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 _ { dust } ) are derived from the IR SED fitting .
Mass of total gas ( M _ { 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 _ { 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 .