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Published February 28, 2017 | Submitted + Published
Journal Article Open

Reconciling mass functions with the star-forming main sequence via mergers

Abstract

We combine star formation along the 'main sequence', quiescence and clustering and merging to produce an empirical model for the evolution of individual galaxies. Main-sequence star formation alone would significantly steepen the stellar mass function towards low redshift, in sharp conflict with observation. However, a combination of star formation and merging produces a consistent result for correct choice of the merger rate function. As a result, we are motivated to propose a model in which hierarchical merging is disconnected from environmentally independent star formation. This model can be tested via correlation functions and would produce new constraints on clustering and merging.

Additional Information

© 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. Received 08 December 2016; revision received 24 February 2017; accepted 24 February 2017; published 28 February 2017. The authors would like to thank Micaela Bagley, Andrew Benson, Zachary Claytor, Andreas Faisst, Olivier Ilbert, Adam Jermyn, Ian Kuehne, Dan Masters, Daniel McAndrew and Sune Toft for helpful comments. CLS acknowledges support from the ERC Consolidator Grant funding scheme (project ConTExt, grant No. 648179) and from the Carlsberg Foundation. DY was supported by the Victor Neher SURF Fellowship.

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Submitted - 1703.00450.pdf

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August 22, 2023
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