Herschel Observations of Major Merger Pairs at z=0: Dust Mass and Star
  Formation
  We present Herschel PACS $\&$ SPIRE far-infrared (FIR) and sub-mm imaging
observations for a large K-band selected sample of 88 close major-merger pairs
of galaxies (H-KPAIRs) in 6 photometric bands (70, 100, 160, 250, 350, and 500
$\mu m$). Among 132 spiral galaxies in the 44 spiral-spiral (S$+$S) pairs and
44 spiral-elliptical (S$+$E) pairs, 113 are detected in at least one Herschel
band. Star formation rate (SFR) and dust mass ($M_{\rm dust}$) are derived from
the IR SED fitting. Mass of total gas ($M_{\rm gas}$) is estimated by assuming
a constant dust-to-gas mass ratio of 0.01. Star forming spiral galaxies (SFGs)
in S$+$S pairs show significant enhancements in both specific star formation
rate (sSFR) and star formation efficiency (SFE), while having nearly the same
gas mass, compared to control galaxies. On the other hand, for SFGs in S$+$E
pairs, there is no significant sSFR enhancement and the mean SFE enhancement is
significantly lower than that of SFGs in S$+$S pairs. This suggests an
important role for the disc-disc collision in the interaction induced star
formation. The $M_{\rm gas}$ of SFGs in S$+$E pairs is marginally lower than
that of their counterparts in both S$+$S pairs and the control sample. Paired
galaxies with and without interaction signs do not differ significantly in
their mean sSFR and SFE. As found in previous works, this much larger sample
confirms the primary and secondary spirals in S+S pairs follow a Holmberg
effect correlation on sSFR.
