Green Bank Telescope 21-cm Observations of Galaxies with Supernova Distances
Abstract
We present an update on the data collection and analysis pipeline for an ongoing project of the Undergraduate ALFALFA Team, for which the primary science objective is to generate a well defined template Baryonic Tully-Fisher Relation. Using the Green Bank Telescope, we observe and measure the HI 21-cm emission line profiles of each of the galaxies in the Observing Sample (GBT22A-430) which comprises 220 galaxies from a total sample of around 330 supernova host galaxies with accurately known distances from the Democratic Samples of Supernovae (Stahl et al. 2021). The remaining galaxies in our total sample have been observed previously and the archival HI 21-cm spectral data is accessible to our team. We will be focusing on the Observing Sample here and we show: (1) progress to date on obtaining the galaxy HI 21-cm measurements; (2) preliminary outcomes of our newly developed analysis tools and (3) statistical analysis of the sample signal-to-noise, including non-detections, as a function of galaxy distance.
- Publication:
-
American Astronomical Society Meeting Abstracts
- Pub Date:
- January 2023
- Bibcode:
- 2023AAS...24130606M