Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: WALLABY Pre-Pilot Survey: The effects of angular momentum and
  environment on the HI gas and star formation properties of galaxies in the
  Eridanus supergroup   We use high-resolution ASKAP observations of galaxies in the Eridanus
supergroup to study their HI, angular momentum and star formation properties,
as part of the WALLABY pre-pilot survey efforts. The Eridanus supergroup is
composed of three sub-groups in the process of merging to form a cluster. The
main focus of this study is the Eridanus (or NGC 1395) sub-group. The baryonic
specific angular momentum - baryonic mass ($j_{\mathrm{b}} - M_{\mathrm{b}}$)
relation for the Eridanus galaxies is observed to be an unbroken power law of
the form $j_{\mathrm{b}} \propto M_{\mathrm{b}}^{0.57 \pm 0.05}$, with a
scatter of $\sim 0.10 \pm 0.01$ dex, consistent with previous works. We examine
the relation between the atomic gas fraction, $f_{\mathrm{atm}}$, and the
integrated atomic disc stability parameter $q$ (the $f_{\mathrm{atm}} - q$
relation), and find that the Eridanus galaxies deviate significantly from the
relation owing to environmental processes such as tidal interactions and
ram-pressure affecting their HI gas. We find that a majority of the Eridanus
galaxies are HI deficient compared to normal star-forming galaxies in the
field. We also find that the star formation among the Eridanus galaxies may be
suppressed owing to their environment, thus hinting at significant levels of
pre-processing within the Eridanus sub-group, even before the galaxies have
entered a cluster-like environment.

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The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
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The categories of this paper are: bayes-an
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat