Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Detection of CO J=1-0 in the z=3.79 radio galaxy 4C60.07   We report on the detection of the lowest CO J = 1 - 0 transition in the
powerful high-redshift radio galaxy 4C60.07 at z = 3.79. The CO emission is
distributed in two spatially and kinematically distinct components as was
previously known from the observations of the higher excitation CO J = 4 - 3
line. The total molecular gas mass in 4C60.07 inferred from the CO J = 1 - 0
emission is M(H_2) = 1.3 x 10^11 M_sun, sufficient to fuel the inferred
star-formation rate of ~1600 M_sun yr^-1 for 10^8 yrs. From our high-resolution
CO J = 1 - 0 VLA maps we find the dynamical mass of 4C60.07 to be comparable to
that of a giant elliptical at the present time. A significant fraction of the
mass is in the form of molecular gas suggesting that 4C60.07 is in an early
state of its evolution. The merging nature of 4C60.07 along with its large
dynamical mass imply that this system is a giant elliptical caught in its
formative stages.

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The categories of this paper are: math-ph
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The categories of this paper are: stat
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The categories of this paper are: acc-phys
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The categories of this paper are: econ
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The categories of this paper are: supr-con
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The categories of this paper are: gr-qc
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The categories of this paper are: bayes-an
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The categories of this paper are: cond-mat
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The categories of this paper are: nlin
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The categories of this paper are: physics
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ph
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The categories of this paper are: eess
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The categories of this paper are: math
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The categories of this paper are: dg-ga