NOAO >   Observing Info >   Approved Programs >   2020A-0167

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Program Information for 2020A-0167


PI: Ralf Kotulla, U. of Wisconsin, Madison, kotulla@wisc.edu
Address: Department of Astronomy, 475 N Charter St, Madison, WI 53706 United States

CoI: Jay Gallagher, U. of Wisconsin, Madison
CoI: Elena D'Onghia, U. of Wisconsin, Madison
CoI: Under Graduate, U. of Wisconsin, Madison

Title: Giant-Dwarf galaxy interactions as channel of galaxy pre-processing in groups

Abstract: The local environment a galaxy resides in is a major contributor governing its evolution, exemplified by the drastically different mix of galaxy types in the low-density field as compared to dense galaxy clusters. Intermediate density regions such as galaxy groups thus present a key laboratory to catch and study many of the underlying physical processes in action. Some properties of cluster galaxies, such as an overall tendency to be dynamically hot, requires a factor that affects some galaxies before they enter the cluster. This is usually understood in terms of pre-processing, environmental factors that impact galaxies as they are infalling to clusters. Although the details of pre- processing are yet to be clearly identified, it most likely takes the form of galaxy-galaxy and galaxy-group interactions as galaxy groups approach clusters textit{which most strongly affect dwarfs}. Our project thus focuses on detecting and mapping stellar debris associated with interactions in several galaxy groups to place constraints on preprocessing of dwarf and giant galaxies. Targets are chosen based on their location on and off the supergalactic plane and outside the sphere of influence of nearby galaxy clusters to enable a comprehensive study of pre-processing across a wide range of environments.

Program Type: Standard/Extragalactic

Scheduled Nights:
Run 1 (2020A):  CT-4m/DECam -- 3n on Jun 25 - Jun 27 2020


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NOAO >   Observing Info >   Approved Programs >   2020A-0167

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