Journal article
SDSS-IV MaNGA: properties of galaxies with kinematically decoupled stellar and gaseous components
Monthly notices of the Royal Astronomical Society, Vol.463(1), pp.913-926
11/21/2016
DOI: 10.1093/mnras/stw2055
Abstract
We study the properties of 66 galaxies with kinematically misaligned gas and stars from MaNGA survey. The fraction of kinematically misaligned galaxies varies with galaxy physical parameters, i.e. M
*, SFR and sSFR. According to their sSFR, we further classify these 66 galaxies into three categories, 10 star-forming, 26 ‘Green Valley’ and 30 quiescent ones. The properties of different types of kinematically misaligned galaxies are different in that the star-forming ones have positive gradient in D
n
4000 and higher gas-phase metallicity, while the green valley/quiescent ones have negative D
n
4000 gradients and lower gas-phase metallicity on average. There is evidence that all types of the kinematically misaligned galaxies tend to live in more isolated environment. Based on all these observational results, we propose a scenario for the formation of star-forming galaxies with kinematically misaligned gas and stars
$\--$
the progenitor accretes misaligned gas from a gas-rich dwarf or cosmic web, the cancellation of angular momentum from gas–gas collisions between the pre-existing gas and the accreted gas largely accelerates gas inflow, leading to fast centrally concentrated star formation. The higher metallicity is due to enrichment from this star formation. For the kinematically misaligned green valley and quiescent galaxies, they might be formed through gas-poor progenitors accreting kinematically misaligned gas from satellites which are smaller in mass.
Details
- Title: Subtitle
- SDSS-IV MaNGA: properties of galaxies with kinematically decoupled stellar and gaseous components
- Creators
- Yifei Jin - Nanjing UniversityYanmei Chen - Nanjing UniversityYong Shi - Nanjing UniversityC. A Tremonti - University of Wisconsin–MadisonM. A Bershady - University of Wisconsin–MadisonM Merrifield - University of NottinghamE Emsellem - École Normale Supérieure de LyonHai Fu - University of IowaD Wake - University of Wisconsin–MadisonK Bundy - Astronomy and SpaceLihwai Lin - Institute of Astronomy and Astrophysics, Academia SinicaM Argudo-Fernandez - Astronomy and SpaceSong Huang - Astronomy and SpaceT Storchi-Bergmann - Astronomy and SpaceD. V Stark - Astronomy and SpaceD Bizyaev - New Mexico State UniversityJ Brownstein - University of UtahJ Chisholm - University of Wisconsin–MadisonQi Guo - Chinese Academy of SciencesLei Hao - Chinese Academy of SciencesJian Hu - Tsinghua UniversityCheng Li - Tsinghua UniversityRan Li - Chinese Academy of SciencesK. L Masters - Astronomy and SpaceE Malanushenko - New Mexico State UniversityKaike Pan - New Mexico State UniversityR. A Riffel - Universidade Federal de Santa MariaA Roman-Lopes - Astronomy and SpaceA Simmons - New Mexico State UniversityD Thomas - Astronomy and SpaceLan Wang - Chinese Academy of SciencesK Westfall - Astronomy and SpaceRenbin Yan - University of Kentucky
- Resource Type
- Journal article
- Publication Details
- Monthly notices of the Royal Astronomical Society, Vol.463(1), pp.913-926
- DOI
- 10.1093/mnras/stw2055
- ISSN
- 0035-8711
- eISSN
- 1365-2966
- Publisher
- Oxford University Press
- Language
- English
- Date published
- 11/21/2016
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984200035502771
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