SDSS-IV MaNGA: evidence of the importance of AGN feedback in low-mass galaxies
| Autor: | Kevin Bundy, Mariarosa Marinelli, Sandro Barboza Rembold, Samantha J. Penny, Coleman Krawczyk, Niv Drory, Robert C. Nichol, Kaike Pan, Rogemar A. Riffel, Gabriele da Silva Ilha, Daniel Oravetz, Karen L. Masters, Dominika Wylezalek, C. T. Liu, Dmitry Bizyaev, Rebecca Smethurst, Olivia A. Greene, Brett H. Andrews |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
dwarf [galaxies] 010308 nuclear & particles physics Star formation Spatially resolved Astronomy and Astrophysics Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences Astrophysics - Astrophysics of Galaxies Galaxy Stars Space and Planetary Science 0103 physical sciences active [galaxies] kinematics and dynamics [galaxies] Astrophysics::Solar and Stellar Astrophysics Spectroscopy Low Mass 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics evolution [galaxies] Dwarf galaxy |
| Zdroj: | Penny, S J, Masters, K L, Smethurst, R, Nichol, R C, Krawczyk, C M, Bizyaev, D, Greene, O, Liu, C, Marinelli, M, Rembold, S B, Riffel, R A, Da Silva Ilha, G, Wylezalek, D, Andrews, B H, Bundy, K, Drory, N, Oravetz, D & Pan, K 2018, ' SDSS-IV MaNGA: evidence of the importance of AGN feedback in low-mass galaxies ', Monthly Notices of the Royal Astronomical Society, vol. 476, no. 1, pp. 979-998 . https://doi.org/10.1093/mnras/sty202 |
| Popis: | We present new evidence for AGN feedback in a subset of 69 quenched low-mass galaxies ($M_{\star} \lesssim 5\times10^{9}$ M$_{\odot}$, $M_{\rm{r}} > -19$) selected from the first two years of the SDSS-IV MaNGA survey. The majority (85 per cent) of these quenched galaxies appear to reside in a group environment. We find 6 galaxies in our sample that appear to have an active AGN that is preventing on-going star-formation; this is the first time such a feedback mechanism has been observed in this mass range. Interestingly, five of these six galaxies have an ionised gas component that is kinematically offset from their stellar component, suggesting the gas is either recently accreted or outflowing. We hypothesise these six galaxies are low-mass equivalents to the "red geysers" observed in more massive galaxies. Of the other 63 galaxies in the sample, we find 8 do appear for have some low-level, residual star formation, or emission from hot, evolved stars. The remaining galaxies in our sample have no detectable ionised gas emission throughout their structures, consistent with them being quenched. This work shows the potential for understanding the detailed physical properties of dwarf galaxies through spatially resolved spectroscopy. Comment: 20 pages, 11 figures, accepted for publication in MNRAS |
| Databáze: | OpenAIRE |
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