Events Calendar
Predictions of the statistical robustness of the measurements of the Neutral Hydrogen Mass Function and cosmic HI density
Thursday December 1, 2016
| 2:00 pm
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Presenter: | Monica Sanchez, UNM |
|---|---|---|
| Series: | Center for Astrophysics Research and Technologies Seminar Series | |
| Abstract: | Hydrogen is the fuel for star formation, but relatively little is known about the role of cold gas in galaxy evolution. The COSMOS H I Large Extragalactic Survey (CHILES) is an on-going deep H I survey being conducted with the VLA, probing a region within the COSMOS field in the 21cm line of neutral hydrogen. CHILES is the first survey to observe H I in emission from z=0 to z~0.5. This allows us to observe the content, morphology and kinematics of H I in relation to stellar disks, and how it may have evolved over this period. I will present a simulation of the galaxy detections that could be made by the survey, based on multi-wavelength data from the COSMOS dataset in the VLA field of view. These were then used to calculate a Neutral Hydrogen Mass Function (HIMF), which describes the space density of galaxies as a function of their H I mass, and the cosmic HI density. I discuss the statistical robustness of these values we are capable of deriving for the entire survey, and as a function of redshift and environment. | |
| Location: | PAIS-2540, PAIS | |
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