GBT20B-468

The Gas Content of an Extremely Metal-Poor Galaxy in the nearby Universe

Abstract

Very low-mass galaxies in the nearby Universe are also very metal-poor. These galaxies offer opportunities to test galaxy evolution models in an extreme parameter space and probe star formation activity in ISM conditions similar to those in the early Universe. While of cosmological importance, such galaxies are challenging to find and the number of extremely metal-poor (XMP) nearby galaxies remains small. An exciting new XMP galaxy, J1005+3722, was recently identified via a unique search technique in SDSS. Follow-up HST imaging of the resolved stars in the galaxy provide a secure distance of 11.5 Mpc. Here, we request GBT time to measure the HI content in the galaxy, providing a crucial missing constraint on the galaxy properties. Combining the HI mass with existing measurements of the stellar and chemical content of J1005+3722 will shed light on the different possible chemical evolutionary pathways of XMP galaxies. We request a total observing time of 2.5 hours for this project, including all overheads and calibration.

Investigators

Name	Institution
Nissim Kanekar	Tata Institute of Fundamental Research
Kristen McQuinn *	Rutgers, The State University of New Jersey
Danielle Berg	Ohio State University; Texas at Austin, University of; Wisconsin at Milwaukee, University of
Grace Telford	Utah, University of

* indicates the PI