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2011MNRAS.412.1559N - Mon. Not. R. Astron. Soc., 412, 1559-1572 (2011/April-2)
Large-scale outflows from z ≃ 0.7 starburst galaxies identified via ultrastrong Mg II quasar absorption lines.
NESTOR D.B., JOHNSON B.D., WILD V., MENARD B., TURNSHEK D.A., RAO S. and PETTINI M.
Abstract (from CDS):
Each field contains two bright emission-line galaxies at similar redshift (Δv ≲ 300 km/s) to that of the absorption. Lower limits on their instantaneous star formation rates (SFRs) from the observed [O II] and Hβ line fluxes, and stellar masses from spectral template fitting indicate specific SFRs among the highest for their masses at these redshifts. Additionally, their 4000-Å break and Balmer absorption strengths imply they have undergone recent (∼0.01-1 Gyr) starbursts. The concomitant presence of two rare phenomena - starbursts and USMg II absorbers - strongly implies a causal connection. We consider these data and USMg II absorbers in general in the context of various popular models, and conclude that galactic outflows are generally necessary to account for the velocity extent of the absorption. We favour starburst-driven outflows over tidally stripped gas from a major interaction, which triggered the starburst as the energy source for the majority of systems. Finally, we discuss the implications of these results and speculate on the overall contribution of such systems to the global SFR density at z ≃ 0.7. Properties of the nuclei and comae of 10 ecliptic comets from Hubble Space Telescope multi-orbit observations
Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS
Journal keyword(s): ISM: jets and outflows - intergalactic medium - quasars: absorption lines - galaxies: starburst
Nomenclature: Figs 1 and 3, Tables 1 and 3: [NJW2011] QHHMM+DDM NN N=10+5. Text, Tables 2 and 4: [NJW2011] GHH-NN (Nos G07-1 to G07-2, G14-1 to G14-2).
Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.
Simbad objects: 5
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