The 2mass Redshift Survey—description and Data Release

Abstract

We present the results of the 2MASS Redshift Survey (2MRS), a ten-year project to map the full three-dimensional distribution of galaxies in the nearby Universe. The 2 Micron All-Sky Survey (2MASS) was completed in 2003 and its final data products, including an extended source catalog (XSC), are available on-line. The 2MASS XSC contains nearly a million galaxies with K s ≤ 13.5 mag and is essentially complete and mostly unaffected by interstellar extinction and stellar confusion down to a galactic latitude of |b| = 5 • for bright galaxies. Near-infrared wavelengths are sensitive to the old stellar populations that dominate galaxy masses, making 2MASS an excellent starting point to study the distribution of matter in the nearby Universe.We selected a sample of 44,599 2MASS galaxies with K s ≤ 11.75 mag and |b| ≥ 5 • (≥ 8 • towards the Galactic bulge) as the input catalog for our survey. We obtained spectroscopic observations for 11,000 galaxies and used previously-obtained velocities for the remainder of the sample to generate a redshift catalog that is 97.6% complete to well-defined limits and covers 91% of the sky. This provides an unprecedented census of galaxy (baryonic mass) concentrations within 300 Mpc.Earlier versions of our survey have been used in a number of publications that have studied the bulk motion of the Local Group, mapped the density and peculiar velocity fields out to 50 h −1 Mpc, detected galaxy groups, and estimated the values of several cosmological parameters.Additionally, we present morphological types for a nearly-complete sub-sample of 20,860 galaxies with K s ≤ 11.25 mag and |b| ≥ 10 • .

The Massive Survey. Iv. The X-Ray Halos of the Most Massive Early-Type Galaxies in the Nearby Universe

“…The selection and sample properties are described in detail in Ma et al (2014); we summarize salient details here for completeness. To emulate a stellar-mass selection, we select galaxies from the Two Micron All Sky Survey (2MASS) Redshift Survey (2MRS; Huchra et al 2012) that are brighter than a total K-band magnitude limit of…”

Anisotropy Search in Energy Distribution in the Northern Hemisphere Using the Telescope Array Surface Detector Data

“…To model observed differences in energy distributions in Monte Carlo, we performed simulations using a propagation code CRPropa2.2.0.4 [8] and the source distribution from the 2MRS catalogue [9] using the density profile calculation described in [10]. Fig.…”

Star-forming compact groups (SFCGs): an ultraviolet search for a local sample

“…Knowing that in the 2r phy -z g diagram the angular size is represented by the slope of the trend, the dispersed relation of the HCG sample is explained the broader range of angular sizes found for the HCG sample. The 2MCG sample presents a more restricted redshift range below z∼0.05 for being a velocityfiltered group sample mainly retrieved from the 2MASS Redshift Survey (Huchra et al 2012) with a similar depth in redshift. Although the 2MCG sample is defined with the same compactness criterion, with a group K-band surface brightness threshold meant to match the R-band threshold of Hickson (1982), the 2MCGs are somewhat less compact.…”