The SAMI Galaxy Survey: asymmetry in gas kinematics and its links to stellar mass and star formation

被引：31

作者：

Bloom, J. V. ^{[1
,2
]}

Fogarty, L. M. R. ^{[1
,2
]}

Croom, S. M. ^{[1
,2
]}

Schaefer, A. ^{[1
,2
]}

Bryant, J. J. ^{[1
,2
,3
]}

Cortese, L. ^{[4
]}

Richards, S. ^{[1
,2
,3
]}

Bland-Hawthorn, J. ^{[1
]}

Ho, I-T. ^{[5
]}

Scott, N. ^{[1
,2
]}

Goldstein, G. ^{[6
]}

Medling, A. ^{[7
]}

Brough, S. ^{[3
]}

Sweet, S. M. ^{[7
]}

Cecil, G. ^{[8
]}

Lopez-Sanchez, A. ^{[3
,6
]}

Glazebrook, K. ^{[9
]}

Parker, Q. ^{[3
,6
,10
]}

Allen, J. T. ^{[1
,2
]}

Goodwin, M. ^{[3
]}

Green, A. W. ^{[3
]}

Konstantopoulos, I. S. ^{[3
,11
]}

Lawrence, J. S. ^{[3
]}

Lorente, N. ^{[3
]}

Owers, M. S. ^{[3
,6
]}

Sharp, R. ^{[7
]}

机构：

[1] Univ Sydney, Sch Phys, Sydney Inst Astron, Sydney, NSW 2006, Australia

[2] ARC Ctr Excellence All Sky Astrophys CAASTRO, Sydney, NSW, Australia

[3] Australian Astron Observ, POB 915, N Ryde, NSW 1670, Australia

[4] Univ Western Australia, Int Ctr Radio Astron Res, 35 Stirling Hwy, Crawley, WA 6009, Australia

[5] Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA

[6] Macquarie Univ, Dept Phys & Astron, N Ryde, NSW 2109, Australia

[7] ANU, Mt Stromlo Observ, Res Sch Astron & Astrophys, Cotter Rd Weston Creek, Weston, ACT 2611, Australia

[8] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA

[9] Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia

[10] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China

[11] Natl Innovat Ctr, Envizi Grp Suite 213,Australian Technol Pk, Eveleigh, NSW 2015, Australia

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2017年 / 465卷 / 01期

基金：

澳大利亚研究理事会;

关键词：

methods: data analysis; techniques: imaging spectroscopy; galaxies: evolution; galaxies: interactions; galaxies: kinematics and dynamics; galaxies: structure; DIGITAL SKY SURVEY; MERGER RATES; FORMING GALAXIES; MERGING GALAXIES; VELOCITY-FIELDS; REDSHIFT SURVEY; DATA RELEASE; CLOSE PAIRS; EVOLUTION; MORPHOLOGY;

D O I：

10.1093/mnras/stw2605

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the properties of kinematically disturbed galaxies in the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey using a quantitative criterion, based on kinemetry (Krajnovic et al.). The approach, similar to the application of kinemetry by Shapiro et al., uses ionized gas kinematics, probed by Ha emission. By this method, 23 +/- 7 per cent of our 360-galaxy sub-sample of the SAMI Galaxy Survey are kinematically asymmetric. Visual classifications agree with our kinemetric results for 90 per cent of asymmetric and 95 per cent of normal galaxies. We find that stellar mass and kinematic asymmetry are inversely correlated and that kinematic asymmetry is both more frequent and stronger in low-mass galaxies. This builds on previous studies that found high fractions of kinematic asymmetry in low-mass galaxies using a variety of different methods. Concentration of star formation and kinematic disturbance are found to be correlated, confirming results found in previous work. This effect is stronger for high-mass galaxies (log(M-*) > 10) and indicates that kinematic disturbance is linked to centrally concentrated star formation. Comparison of the inner (within 0.5R(e)) and outer Ha equivalent widths of asymmetric and normal galaxies shows a small but significant increase in inner equivalent width for asymmetric galaxies.

引用

页码：123 / 148

页数：26

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