Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Star clusters and young populations in the dwarf irregular galaxy Leo A   We have studied young stellar populations and star clusters in the dwarf
irregular galaxy Leo A using multicolor ($B$, $V$, $R$, $I$, $H\alpha$)
photometry data obtained with the Subaru Suprime-Cam and two-color photometry
results measured on archival HST/ACS $F475W$ and $F814W$ frames. The analysis
of the main sequence (MS) and blue supergiant (BSG - "blue loop") stars enabled
us to study the star formation history in the Leo A galaxy during the last
$\sim$200 Myr. Also, we have discovered 5 low-mass ($\lesssim$400 M$_\odot$)
star clusters within the ACS field. This finding, taking into account a low
metallicity environment and a yet-undetected molecular gas in Leo A, constrains
star formation efficiency estimates and scenarios. Inside the well known "hole"
in the HI column density map (Hunter et al. 2012) we found a shock front
(prominent in $H\alpha$), implying an unseen progenitor and reminding the
"hole" problems widely discussed by Warren et al. (2011).

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The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: cmp-lg
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The categories of this paper are: quant-ph
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The categories of this paper are: solv-int
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The categories of this paper are: gr-qc
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The categories of this paper are: eess
3
The categories of this paper are: physics
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
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The categories of this paper are: funct-an
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-th
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The categories of this paper are: hep-ex