Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Faint Fuzzies and the Formation of Lenticular Galaxies   We investigate the dynamical state of a new class of extended star clusters,
known as "Faint Fuzzies", that were discovered in two nearby S0 galaxies, NGC
1023 and NGC 3384. It is shown that the Faint Fuzzies of NGC 1023 lie in a fast
rotating ring-like structure within the galactic disk with mean radius of 5
kpc, rotational velocity of 200 km/s and velocity dispersion of 115 km/s. We
propose a scenario for the origin of Faint Fuzzies that is connected to the
origin of S0 galaxies as a result of galaxy-galaxy interactions in dense
environments. As is apparent in the Cartwheel galaxy, and is confirmed by
numerical simulations, the passage of a small galaxy through, or close to, the
center of a disk galaxy can form a ring of clumpy star formation with a radius
comparable to the Faint Fuzzy ring radius in NGC 1023. In this case, the Faint
Fuzzies are signposts for the transformation of spiral galaxies into
lenticulars via such interactions.

15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con