Papers › The DUVET Survey: Resolved Maps of Star Formation Driven Outflows in a Compact,...
The DUVET Survey: Resolved Maps of Star Formation Driven Outflows in a Compact, Starbursting Disk Galaxy
Bronwyn Reichardt Chu, Deanne B. Fisher, Nikole M. Nielsen, John Chisholm, Marianne Girard, Glenn G. Kacprzak, Alberto Bolatto, Rodrigo Herrara-Camus, Karin Sandstrom, Miao Li, Ryan Rickards Vaught, Daniel K. McPherson
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We study star formation driven outflows in a z∼0.02 starbursting disk galaxy, IRAS08339+6517, using spatially resolved measurements from the Keck Cosmic Web Imager (KCWI). We develop a new method incorporating a multi-step process to determine whether an outflow should be fit in each spaxel, and then subsequently decompose the emission line into multiple components. We detect outflows ranging in velocity, vₒᵤₜ, from 100-600 km s⁻¹ across a range of star formation rate surface densities, Σ_(SFR), from ∼0.01-10 M_⊙ yr⁻¹ kpc⁻² in resolution elements of a few hundred parsec. Outflows are detected in ∼100% of all spaxels within the half-light radius, and ∼70% within r₉₀, suggestive of a high covering fraction for this starbursting disk galaxy. Around 2/3 of the total outflowing mass originates from the star forming ring, which corresponds to <10% of the total area of the galaxy. We find that the relationship between vₒᵤₜ and the Σ_(SFR), as well as between the mass loading factor, η, and the Σ_(SFR), are consistent with trends expected from energy-driven feedback models. We study the resolution effects on this relationship and find stronger correlations above a re-binned size-scale of ∼500 pc. Conversely, we do not find statistically significant consistency with the prediction from momentum-driven winds.
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