est work in the MASSIVE series presents the
first results from the high angular resolution
portion of the survey, based on deep GMOS-
North IFS observations of 20 galaxies. These
are combined with wide-field IFS data from
the Mitchell spectrograph at McDonald Ob-
servatory to obtain detailed kinematic maps
spanning more than two orders of magni-
tude in galactocentric radius. The new study
appears in the June issue of The Astrophysical
Journal and is led by graduate student Irina
Ene of the University of California, Berkeley.
Figure 4 shows example maps of the first
four moments (v, σ, h 3 , and h 4 ) of the stellar
velocity distributions from the high-quality
GMOS IFS data for two galaxies in the sur-
vey. The maps cover the central 5 × 7 arc-
Figure 4.
Example distribu-
tions of the first
four kinematical
moments (v, σ, h 3
and h 4 ) measured
from the GMOS-N
IFS data for two
of the MASSIVE
survey galaxies.
For each galaxy,
the top row shows
two-dimensional
maps, while the
bottom row shows
two-sided radial
profiles from
GMOS (magenta
circles) and Mitch-
ell (green squares)
data. The vertical
dotted lines mark
radii of ± 0.2 arc-
second.
[Figure repro-
duced from Ene
et al., The Astro-
physical Journal,
878: 57, 2019.]
12
GeminiFocus
July 2019