19-22 October 2011
Hotel Roanoke, Roanoke VA
US/Eastern timezone
<font color=red><b>To upload your file, log in (@ top right), then click on your talk title, then click "Add Material" at the bottom of the page.</b></font>

The Arcminute Morphology of the WIM Toward the Local Perseus Arm of the Galaxy

21 Oct 2011, 18:00
2h
Roanoke Foyer (Hotel Roanoke, Roanoke VA)

Roanoke Foyer

Hotel Roanoke, Roanoke VA

Speaker

Phillip Nelson (Virginia Tech)

Description

We used the Virginia Tech Spectral-Line Imaging Camera (SLIC) to image the warm ionized interstellar medium (WIM) toward the Local Perseus Arm. We obtained a series of images, each of which is 10 degree-wide, and has arcminute-resolution. The images show three basic types of structures --- compact clouds with diameters greater than several degrees, those that are 1 degree or less in diameter, and extended filaments which span several degrees in length but have thicknesses of only a few tens of arcminutes. The data show that [S II]/H-alpha ratios are, on average, nearly six times higher in the filaments than in the clouds, which indicates that emission from collisionally excited, singly-ionized S^+ is the dominant emission source within the filaments. In clouds, the lower [S II]/H-alpha values are evidence that the H-alpha recombination line of photoionized hydrogen dominates.

Presentation Materials

There are no materials yet.
Your browser is out of date!

Update your browser to view this website correctly. Update my browser now

×