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We present new ultraviolet (UV) observations of the luminous compact bluegalaxy KISSR242, obtained with the HST-COS. We identify multiple resolvedsub-arcsecond near-UV sources within the COS aperture. The far-UV spectroscopicdata show strong outflow absorption lines, consistent with feedback processesrelated to an episode of massive star-formation. OI, CII, and SiII--SiIV areobserved with a mean outflow velocity v_{out} = -60 km/s. We also detect faintfine-structure emission lines of singly ionized silicon for the first time in alow-redshift starburst galaxy. These emissions have been seen previously indeep Lyman break galaxy surveys at z ~ 3. The SiII* lines are at the galaxyrest velocity, and they exhibit a quantitatively different line profile fromthe absorption features. These lines have a width of ~ 75 km/s, too broad forpoint-like emission sources such as the HII regions surrounding individual starclusters. The size of the SiII* emitting region is estimated to be ~ 250 pc. Wediscuss the possibility of this emission arising in overlapping super starcluster HII regions, but find this explanation to be unlikely in light ofexisting far-UV observations of local star-forming galaxies. We suggest thatthe observed SiII* emission originates in a diffuse warm halo populated byinterstellar gas driven out by intense star-formation and/or accreted during arecent interaction that may be fueling the present starburst episode inKISSR242.

Diffuse Far-UV Line Emission from the Low-Redshift Lyman Break Galaxy Analog KISSR242