Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: SPIFFI observations of the starburst SMMJ14011+0252: Already old, fat,
  and rich by z = 2.565   Using the SPectrometer for Infrared Faint Field Imaging (SPIFFI) on the ESO
VLT, we have obtained J, H, and K band integral field spectroscopy of the z =
2.565 luminous submillimeter galaxy SMMJ14011+0252. A global spectrum reveals
the brighter of this spatially resolved system's two components as an intense
starburst that is remarkably old, massive, and metal-rich for the early epoch
at which it is observed. We see a strong Balmer break implying a > 100 Myr
timescale for continuous star formation, as well as nebular emission line
ratios implying a supersolar oxygen abundance on large spatial scales. Overall,
the system is rapidly converting a large baryonic mass into stars over the
course of only a few hundred Myr. Our study thus adds new arguments to the
growing evidence that submillimeter galaxies are more massive than Lyman break
galaxies, and more numerous at high redshift than predicted by current
semi-analytic models of galaxy evolution.

16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs