Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Physical Conditions and Metal Enrichment of Low-Redshift
  Interstellar and Intergalactic Media: The Benefits of High-Resolution
  Ultraviolet Spectra   To underscore the value of high spectral resolution for the study of low-z
QSO absorption lines, we briefly present Space Telescope Imaging Spectrograph
echelle data that demonstrate how increased resolution leads to dramatic
improvement in line measurements. We show that even R = lambda/Delta lambda =
20,000 is insufficient for some measurements. The higher the resolution the
better, but R ~ 50,000 is adequate for many outstanding questions about the IGM
and the ISM of galaxies that can be probed using QSO absorption lines.

10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat