A Principle Component Analysis of Galaxy Properties from  a Large, Gas-Selected Sample

<table>Comparison between dynamical masses from H<small class="sc">I</small> as D08/G09 and dynamical masses from starlight [<a href="/journals/aa/2012/208901/#B47">1</a>–<a href="/journals/aa/2012/208901/#B49">3</a>]. The dots are the 320 galaxies in ALFALFA/SDSS samples and cross symbols are the 164 galaxies from ALFALFA/SDSS/2MASS subsamples. The solid line indicates that the H<small class="sc">I</small> dynamical masses are on-average <svg height="10.8625" id="M71" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 40.512501 10.8625" width="40.512501" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,0,0,-.017,.062,10.8)"><path d="M548 311q-21 -57 -59 -94t-89 -37q-53 0 -128 52q-55 38 -84 38q-39 0 -70.5 -23t-45.5 -60l-32 12q21 57 59 94t89 37q53 0 128 -52q55 -38 84 -38q39 0 70.5 23t45.5 60z" id="x223C"></path></g><g transform="matrix(.017,0,0,-.017,14.749,10.8)"><path d="M456 178h-96v-72q0 -51 12.5 -62.5t72.5 -16.5v-27h-256v27q65 5 78 17t13 62v72h-260v28q182 271 300 426h40v-407h96v-47zM280 225v295h-2q-107 -148 -196 -295h198z" id="x34"></path></g><g transform="matrix(.017,0,0,-.017,26.683,10.8)"><path d="M528 54l-36 -38l-198 201l-198 -201l-36 38l197 200l-197 201l36 38l198 -202l198 202l36 -38l-197 -201z" id="xD7"></path></g>
</svg> larger than the stellar dynamical masses.</table>

Advances in Astronomy

fig1

Figure 1

Figure 1: A Principle Component Analysis of Galaxy Properties from  a Large, Gas-Selected Sample 