Revealing distribution of galaxies in the Great Attractor region behind Milky Way

Research Project

Project/Area Number	21740138
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Single-year Grants
Research Field	Astronomy
Research Institution	Nagoya University
Principal Investigator	NAGAYAMA Takahiro 名古屋大学, 理学研究科, 特任助教 (00533275)
Project Period (FY)	2009 – 2011
Project Status	Completed (Fiscal Year 2011)
Budget Amount *help	¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000) Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000) Fiscal Year 2010: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000) Fiscal Year 2009: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords	赤外線 / 銀河 / サーベイ / 赤外線天文学 / 銀河分布 / グレートアトラクター / 特異運動
Research Abstract	We carried out a galaxy survey for 37. 5 sq. degrees of the Great Attractor region in the low galactic latitude(l<5deg), and have detected 4360 galaxies. In this region, existence of rich clusters of galaxies, ABELL3627 and CIZA1324. 7-5736, are already known. We could not find any rich clusters like ABEL3627 or CIZA1324. 7-5736 in our survey. Comparison of luminosity function shows that obvious enhancement of number of galaxies around Ks～10mag. This enhancement corresponds to mass of～1015 solar mass. This value is consistent with recent studies based on HI or X-ray observation, but approximately 10 times smaller than original mass of Great Attractor.

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