NOAO >   Observing Info >   Approved Programs >   2018A-0356

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Program Information for 2018A-0356


PI: Julia Healy, University of Groningen, healy@astro.rug.nl
Address: Kapteyn Astronomical Institute, Landleven 12, Groningen 9747AD The Netherlands

CoI: Sarah-Louise Blyth, University of Cape Town
CoI: Marc Verheijen, University of Groningen

Title: The evolution of HI gas in cluster substructure

Abstract: The Coma Cluster, a rich and diverse nearby galaxy cluster, provides the ideal $zsim 0$ laboratory to study environment-driven evolution in action. Using high resolution and sensitivity hi data obtained from the Westerbork Synthesis Radio Telescope as part of the Westerbork Coma Survey, in combination with other available multi-wavelength data, our aim is to study the hi gas in galaxies in not only the cluster core, but also the south-west infall region to investigate the processes driving galaxy evolution in these regions. Since galaxies in dense environments are known to be deficient in hi gas, it is necessary to make use of the statistical technique known as hi stacking to probe the average hi content for samples of galaxies which may lie below the hi detection threshold. The success of hi stacking depends on accurate optical redshifts to align the hi emission lines before co-adding. We aim to study the average hi content of Coma galaxies as a function of environment and distance from the cluster centre using hi stacking in a bid to uncover the processes driving galaxy evolution. In this project, we target the outskirts of the Coma Cluster for spectroscopy with WIYN/HYDRA. The cluster outskirts, where Coma is known to contain blue gas-rich galaxies, are currently spectroscopically under-sampled. This spectroscopy is vital to complete our picture of Coma's overall galaxy population and the evolutionary processes at play.

Program Type: Standard/Extragalactic

Scheduled Nights:
Run 1 (2018A):  WIYN/HYDR -- 2n on Apr 19 - Apr 20 2018


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NOAO >   Observing Info >   Approved Programs >   2018A-0356

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