Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stellar Kinematics and Structural Properties of Virgo Cluster Dwarf
  Early-Type Galaxies from the SMAKCED Project II. The Survey and a Systematic
  Analysis of Kinematic Anomalies and Asymmetries   We present spatially resolved kinematics and global stellar populations and
mass-to-light ratios for a sample of 39 dwarf early-type (dE) galaxies in the
Virgo cluster studied as part of the SMAKCED stellar absorption-line
spectroscopy and imaging survey. This sample is representative of the
early-type population in the absolute magnitude range -19.0 < M_r < -16.0. For
each dE, we measure the rotation curve and velocity dispersion profile and fit
an analytic function to the rotation curve. We study the significance of the
departure of the rotation curve from the best fit analytic function (poorly
fit) and of the difference between the approaching and receding sides of the
rotation curve (asymmetry). We find that 62 +/- 8 % (23 out of the 39) of the
dEs have a significant anomaly in their rotation curve. Analysis of the images
reveals photometric anomalies for most galaxies. However, there is no clear
correlation between the significance of the photometric and kinematic
anomalies. We measure age-sensitive and metallicity-sensitive Lick spectral
indices and find a wide range of ages and metallicities. We also find that 4
dEs have emission partially filling in the Balmer absorption lines. Finally, we
estimate the total masses and dark matter fractions of the dEs. They have a
median total mass and dark matter fraction within the Re of log Me = 9.1 +/-
0.2 and f_DM = 46 +/- 18 %. We plot several scaling relations and show that dEs
seem to be the bridge between massive early-type and dwarf spheroidal galaxies.

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The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
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The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
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The categories of this paper are: eess
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The categories of this paper are: econ
4
The categories of this paper are: cond-mat