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SDSS IV MaNGA: Inside-out quenching galaxies with Hα ring-like structures
  • Jiaxuan Li
Jiaxuan Li
Peking University

Corresponding Author:[email protected]

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Abstract

We investigate those galaxies with H\(\alpha\) emission ring-like structures with stellar mass in the range \(9<\log(M/M_{\odot})<12\) based on Mapping Nearby Galaxies at APO (MaNGA) survey. These galaxies are almost located in green valley on SFR-stellar mass plane. The radius of H\(\alpha\) rings are measured and a good linear relation between bar length and H\(\alpha\) ring radius are found. We reveal that the appearance of star-forming ring-like structure has a stronger correlation with bar-induced activities rather than with active galactic nuclei (AGN). A majority of our sample are galaxies which are classified as LINER with EW(H\(\alpha\))\(<3A\). Low luminosity AGN possibly plays a role in inside-out quenching which have H\(\alpha\) rings. Morphological quenching and bulge show less relation with H\(\alpha\) ring galaxies. This work might provide new ideas for researches on AGN feedback and bar-AGN relations.