GBT23B-308

HI Observations of Giant Low Surface Brightness Galaxies

Abstract

Giant low surface brightness disc galaxies (gLSBs) are rare objects with disc radii up to 130 kpc and total masses of 10^12 solar masses. They challenge currently accepted theories of galaxy formation and evolution, because it is difficult to build-up such large dynamically cold systems via mergers while preserving such extended discs. Recently we significantly extended a sample of gLSB galaxies by visual inspecting of 120 sq. deg. covered by deep Hyper Suprime-Cam data and found 42 new gLSB systems (Saburova et al. 2022). Here we propose a pilot HI observations of 4 gLSBs aiming to determine their neutral atomic hydrogen gas content and dark matter fraction derived from the rotation of the galaxies.

Investigators

Name	Institution
Philip Lah *	Abu Dhabi, New York University
Joseph Gelfand	New York University; National Science Foundation ; Abu Dhabi, New York University
Ivan Katkov	Abu Dhabi, New York University

* indicates the PI