2MTF III. HI 21cm observations of 1194 spiral galaxies with the Green Bank Telescope

TL;DR

This paper reports HI 21cm observations of 1194 inclined spiral galaxies from the 2MASS Redshift Survey using the Green Bank Telescope, aiming to improve Tully-Fisher distance estimates and study local Universe velocities.

Contribution

It provides a large dataset of HI measurements for nearly 500 galaxies suitable for Tully-Fisher analysis, enhancing the understanding of galaxy distances and velocities.

Findings

Detected HI in 727 galaxies.

Measured high-quality HI profiles in 484 galaxies.

Contributed to the 2MASS Tully-Fisher survey data.

Abstract

We present HI 21cm observations of 1194 galaxies out to a redshift of 10,000 km/s selected as inclined spirals (i>60deg) from the 2MASS Redshift Survey. These observations were carried out at the National Radio Astronomy Observatory Robert C. Byrd Green Bank Telescope (GBT). This observing program is part of the 2MASS Tully-Fisher (2MTF) survey. This project will combine HI widths from these GBT observations with those from further dedicated observing at the Parkes Telescope, from the ALFALFA survey at Arecibo, and S/N>10 and spectral resolution, v_res < 10km/s published widths from a variety of telescopes. We will use these HI widths along with 2MASS photometry to estimate Tully-Fisher distances to nearby spirals and investigate the peculiar velocity field of the local Universe. In this paper we report on detections of neutral hydrogen in emission in 727 galaxies, and measure good signal-to-noise and symmetric HI global profiles suitable for use in the Tully-Fisher relation in 484.