Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Extended Structure and Fate of the Nucleus in Henize 2-10   We investigate the structure and nuclear region of the black hole (BH)
hosting galaxy Henize2-10. Surface brightness (SB) profiles are analyzed using
Magellan/Megacam $g$- and $r$-band images. Excluding the central starburst, we
find a best-fit two component S\'ersic profile with $n_{\rm in} \sim 0.6$,
$r_{\text{eff,in}} \sim$ 260~pc, and $n_{\rm out}\sim 1.8$, $r_{\text{eff,
out}}\sim$ 1 kpc. Integrating out to our outer most data point (100 arc sec
$\sim$ 4.3 kpc), we calculate $M_g=-19.2$ and $M_r=-19.8$. The corresponding
enclosed stellar mass is $M_{\star}\sim(10\pm3)\times10^9$ M$_\odot$,
$\sim3\times$ larger than previous estimates. Apart from the central
$\lesssim$500 pc, with blue colors and an irregular morphology, the galaxy
appears to be an early-type system. The outer color is quite red,
$(g-r)_0=0.75$, suggesting a dominant old population. We study the nuclear
region of the galaxy using archival Gemini/NIFS $K$-band adaptive optics
spectroscopy and {\it Hubble Space Telescope} imaging. We place an upper limit
on the BH mass of $\sim10^7M_{\odot}$ from the NIFS data, consistent with that
from the $M_{\rm BH}$-radio-X-ray fundamental plane. No coronal lines are seen,
but a Br$\gamma$ source is located at the position of the BH with a luminosity
consistent with the X-ray emission. The starburst at the center of Henize 2-10
has led to the formation of several super star clusters, which are within
$\sim$100 pc of the BH. We examine the fate of the nucleus by estimating the
dynamical masses and dynamical friction timescales of the clusters. The most
massive clusters ($\sim 10^6 M_\odot$) have $\tau_{\rm dyn} \lesssim 200$ Myr,
and thus Henize 2-10 may represent a rare snapshot of nuclear star cluster
formation around a pre-existing massive BH.

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The categories of this paper are: cond-mat
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
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The categories of this paper are: atom-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: eess
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-bio
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The categories of this paper are: q-alg
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The categories of this paper are: hep-th
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The categories of this paper are: nlin
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The categories of this paper are: econ
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The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an
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The categories of this paper are: comp-gas
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The categories of this paper are: cs