Timothy M. Heckman
= Timothy M. Heckman
{c}
<Timothy M. Heckman> investigates how activity in <galaxies> drives large outflows of <gas>. His team used <sodium> absorption <spectral lines> in infrared-bright <starburst galaxies> to detect material moving toward the observer relative to each <galaxy>'s overall <velocity>.
Absorption samples <gas> in front of the emitting background. A systematic <blueshift> can therefore reveal an outflow on the near side. The study found strongly shifted lines in twelve systems and argued, using their viewing geometry, that ambient <gas> was being accelerated along the minor axis by a hot starburst-driven <galactic wind>. Associated reddening also linked the outflow to <interstellar dust> transport.<Absorption-Line Probes of Gas and Dust in Galactic Superwinds by Timothy M. Heckman and others>[Abstract: Na D sample, blueshifts, orientation and dusty outflow interpretation]{ref}