Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Star-formation properties of Hickson Compact Groups based on deep
  H{\alpha} imaging   We present deep H{\alpha} imaging of seven Hickson Compact Groups (HCGs)
using the 4.1m Southern Astrophysics Research (SOAR) Telescope. The high
spatial resolution of the observations allow us to study both the integrated
star-formation properties of the main galaxies as well as the 2D distribution
of star-forming knots in the faint tidal arms that form during interactions
between the individual galaxies. We derive star-formation rates and stellar
masses for group members and discuss their position relative to the main
sequence of star-forming galaxies. Despite the existence of tidal features
within the galaxy groups, we do not find any indication for enhanced
star-formation in the selected sample of HCGs. We study azimuthally averaged
H{\alpha} profiles of the galaxy disks and compare them with the g' and r'
surface-brightness profiles. We do not find any truncated galaxy disks but
reveal that more massive galaxies show a higher light concentration in
H{\alpha} than less massive ones. We also see that galaxies that show a high
light concentration in r', show a systematic higher light concentration in
H{\alpha}. TDG candidates have been previously detected in R-band images for 2
groups in our sample but we find that most of them are likely background
objects as they do not show any emission in H{\alpha}. We present a new tidal
dwarf galaxy (TDG) candidate at the tip of the tidal tail in HCG 91.

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The categories of this paper are: hep-ex
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The categories of this paper are: acc-phys
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The categories of this paper are: q-bio
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The categories of this paper are: funct-an
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The categories of this paper are: eess
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The categories of this paper are: comp-gas
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The categories of this paper are: q-alg
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: supr-con
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The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
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The categories of this paper are: patt-sol
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The categories of this paper are: atom-ph