The DUVET Survey: Resolved maps of star formation-driven outflows in a compact, starbursting disc galaxy. Issue 4 (25th February 2022)

• Record Type: Journal Article
• Authors: Reichardt Chu, Bronwyn; Fisher, Deanne B; Nielsen, Nikole M; Chisholm, John; Girard, Marianne; Kacprzak, Glenn G; Bolatto, Alberto; Herrera-Camus, Rodrigo; Sandstrom, Karin; Li, Miao; Rickards Vaught, Ryan; McPherson, Daniel K
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 511:Issue 4(2022)
• Page Start: 5782
• Page End: 5796
• Publication Date: 2022-02-25
• Subjects: galaxies: evolution -- galaxies: ISM -- galaxies: star formation -- galaxies: starburst -- galaxies: individual: IRAS08339+6517; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/stac420
• Languages: English
• ISSNs: 0035-8711

Abstract

ABSTRACT: We study star formation-driven outflows in a z ∼ 0.02 starbursting disc galaxy, IRAS08339+6517, using spatially resolved measurements from the Keck Cosmic Web Imager (KCWI). We develop a new method incorporating a multistep 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, v out, from 100 to 600 km s −1 across a range of star formation rate surface densities, ΣSFR, from ∼0.01 to 10 M⊙ yr −1 kpc −2 in resolution elements of a few hundred parsec. Outflows are detected in ∼100 per cent of all spaxels within the half-light radius, and ∼70 per cent within r 90, suggestive of a high covering fraction for this starbursting disc galaxy. Around 2/3 of the total outflowing mass originates from the star forming ring, which corresponds to ${\lt}10{{\ \rm per\ cent}}$ of the total area of the galaxy. We find that the relationship between v out and the ΣSFR, as well as between the mass loading factor, η, and the ΣSFR, 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.