Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stars within the Large Magellanic Cloud as Potential Lenses for Observed
  Microlensing Events   Massive Compact objects in the halo, known as MACHOs, have been postulated as
the origin of a substantial fraction of `dark matter' known to exist in the
haloes of galaxies$^{1,2}$. Paczy\'nski$^3$ has suggested that it might
possible to detect these low-luminosity objects by their potential to act as
gravitational lenses, causing a characteristic brightening when they cross the
path of light from a star in a nearby galaxy. very recently, two groups
reported possible detections of microlensing of stars in the Large Magellanic
Cloud (LMC)$^{4,5}$. Here I show that microlensing by stars within the LMC
itself can account for the observed events. It is further shown that if stars
within the LMC are the lenses, the observed light curve can differ from the
light curve due to a galactic lens even at relatively low magnifications. This
provides a possibility of distinguishing between the galactic lenses and the
LMC lenses. For a given number of monitored stars, the LMC induced events
should be strongly concentrated towards the central region of the LMC, while
the galactic events should be uniformly spread over the whole area of the LMC,
so the two can also be distinguished statistically.

34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg