The first positive detection of molecular gas in a GRB host galaxy

  title={The first positive detection of molecular gas in a GRB host galaxy},
  author={J. Prochaska and Y. Sheffer and D. Perley and J. Bloom and L. Lopez and M. Dessauges-Zavadsky and H.-W. Chen and A. Filippenko and M. Ganeshalingam and W. Li and A. Miller and D. S. U. S. Cruz and UCOLick and U. Toledo and U. Berkeley and Obs. Geneve and U. Chicago and Las Cumbres Observatory},
  journal={The Astrophysical Journal},
We report on strong H2 and CO absorption from gas within the host galaxy of gamma-ray burst (GRB) 080607. Analysis of our Keck/LRIS afterglow spectrum reveals a very large H I column density () and strong metal-line absorption at z GRB = 3.0363 with a roughly solar metallicity. We detect a series of A - X bandheads from CO and estimate N(CO) = 10 16.50.3 cm-2 and T COex > 100 K. We argue that the high excitation temperature results from UV pumping of the CO gas by the GRB afterglow. Similarly… Expand

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