4.7 Article

The ALMaQUEST Survey. VII. Star Formation Scaling Relations of Green Valley Galaxies

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ASTROPHYSICAL JOURNAL
卷 926, 期 2, 页码 -

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IOP Publishing Ltd
DOI: 10.3847/1538-4357/ac4ccc

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  1. Academia Sinica under the Career Development Award [CDA-107-M03]
  2. Ministry of Science & Technology of Taiwan [MOST 108-2628-M-001-001-MY3]
  3. ERC [695671]
  4. Science and Technology Facilities Council (STFC)
  5. Alfred P. Sloan Foundation
  6. U.S. Department of Energy Office of Science
  7. Center for High-Performance Computing at the University of Utah
  8. Brazilian Participation Group
  9. Carnegie Institution for Science
  10. Carnegie Mellon University
  11. Chilean Participation Group
  12. French Participation Group
  13. Harvard-Smithsonian Center for Astrophysics
  14. Instituto de Astrofisica de Canarias
  15. Johns Hopkins University
  16. Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo
  17. Lawrence Berkeley National Laboratory
  18. Leibniz Institut fur Astrophysik Potsdam (AIP)
  19. Max-Planck-Institut fur Astronomie (MPIA Heidelberg)
  20. Max-Planck-Institut fur Astrophysik (MPA Garching)
  21. Max-PlanckInstitut fur Extraterrestrische Physik (MPE)
  22. National Astronomical Observatory of China
  23. New Mexico State University
  24. New York University
  25. University of Notre Dame
  26. Observatario Nacional/MCTI
  27. Ohio State University
  28. Pennsylvania State University
  29. Shanghai Astronomical Observatory
  30. United Kingdom Participation Group
  31. Universidad Nacional Autonoma de Mexico
  32. University of Arizona
  33. University of Colorado Boulder
  34. University of Oxford
  35. University of Portsmouth
  36. University of Utah
  37. University of Virginia
  38. University of Washington
  39. University of Wisconsin
  40. Vanderbilt University
  41. Yale University

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This study investigates the kpc-scale scaling relations using the ALMA-MaNGA QUEnch and STar formation (ALMaQUEST) survey and finds differences in the scaling relations between GV and MS galaxies, with retired spaxels having lower absolute values compared to star-forming spaxels.
We utilize the ALMA-MaNGA QUEnch and STar formation (ALMaQUEST) survey to investigate the kpc-scale scaling relations, presented as the resolved star-forming MS (rSFMS: Sigma(SFR) versus Sigma(*)), the resolved Schmidt-Kennicutt relation (rSK: Sigma(SFR) versus Sigma(H2) ), and the resolved molecular gas MS (rMGMS: Sigma(H2) versus Sigma(*)), for 11,478 star-forming and 1414 retired spaxels (oversampled by a factor of similar to 20) located in 22 GV and 12 MS galaxies. For a given galaxy type (MS or GV), the retired spaxels are found to be offset from the sequences formed by the star-forming spaxels on the rSFMS, rSK, and rMGMS planes, toward lower absolute values of sSFR, SFE, and f(H2) by similar to 1.1, 0.6, and 0.5 dex. The scaling relations for GV galaxies are found to be distinct from that of the MS galaxies, even if the analyses are restricted to the star-forming spaxels only. It is found that, for star-forming spaxels, sSFR, SFE, and f(H2) in GV galaxies are reduced by similar to 0.36, 0.14, and 0.21 dex, respectively, compared to those in MS galaxies. Therefore, the suppressed sSFR/SFE/f (gas) in GV galaxies is associated with not only an increased proportion of retired regions in GV galaxies but also a depletion of these quantities in star-forming regions. Finally, the reduction of SFE and f(H2) in GV galaxies relative to MS galaxies is seen in both bulge and disk regions (albeit with larger uncertainties), suggesting that, statistically, quenching in the GV population may persist from the inner to the outer regions.

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