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http://hdl.handle.net/20.500.12386/30683
Titolo: | SDSS-IV MaNGA: Inside-out versus Outside-in Quenching of Galaxies in Different Local Environments | Autori: | Lin, Lihwai Hsieh, Bau-Ching Pan, Hsi-An Rembold, Sandro B. Sánchez, Sebastián F. Argudo-Fernández, Maria Rowlands, Kate BELFIORE, FRANCESCO MICHEL CONCETTO Bizyaev, Dmitry Lacerna, Ivan Riffel, Rogréio Rong, Yu Yuan, Fangting Drory, Niv Maiolino, Roberto Wilcots, Eric |
Data pubblicazione: | 2019 | Rivista: | THE ASTROPHYSICAL JOURNAL | Numero: | 872 | Fascicolo: | 1 | Da pagina:: | 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 |
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