Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hot Stars in Old Stellar Populations: A Continuing Need for Intermediate
  Ages   We investigate the effect of a small contamination of hot, old, metal-poor
starlight on the inferred stellar populations of early-type galaxies in the
core of the Coma Cluster. We find that the required correction to the Balmer
and metal absorption-line strengths for old, metal-poor stars does not
significantly affect the inferred age of the stellar population when the Hbeta
strength is large. Intermediate-aged populations are therefore still needed to
explain enhanced Balmer-line strengths in early-type galaxies. This gives us
increased confidence in our age estimates for these objects. For galaxies with
weak Balmer-line strengths corresponding to very old populations (t>10 Gyr),
however, a correction for hot stars may indeed alter the inferred age, as
previously suggested. Finally, the inferred metallicity [Z/H] will always be
higher after any correction for old, metal-poor starlight than without, but the
enhancement ratios [E/Fe] will strengthen only slightly.

22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph