Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evidence of a past disc-disc encounter: HV and DO Tau   Theory and observations suggest that star formation occurs hierarchically due
to the fragmentation of giant molecular clouds. In this case we would expect
substructure and enhanced stellar multiplicity in the primordial cluster. This
substructure is expected to decay quickly in most environments, however
historic stellar encounters might leave imprints in a protoplanetary disc (PPD)
population. In a low density environment such as Taurus, tidal tails from
violent star-disc or disc-disc encounters might be preserved over time-scales
sufficient to be observed. In this work, we investigate the possibility that
just such an event occured between HV Tau C (itself a component of a triple
system) and DO Tau $\sim 0.1$ Myr ago, as evidenced by an apparent `bridge'
structure evident in the $160$ $\mu$m emission. By modelling the encounter
using smoothed particle hydrodynamics (SPH) we reproduce the main features of
the observed extended structure (`V'-shaped emission pointing west of HV Tau
and a tail-like structure extending east of DO Tau). We suggest that HV Tau and
DO Tau formed together in a quadruple system on a scale of $\sim 5000$ au
($0.025$ pc).

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The categories of this paper are: cs
4
The categories of this paper are: cond-mat
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
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The categories of this paper are: nlin
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The categories of this paper are: comp-gas
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The categories of this paper are: physics
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The categories of this paper are: hep-lat
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The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
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The categories of this paper are: solv-int
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The categories of this paper are: q-fin
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The categories of this paper are: stat