The 2MASS Redshift Survey in the Zone of Avoidance

TL;DR

This paper presents the final data release of the 2MASS Redshift Survey, providing redshifts for all galaxies in the catalog, including the previously missing data in the Zone of Avoidance, to improve large-scale structure mapping.

Contribution

The paper delivers the complete redshift data for the 2MASS Redshift Survey, filling gaps in the Zone of Avoidance for better cosmic structure analysis.

Findings

Redshifts for 1041 previously missing galaxies provided.

Updated measurements for 27 galaxies included.

Enhanced uniformity in all-sky galaxy redshift data.

Abstract

The 2MASS Redshift Survey was started two decades ago with the goal of mapping the three-dimensional distribution of an all-sky flux-limited (Ks<11.75 mag) sample of ~45,000 galaxies. Our first data release (Huchra et al. 2012) presented an unprecedented uniform coverage for most of the celestial sphere, with redshifts for ~98% of our sample. However, we were missing redshifts for ~18% of the catalog entries that were located within the "Zone of Avoidance" (|b|<10 deg) -- an important region of the sky for studies of large-scale structure and cosmic flows. In this second and final data release, we present redshifts for all 1041 2MRS galaxies that previously lacked this information, as well as updated measurements for 27 others.