| Speaker: | John Silverman (Kavli IPMU) |
|---|---|
| Title: | Star formation, gas and the ISM of high-z starburst galaxies |
| Date (JST): | Thu, May 28, 2015, 13:30 - 14:30 |
| Place: | Seminar Room A |
| Abstract: | It is currently unclear whether galaxies with the highest rates of star formation, at the peak cosmic epoch of stellar growth, convert gas into stars in a mode dissimilar to the majority that lie in a star-forming "main sequenceʺ. Such outliers may simply be gas rich or have a higher efficiency of converting gas to stars possibly similar to local ULIRGs and maybe even driven by major mergers of massive galaxies. We report on spectroscopic observations with ALMA and IRAM/PdBI of seven such cases to detect the molecular CO emission line, a tracer of the total gas content. Our sample is based on a large near-infrared spectroscopic survey of star-forming galaxies at z 〜 1.6 in COSMOS using Subaru/FMOS. SFRs are measured using multiple indicators (UV, far-IR and Halpha). The NIR spectra further enable us to characterize the chemical enrichment, ionization state and dust content of the interstellar medium (ISM). We will discuss further efforts to use both FMOS and ALMA for studying the ISM of high redshift galaxies. |
