Rights statement: This is an author-created, un-copyedited version of an article accepted for publication/published in The Astrophysical Journal. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at doi:10.3847/0004-637X/832/2/182
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Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
| Article number | 182 |
|---|---|
| <mark>Journal publication date</mark> | 1/12/2016 |
| <mark>Journal</mark> | The Astrophysical Journal |
| Issue number | 2 |
| Volume | 832 |
| Number of pages | 10 |
| Publication Status | Published |
| Early online date | 30/11/16 |
| <mark>Original language</mark> | English |
The nature of warm, ionized gas outside of galaxies may illuminate several key galaxy evolutionary processes. A serendipitous observation by the MaNGA survey has revealed a large, asymmetric H alpha complex with no optical counterpart that extends approximate to 8 '' (approximate to 6.3 kpc) beyond the effective radius of a dusty, starbursting galaxy. This H alpha extension is approximately three times the effective radius of the host galaxy and displays a tail-like morphology. We analyze its gas- phase metallicities, gaseous kinematics, and emission- line ratios and discuss whether this Ha extension could be diffuse ionized gas, a gas accretion event, or something else. We find that this warm, ionized gas structure is most consistent with gas accretion through recycled wind material, which could be an important process that regulates the low- mass end of the galaxy stellar mass function.