Repository logo

How do central and satellite galaxies quench? - Insights from spatially resolved spectroscopy in the MaNGA survey

Accepted version



Change log


Bluck, AFL 
Piotrowska, JM 
Trussler, J 
Ellison, SL 


We investigate how star formation quenching proceeds within central and satellite galaxies using spatially resolved spectroscopy from the SDSS-IV MaNGA DR15. We adopt a complete sample of star formation rate surface densities (ΣSFR), derived in Bluck et al. (2020), to compute the distance at which each spaxel resides from the resolved star forming main sequence (ΣSFRΣ relation): ΔΣSFR. We study galaxy radial profiles in ΔΣSFR, and luminosity weighted stellar age (AgeL), split by a variety of intrinsic and environmental parameters. Via several statistical analyses, we establish that the quenching of central galaxies is governed by intrinsic parameters, with central velocity dispersion (σc) being the most important single parameter. High mass satellites quench in a very similar manner to centrals. Conversely, low mass satellite quenching is governed primarily by environmental parameters, with local galaxy over-density (δ5) being the most important single parameter. Utilising the empirical MBH - σc relation, we estimate that quenching via AGN feedback must occur at MBH≥106.5−7.5M, and is marked by steeply rising ΔΣSFR radial profiles in the green valley, indicating inside-out' quenching. On the other hand, environmental quenching occurs at over-densities of 10 - 30 times the average galaxy density at z$\sim$0.1, and is marked by steeply declining $\Delta \Sigma_{\rm SFR}$ profiles, indicating outside-in' quenching. Finally, through an analysis of stellar metallicities, we conclude that both intrinsic and environmental quenching must incorporate significant starvation of gas supply.



Galaxy: bulge, Galaxy: disc, galaxies: evolution, galaxies: formation, galaxies: star formation, galaxies: statistics

Journal Title

Monthly Notices of the Royal Astronomical Society

Conference Name

Journal ISSN


Volume Title



Oxford University Press (OUP)


All rights reserved
Science and Technology Facilities Council (ST/M001172/1)
European Research Council (695671)