ISM conditions in z~0.2 Lyman-Break Analogs
  We present an analysis of far--infrared (FIR) [CII] and [OI] fine structure
line and continuum observations obtained with $Herschel$/PACS, and CO(1-0)
observations obtained with the IRAM Plateau de Bure Interferometer, of Lyman
Break Analogs (LBAs) at $z\sim 0.2$. The principal aim of this work is to
determine the typical ISM properties of $z\sim 1-2$ Main Sequence (MS)
galaxies, with stellar masses between $10^{9.5}$ and $10^{11}$ $M_{\odot}$,
which are currently not easily detectable in all these lines even with ALMA and
NOEMA. We perform PDR modeling and apply different IR diagnostics to derive the
main physical parameters of the FIR emitting gas and dust and we compare the
derived ISM properties to those of galaxies on and above the MS at different
redshifts. We find that the ISM properties of LBAs are quite extreme (low gas
temperature, high density and thermal pressure) with respect to those found in
local normal spirals and more active local galaxies. LBAs have no [CII] deficit
despite having the high specific star formation rates (sSFRs) typical of
starbursts. Although LBAs lie above the local MS, we show that their ISM
properties are more similar to those of high-redshift MS galaxies than of local
galaxies above the main sequence. This data set represents an important
reference for planning future ALMA [CII] observations of relatively low-mass MS
galaxies at the epoch of the peak of the cosmic star formation.
