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The SAMI galaxy survey: Galaxy Interactions and Kinematic Anomalies in Abell 119 | | Sree Oh
; Sukyoung K. Yi
; Luca Cortese
; Jesse van de Sande
; Smriti Mahajan
; Hyunjin Jeong
; Yun-Kyeong Sheen
; James T. Allen
; Kenji Bekki
; Joss Bland-Hawthorn
; Jessica V. Bloom
; Sarah Brough
; Julia J. Bryant
; Matthew Colless
; Scott M. Croom
; L. M. R. Fogarty
; Michael Goodwin
; Andy Green
; Iraklis S. Konstantopoulos
; Jon Lawrence
; Á. R. López-Sánchez
; Nuria P. F. Lorente
; Anne M. Medling
; Matt S. Owers
; Samuel Richards
; Nicholas Scott
; Rob Sharp
; Sarah M. Sweet
; | | Date: |
12 Sep 2016 | | Abstract: | Galaxy mergers are important events that can determine the fate of a galaxy
by changing its morphology, star-formation activity and mass growth. Merger
systems have commonly been identified from their disturbed morphologies, and we
now can employ Integral Field Spectroscopy to detect and analyze the impact of
mergers on stellar kinematics as well. We visually classified galaxy morphology
using deep images ($mu_{
m r} = 28,
m mag,, arcsec^{-2}$) taken by the
Blanco 4-m telescope at the Cerro Tololo Inter-American Observatory. In this
paper we investigate 63 bright ($M_{
m r}<-19.3$) spectroscopically-selected
galaxies in Abell 119; of which 53 are early type and 20 galaxies show a
disturbed morphology by visual inspection. A misalignment between the major
axes in the photometric image and the kinematic map is conspicuous in
morphologically-disturbed galaxies. Our sample is dominated by early-type
galaxies, yet it shows a surprisingly tight Tully-Fisher relation except for
the morphologically-disturbed galaxies which show large deviations. Three out
of the eight slow rotators in our sample are morphology disturbed. The
visually-selected morphologically-disturbed galaxies are generally more
asymmetric, visually as well as kinematically. Our findings suggest that galaxy
interactions, including mergers and perhaps fly-bys, play an important role in
determining the orientation and magnitude of galaxy’s angular momentum. | | Source: | arXiv, 1609.3595 | | Services: | Forum | Review | PDF | Favorites | |
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