ffa2ee522dbbcae1b122fc48d09f56ce}, intrahash = {3df0108559c031b3e5918b5b979640ba}, keywords = {gas grb host molecular}, note = {cite arxiv:1409.6315Comment: 18 pages, 9 figures, resubmitted to MNRAS after taking into account comments from an anonymous referee}, timestamp = {2014-09-24T10:05:30.000+0200}, title = {The warm, the excited, and the molecular gas: GRB 121024A shining through its star-forming galaxy}, url = {http://arxiv.org/abs/1409.6315}, year = 2014 }