%0 Generic %1 arabsalmani2017molecular %A Arabsalmani, M. %A Floc'h, E. Le %A Dannerbauer, H. %A Feruglio, C. %A Daddi, E. %A Charmandaris, V. %A Vergani, S. D. %A Japelj, J. %A Ciesla, L. %A Duc, P. A. %A Basa, S. %A Bournaud, F. %A Elbaz, D. %D 2017 %K gas grb molecular outflow %T A Molecular gas rich GRB host galaxy at the peak of cosmic star formation with significant outflowing gas %U http://arxiv.org/abs/1709.00424 %X We present the properties of molecular gas in the host galaxy of GRB 080207, located at $z$ = 2.086, based on the CO(32) emission line. We find this galaxy to be rich in molecular gas with a mass of $1.1 10^11 M_ødot$ and a molecular gas mass fraction of $\sim$0.5, typical of star forming galaxies with similar stellar masses and redshifts. With a $SFR_FIR$ of 260 $M_ødot yr^-1$, its molecular-gas-depletion timescale is 0.43 Gyr, which is near the peak of the depletion timescale distribution of the star-forming galaxies at similar redshifts. The molecular gas properties of the GRB host appears to follow the scaling relations of the general star-forming galaxy population with similar stellar masses, star formation rates, and redshifts, which is in contrast with the proposed molecular gas deficiency in GRB host galaxies. We also show that the H$\alpha$ emission line from the galaxy contains a narrow and a broad component, with an offset of 470 km/s from each other. The narrow component matches the CO emission well in the velocity space. The broad component, with a FWHM larger than 900 km/s, is associated with a significant and uncommonly strong outflow of gas from the galaxy.

@misc{arabsalmani2017molecular, abstract = {We present the properties of molecular gas in the host galaxy of GRB 080207, located at $z$ = 2.086, based on the CO(32) emission line. We find this galaxy to be rich in molecular gas with a mass of $1.1 \times 10^{11} M_{\odot}$ and a molecular gas mass fraction of $\sim$0.5, typical of star forming galaxies with similar stellar masses and redshifts. With a $\rm SFR_{FIR}$ of 260 $M_{\odot} \rm yr^{-1}$, its molecular-gas-depletion timescale is 0.43 Gyr, which is near the peak of the depletion timescale distribution of the star-forming galaxies at similar redshifts. The molecular gas properties of the GRB host appears to follow the scaling relations of the general star-forming galaxy population with similar stellar masses, star formation rates, and redshifts, which is in contrast with the proposed molecular gas deficiency in GRB host galaxies. We also show that the H$\alpha$ emission line from the galaxy contains a narrow and a broad component, with an offset of 470 km/s from each other. The narrow component matches the CO emission well in the velocity space. The broad component, with a FWHM larger than 900 km/s, is associated with a significant and uncommonly strong outflow of gas from the galaxy.}, added-at = {2017-09-05T11:20:49.000+0200}, author = {Arabsalmani, M. and Floc'h, E. Le and Dannerbauer, H. and Feruglio, C. and Daddi, E. and Charmandaris, V. and Vergani, S. D. and Japelj, J. and Ciesla, L. and Duc, P. A. and Basa, S. and Bournaud, F. and Elbaz, D.}, biburl = {https://www.bibsonomy.org/bibtex/222c7af5bb8f003affd78994ba9421c4f/miki}, description = {[1709.00424] A Molecular gas rich GRB host galaxy at the peak of cosmic star formation with significant outflowing gas}, interhash = {2eb4e3c48e0c6cbb1ea2657f101cd2eb}, intrahash = {22c7af5bb8f003affd78994ba9421c4f}, keywords = {gas grb molecular outflow}, note = {cite arxiv:1709.00424Comment: Submitted to MNRAS Letters}, timestamp = {2017-09-05T11:20:49.000+0200}, title = {A Molecular gas rich GRB host galaxy at the peak of cosmic star formation with significant outflowing gas}, url = {http://arxiv.org/abs/1709.00424}, year = 2017 }