| Evidence for CII diffuse line emission at redshift z~2.6 |
| Shengqi Yang, NYU |
| Event Type: Informal Astro Talk |
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| Time: 2:00 PM - 3:00 PM |
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| Location: 726 Broadway, 940, CCPP Seminar |
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| Abstract: CII is one of the brightest emission lines from star-forming galaxies and is an excellent tracer for star formation. In this work we report a detection of excess of excess emission in the 545 GHz Planck band separate from the cosmic infrared background presented in the 353-857 GHz Planck bands. This excess is consistent with redshifted CII emission, in which case we report bCII*ICII=2.0(+1.2)(-1.1)*10^5 Jy/sr at 95% confidence, which strongly favors many collisional excitation models for CII emission. Our detection shows strong evidence for a model with a non-zero CII parameter, through line intensity mapping observations at high spectral resolution will be needed to confirm this result. We will apply this cross-correlating strategy in EXCLAIM, a future intensity mapping survey which aims to measure the integrated CO and CII emission in 0 |