Large Scale Structure in the Local Universe — The 2MASS Galaxy Catalog

Publications of the Astronomical Society of Australia

Thomas Jarrett¹ 

关键词: general: galaxies;    fundamental parameters: infrared;    galaxies: clusters;    surveys: astronomical;   

DOI  :  10.1071/AS04050

学科分类：天文学(综合)

来源: CSIRO

【 摘 要 】

Using twin ground-based telescopes, the Two-Micron All Sky Survey (2MASS) scanned both equatorial hemispheres, detecting more than 500 million stars and resolving more than 1.5 million galaxies in the near-infrared (1–2.2 μm) bands. The Extended Source Catalog (XSC) embodies both photometric and astrometric whole sky uniformity, revealing large scale structures in the local Universe and extending our view into the Milky Way's dust-obscured ‘Zone of Avoidance’. The XSC represents a uniquely unbiased sample of nearby galaxies, particularly sensitive to the underlying, dominant, stellar mass component of galaxies. The basic properties of the XSC, including photometric sensitivity, source counts, and spatial distribution, are presented here. Finally, we employ a photometric redshift technique to add depth to the spatial maps, reconstructing the cosmic web of superclusters spanning the sky.

【 授权许可】

Unknown