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Jeremy Bradford edited Introduction.tex
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\section{Introduction}
Supermassive black holes (BHs)
inhabit live at the
centers heart of essentially all massive galaxies with bulges.
Observations of present-day dwarf galaxies hosting massive BHs
can place valuable constraints on the host galaxies both power AGN and
are thought to be important agents in the
correlation evolution of
observed HI gas properties with central BHs. their hosts. Using optical spectroscopy from the SDSS,
we \textbf{we have systematically assembled the largest sample of
dwarf low mass (dwarf) galaxies hosting massive BHs to
date date} (Reines et al. 2013). These dwarf galaxies have stellar masses comparable to the Magellanic Clouds ($M_{\rm stellar} ∼ 10^{8.5} − 10^{9.5} M_{\odot}$) and contain some of the least-massive BHs known in galaxy nuclei ($M_{\rm BH} ∼ 10^5 M_{\odot}$).
\textbf{We propose new 21 cm neutral hydrogen (HI) emission observations to study the properties of the least-massive galaxies known to contain massive BHs}. These observations will enable us to investigate host galaxy properties by examining BH to HI scaling relations at the sparsely-populated low-mass end. We will compare the gas content, dynamical masses and scaling relations of our BH sample against an isolated dwarf control sample (Bradford et al, in prep.). The results of our study will provide vital information on the formation and evolution of the smallest galaxies hosting massive BHs as well as the effect of AGN feedback on the cold HI gas content of these low mass galaxies.
\textbf{We propose new 21 cm neutral hydrogen (HI) emission observations to study the properties of the least-massive galaxies known to contain massive BHs}. These observations will enable us to investigate host galaxy properties by examining BH to HI scaling relations at the sparsely-populated low-mass end. We will compare the gas content and scaling relations of our BH sample against the isolated dwarf control sample of Bradford et al., in prep. The results of our study will provide vital information on the formation and evolution of the smallest galaxies hosting massive BHs as well as the effect of AGN feedback on the cold HI gas content of dwarf galaxies.