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|Title:||SDSS-IV MaNGA: Inside-out versus Outside-in Quenching of Galaxies in Different Local Environments||Authors:||Lin, Lihwai
Rembold, Sandro B.
Sánchez, Sebastián F.
BELFIORE, FRANCESCO MICHEL CONCETTO
|Issue Date:||2019||Journal:||THE ASTROPHYSICAL JOURNAL||Number:||872||Issue:||1||First Page:||50||Abstract:||The large Integral Field Spectroscopy surveys have allowed the classification of ionizing sources of emission lines on sub-kiloparsec scales. In this work, we define two non-parametric parameters, quiescence (F <SUB> q </SUB>) and its concentration (C <SUB> q </SUB>), to quantify the strength and the spatial distribution of the quenched areas, respectively, traced by the LI(N)ER regions with low EW(Hα). With these two measurements, we classify MaNGA galaxies into inside-out and outside-in quenching types according to their locations on the F <SUB> q </SUB> versus C <SUB> q </SUB> plane and we measure the fraction of inside-out (outside-in) quenching galaxies as a function of halo mass. We find that the fraction of galaxies showing inside-out quenching increases with halo mass, irrespective of stellar mass or galaxy type (satellites versus centrals). In addition, high-stellar-mass galaxies exhibit a greater fraction of inside-out quenching compared to low-stellar-mass ones in all environments. In contrast, the fraction of outside-in quenching does not depend on halo mass. Our results suggest that morphological quenching may be responsible for the inside-out quenching seen in all environments. On the other hand, the flat dependence of the outside-in quenching on halo mass could be a mixed result of ram pressure stripping and galaxy mergers. Nevertheless, for a given environment and stellar mass, the fraction of inside-out quenching is systematically greater than that of outside-in quenching, suggesting that inside-out quenching is the dominant quenching mode in all environments.||URI:||http://hdl.handle.net/20.500.12386/30683||URL:||https://iopscience.iop.org/article/10.3847/1538-4357/aafa84||ISSN:||0004-637X||DOI:||10.3847/1538-4357/aafa84||Bibcode ADS:||2019ApJ...872...50L||Fulltext:||open|
|Appears in Collections:||1.01 Articoli in rivista|
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checked on Jun 19, 2021
checked on Jun 19, 2021
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