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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
SDSS-IV MaNGA: Properties of galaxies with kinematically decoupled stellar and gaseous components
Monthly Notices of the Royal Astronomical Society, Volume 463, No. 1, Year 2016
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Description
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 starforming ones have positive gradient in Dn4000 and higher gas-phase metallicity, while the green valley/quiescent ones have negative Dn4000 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. © 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.
Authors & Co-Authors
Chen, Yanmei
China, Nanjing
Nanjing University
China, Beijing
Ministry of Education of the People's Republic of China
Tremonti, Christy A.
United States, Madison
University of Wisconsin-madison
Bershady, Matthew A.
United States, Madison
University of Wisconsin-madison
Merrifield, Michael R.
United Kingdom, Nottingham
University of Nottingham
Emsellem, Éric
Germany, Garching Bei Munchen
European Southern Observatory
France, Saint-genis-laval
Centre de Recherche Astrophysique de Lyon
Fu, Hai
United States, Iowa City
University of Iowa
Wake, David A.
United States, Madison
University of Wisconsin-madison
United Kingdom, Milton Keynes
The Open University
Bundy, Kevin A.
Japan, Tokyo
The University of Tokyo
Lin, Lihwai
Taiwan, Taipei
Academia Sinica, Institute of Astronomy and Astrophysics
Argudo-Fernández, M.
Chile, Antofagasta
Universidad de Antofagasta
China, Beijing
Chinese Academy of Sciences
Stark, David V.
Japan, Tokyo
The University of Tokyo
Storchi-Bergmann, Thaísa
Brazil, Porto Alegre
Universidade Federal do Rio Grande do Sul
Brazil, Rio de Janeiro
Laboratório Interinstitucional de E-astronomia
Bizyaev, Dmitry Anatolevich
United States, Las Cruces
New Mexico State University
Russian Federation, Moscow
Lomonosov Moscow State University
Brownstein, Joel R.
United States, Salt Lake City
The University of Utah
Guo, Qi
China, Beijing
Chinese Academy of Sciences
Li, Cheng
China, Beijing
Tsinghua University
Li, Ran
China, Beijing
Chinese Academy of Sciences
Masters, Karen L.
United Kingdom, Portsmouth
University of Portsmouth
Malanushenko, Elena
United States, Las Cruces
New Mexico State University
Pan, Kaike
United States, Las Cruces
New Mexico State University
Riffel, Rogemar André
Brazil, Rio de Janeiro
Laboratório Interinstitucional de E-astronomia
Brazil, Santa Maria
Universidade Federal de Santa Maria
Roman-Lopes, Alexandre
Chile, La Serena
Universidad de la Serena
Simmons, Audrey E.
United States, Las Cruces
New Mexico State University
Thomas, Daniel B.
United Kingdom, Portsmouth
University of Portsmouth
Westfall, Kyle B.
Brazil, Santa Maria
Universidade Federal de Santa Maria
Yan, Renbin
United States, Lexington
University of Kentucky
Statistics
Citations: 60
Authors: 26
Affiliations: 22
Identifiers
Doi:
10.1093/mnras/stw2055
ISSN:
00358711
Study Design
Cross Sectional Study
Study Approach
Quantitative