Other
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21541220m&link_type=abstract
American Astronomical Society, AAS Meeting #215, #412.20; Bulletin of the American Astronomical Society, Vol. 42, p.249
Other
Scientific paper
New VLA HI spectral line observations of ESO400-G043 are presented. This low mass ( 1.5x109 Solar Masses) system is of interest for studies of Lyman-alpha propagation in galaxies due to its relative proximity ( 83 Mpc) and its elevated star formation rate. HI gas kinematics are theorized to be a key factor affecting Ly-α propagation in the ISM: static neutral gas will aide resonant scattering and the efficient absorption of Ly-α photons by dust, while outflowing neutral gas reduces the efficiency of resonant scattering and thus favors the escape of Ly-α photons. Previous HST observations of ESO400-G043 have revealed a strong, asymmetric Ly-α emission line. Our new VLA observations show significant tidal HI gas between ESO400 and its companion galaxy (2MASX J20375125-3529431). These results support the kinematic model described above and are similar to the HI properties of other Ly-a emitting starburst galaxies published in Cannon et al. (2004) and described in the companion poster by Weindling et al.
Cannon John M.
Meitzner Seth
Skillman Evan
Walter Fabian
Weindling Jacob
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