ALMA observations of a metal-rich damped Ly α absorber at z = 2.5832: evidence 
for strong galactic winds in a galaxy group

Fynbo, J. P. U.; Heintz, K. E.; Neeleman, M.; Christensen, L.; Dessauges-Zavadsky, M.; Kanekar, N.; Møller, P.; Prochaska, J. X.; Rhodin, N. H. P.; Zwaan, M.

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Journal Article

ALMA observations of a metal-rich damped Ly α absorber at z = 2.5832: evidence for strong galactic winds in a galaxy group

MPS-Authors

Fynbo, J. P. U.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Heintz, K. E.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Neeleman, M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Christensen, L.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Dessauges-Zavadsky, M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kanekar, N.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Møller, P.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Prochaska, J. X.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Rhodin, N. H. P.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Zwaan, M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

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https://ui.adsabs.harvard.edu/abs/2018MNRAS.479.2126F
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Citation

Fynbo, J. P. U., Heintz, K. E., Neeleman, M., Christensen, L., Dessauges-Zavadsky, M., Kanekar, N., et al. (2018). ALMA observations of a metal-rich damped Ly α absorber at z = 2.5832: evidence for strong galactic winds in a galaxy group. Monthly Notices of the Royal Astronomical Society, 479, 2126-2132.

Cite as: https://hdl.handle.net/21.11116/0000-0005-CDAC-3

Abstract

We report on the results of a search for CO(3-2) emission from the galaxy counterpart of a high-metallicity Damped Ly α Absorber (DLA) at z = 2.5832 towards the quasar Q0918+1636. We do not detect CO emission from the previously identified DLA galaxy counterpart. The limit we infer on M_gas/M_⋆ is in the low end of the range found for DLA galaxies, but is still consistent with what is found for other star-forming galaxies at similar redshifts. Instead we detect CO(3-2) emission from another intensely star-forming galaxy at an impact parameter of 117 kpc from the line of sight to the quasar and 131 km s^-1 redshifted relative to the velocity centroid of the DLA in the quasar spectrum. In the velocity profile of the low- and high- ionization absorption lines of the DLA there is an absorption component consistent with the redshift of this CO-emitting galaxy. It is plausible that this component is physically associated with a strong outflow in the plane of the sky from the CO-emitting galaxy. If true, this would be further evidence, in addition to what is already known from studies of Lyman-break galaxies, that galactic outflows can be traced beyond 100 kpc from star-forming galaxies. The case of this z = 2.583 structure is an illustration of this in a group environment.