Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 488, Issue 3, Pages 3929-3948Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stz1894
Keywords
galaxies: evolution; galaxies: fundamental parameters; galaxies: star formation
Categories
Funding
- CONACYT [CB-285080, 180125]
- UNAM project [PAPIIT-DGAPA-IA101217]
- UC MEXUS-CONACYT [CN-17-128]
- UNAM PAPIIT grant [IA104118]
- CONACyT 'Ciencia Basica' grant [285721]
- FONDECYT [1170618]
- Alfred P. Sloan Foundation
- U.S. Department of Energy Office of Science
- Center for High Performance Computing at the University of Utah
- Brazilian Participation Group
- Carnegie Institution for Science. Carnegie Mellon University
- Chilean Participation Group
- French Participation Group
- Harvard-Smithsonian Center for Astrophysics
- Institute de Astrofisica de Canarias
- The Johns Hopkins University
- Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo
- Lawrence Berkeley National Laboratory
- Leibniz Institut fur Astrophysik Potsdam (AIP)
- Max-Planck-Institut fur Astronomic (MPIA Heidelberg)
- Max-Planck-Institut fur Astrophysik (MPA Garching)
- Max-Planck-Institut fur Extraterrestrische Physik (MPE)
- National Astronomical Observatories of China
- New Mexico State University
- New York University
- University of Notre Dame
- Observatario Nacional/MCTI
- Ohio State University
- Pennsylvania State University
- Shanghai Astronomical Observatory
- United Kingdom Participation Group
- Universidad Nacional Autonoma de Mexico
- University of Arizona
- University of Colorado Boulder
- University of Oxford
- University of Portsmouth
- University of Utah
- University of Virginia
- University of Washington
- University of Wisconsin
- Vanderbilt University
- Yale University
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We study the global star-formation rate (SFR) vs. stellar mass (M-*) correlation, and the spatially-resolved SFR surface density (Sigma(SFR)) vs. stellar mass surface density (Sigma(*)) correlation, in a sample of similar to 2,000 galaxies from the MaNGA MPL-5 survey. We classify galaxies and spatially-resolved areas into star-forming and retired according to their ionization processes. We confirm the existence of a Star-Forming Main Sequence (SFMS) for galaxies and spatially-resolved areas, and show that they have the same nature, with the global as a consequence of the local one. The latter presents a bend below a limit Sigma(*) value, approximate to 3x10(7) M(circle dot)kpc(-2), which is not physical. Using only star-forming areas (SFAs) above this limit, a slope and a scatter of approximate to 1 and approximate to 0.27 dex are determined. The retired galaxies/areas strongly segregate from their respective SFMS's, by similar to-1.5 dex on average. We explore how the global/local SFMS's depend on galaxy morphology, finding that for star-forming galaxies and SFAs, there is a trend to lower values of star-formation activity with earlier morphological types, which is more pronounced for the local SFMS. The morphology not only affects the global SFR due to the diminish of SFAs with earlier types, but also affects the local SF process. Our results suggest that the local SF at all radii is established by some universal mechanism partially modulated by morphology. Morphology seems to be connected to the slow aging and sharp decline of the SF process, and on its own it may depend on other properties as the environment.
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