Resovled Local (FIR-HCN) SF Law ? In Dense Gas (M51 & N6946)
70um maps & compared to HCN measurements Work in progress! Still far from the size scale of SSCs (by more than two orders of magnitude)
Baan, Henkel, Loenen et al. 2008 Baan et al. (2008) Kohno 2007, et al. (2003) Imanishi (2006) Aalto et al. 2007, 2002, 1995 Solomon et al. 1992 Nguyen et al. 1992 Henkel et al. 1990 Henkel, Baan, Mauersberger 1991 HCN,CS,HNC etc. in SF Gals.
Bigiel’s talk @SFR50 SF thresholds may simply reflect the change of the dominant cold gas phase in galaxies from HI ->H2 & from H2->denseH2
Summary Dense Cores in Dense Molecular Gas Complexes High Mass Stars & SSCs -> SFR (FIR-HCN Linear Correlation) SFR ~ M(DenseH2): the dense gas mass in galaxies & all star-forming systems? SF thresholds: change of the dominant cold gas phase in galaxies from HI ->H2 & from H2->denseH2 SFR: Counting Dense Cores/SSCs in Galaxies? HI (LSBs) H2 (Spiral disks) denseH2 (starbursts/ULIRGs) Stars/SSCs Resolved local correlations are the key SFR
FIR-radio vs. FIR-HCN correlations FIR, radio continuum (RC), HCN & CO FIR-RC > FIR/RC-HCN > FIR/RC-CO Stars Death SN/SNRs RC Stars Form UV/dust FIR CO HCN SF FIR RC FIR-RC & FIR-HCN corr. the strongest! Comparison of different SFR indicators Differ both spatially and temporally