GBT22A-430

The Baryonic Tully-Fisher Relation for Galaxies with Supernova Distances

Abstract

The Baryonic Tully-Fisher Relation (BTFR), an empirical scaling relation that appears to link the baryonic mass of a disk galaxy to its rotational velocity, is used both to constrain models of how baryons inhabit their host halos and, of particular relevance to this proposal, to estimate galaxy distances. The comparison of redshifts expected for those estimated distances in pure Hubble flow with observed redshifts yields peculiar velocities which in turn can be used to probe the large-scale gravitational field. Using the BTFR to trace mass distributions requires a robustly determined template BTFR whose scatter is minimized, and well understood. Yet current templates are limited in their understanding of their uncertainties either due to small sample sizes or large distance uncertainties. Thus, we propose HI 21 cm line observations of 220 galaxies which have accurate distance measurements derived from the supernovae they host. These observations will allow for the construction of a well understood, minimal scatter template BTFR.

Investigators

Name	Institution
Joseph Ribaudo *	Providence College
Rebecca Koopmann	Union College
Katherine Rabidoux	West Virginia University; Wisconsin-Platteville, University of
David Sukow	Washington and Lee University
Martha Haynes	Cornell University
D.J. Pisano	Cape Town, University of
Katherine Kudla	Providence College
Lukas Leisman	Cornell University; Valparaiso University
Thomas Balonek	Colgate University
Haille Perkins	St. Lawrence University
Nicholas Volk	Hartwick College
Jonathan Letai	Cornell University
Jonathan Gomez Barrientos	Cornell University
Michael Jones	Arizona, University of
Cian Bell	Washington and Lee University
Catherine Ball	Cornell University; Macalester College
Parker Troischt	Hartwick College
John Cannon	Macalester College
Aileen O'Donoghue	St. Lawrence University

* indicates the PI