The Velocity Map Asymmetry of Ionized Gas in MaNGA. I. The Catalog and General Properties

Journal Article · Wed Aug 17 00:00:00 EDT 2022 · The Astrophysical Journal. Supplement Series

DOI:https://doi.org/10.3847/1538-4365/ac80f2· OSTI ID:1983315

Feng, Shuai ^[1]; Shen, Shi-Yin ^[2]; Yuan, Fang-Ting ^[3]; Dai, Y. Sophia ^[4]; Masters, Karen L. ^[5]

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1. Hebei Normal University, Shijiazhuang (China); Hebei Key Laboratory of Photophysics Research and Application, Shijiazhuang (China); Chinese Academy of Sciences, Shanghai (China)
2. Chinese Academy of Sciences, Shanghai (China); Key Lab for Astrophysics, Shanghai (China)
3. Chinese Academy of Sciences, Shanghai (China)
4. Chinese Academy of Sciences South America Center for Astronomy (CASSACA) / National Astronomical Observatories of China (NAOC), Beijing (China)
5. Haverford College, PA (United States)

The SDSS-IV MaNGA survey has measured two-dimensional maps of emission-line velocities for a statistically powerful sample of nearby galaxies. The asymmetric features of these kinematics maps reflect the nonrotational component of a galaxy’s internal motion of ionized gas. In this study, we present a catalog of kinematic asymmetry measurements of the Hαvelocity map of a sample of 5353 MaNGA galaxies. Based on this catalog, we find that “special” galaxies (e.g., merging galaxies, barred galaxies, and active galactic nucleus host galaxies) contain more galaxies with highly asymmetric velocity maps. However, we notice that more than half of galaxies with high kinematic asymmetry in our sample are quite “regular.” For those “regular” galaxies, kinematic asymmetry shows a significant anticorrelation with stellar mass at $\log M_{*}<9.7$ , while such a trend becomes very weak at $\log M_{*}>9.7$ . Moreover, at a given stellar mass, the kinematic asymmetry shows weak correlations with photometric morphology, star formation rate, and environment, while it is independent of Higas content. We also have quantified the observational effects in the kinematic asymmetry measurement. We find that both the signal-to-noise ratio of Hαflux and disk inclination angle contribute to the measures of kinematic asymmetry, while the physical spatial resolution is an irrelevant factor inside the MaNGA redshift coverage.

• Research Organization: US Department of Energy (USDOE), Washington, DC (United States). Office of Science, Sloan Digital Sky Survey (SDSS)
• Sponsoring Organization: USDOE Office of Science (SC)
• OSTI ID: 1983315
• Journal Information: The Astrophysical Journal. Supplement Series, Journal Name: The Astrophysical Journal. Supplement Series Journal Issue: 1 Vol. 262; ISSN 0067-0049
• Publisher: IOP Publishing
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
Astronomy &amp; Astrophysics
Galaxies
Galaxy formation
Galaxy kinematics
Galaxy structure