Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search for L5 Earth Trojans with DECam   Most of the major planets in the Solar System support populations of
co-orbiting bodies, known as Trojans, at their L4 and L5 Lagrange points. In
contrast, Earth has only one known co-orbiting companion. This paper presents
the results from a search for Earth Trojans using the DECam instrument on the
Blanco Telescope at CTIO. This search found no additional Trojans in spite of
greater coverage compared to previous surveys of the L5 point. Therefore, the
main result of this work is to place the most stringent constraints to date on
the population of Earth Trojans. These constraints depend on assumptions
regarding the underlying population properties, especially the slope of the
magnitude distribution (which in turn depends on the size and albedo
distributions of the objects). For standard assumptions, we calculate upper
limits to a 90% confidence limit on the L5 population of $N_{ET}<1$ for
magnitude $H<15.5$, $N_{ET}=60-85$ for $H<19.7$, and $N_{ET}\ $= 97 for
$H=20.4$. This latter magnitude limit corresponds to Trojans $\sim$300 m in
size for albedo $0.15$. At H=19.7, these upper limits are consistent with
previous L4 Earth Trojan constraints and significantly improve L5 constraints.

28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys