A Study of Large Scale structures of Galaxy Distribution in the Local Universe by means of Galaxy search in the Milky Way Region

银河系区域星系搜索研究本地宇宙星系分布的大尺度结构

• 批准号: 06452022
• 负责人: SAITO Mamoru
• 金额: $ 4.93万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06452022/
• 关键词: Local Universe; Large Scale structure; Galaxy search; Milky Way; 銀河; 宇宙の大規模構造; 天の川領域; 近傍宇宙; 銀河分布の大規模構造

In order to clarify the large-scale structures of galaxy distribution of the Local Universe behind the Milky Way, we performed two systematic search for galaxies in this region.(1) A search for IRAS galaxies behind the Milky Way (1994-1996)IRAS galaxies are defined to have flux densities larger than 0.6 Jy at 60 mum. At far-infrared wavelengths Galactic extinction is so low that detection of IRAS galaxies is possible even at the Milky Way region. We picked up IRAS point sources with far-infrared features similar to known IRAS galaxies and identified optically galaxy-like objects on the positions of the far-infrared point souces. Then we carried out a redshift survey of the galaxy candidates as many as possible.Our results show the presence of five filamentary structures of galaxy distribution almost vertically crossing the Milky Way, a galaxy cluster at Puppis with about 2000 km/s, and a large-scale structure with a size of 100 Mpc along X-axis of the supergalctic coordinate. We also clarify the structure of the Local Void.(2) A visual search for galaxies at the Galactic center region (1995-1996)The results of the IRAS galaxy search also indicate an apparent largy nearby void toward the Galactic center. To ascertain the reality of the void, we carried out a visual search for galaxies by means of Schmidt plates and a microscope with a large movable stage, which was obtained by this Grant-in-Aid. We detected about 12000 galaxy candidates in about 1050 square degrees surveryed. Now we are going to carry out a redshift survery of these objects. We may clarify large-scale structures in this region by the follow-up redshift survery.

为了阐明银河系后面本地宇宙的星系分布的大规模结构，我们在该地区进行了两个系统的搜索。（1）搜索银河系后面的IRAS星系（1994-1996）IRAS星系被定义为在60 mum的0.6 Jy大于0.6 Jy的磁通密度。在远红外的波长下，银河灭绝是如此之低，以至于在银河系区域即使在银河系中也可能发现IRAS星系。我们以类似于已知的IRA的星系相似的远红外特征来拾取IRAS点源，并在远红外点Souces的位置上确定了光学的类似星系的对象。然后，我们对尽可能多的星系候选者进行了红移调查。您的结果显示，存在五个丝状分布的丝状结构，几乎垂直越过银河系，一个大约2000 km/s的Puppis的星系群，大约2000 km/s，大型结构，沿X-XAXIS沿x-akasis x-axiss x-axiss x-axiss the Expergalctic Coildrictic sortiartic coildractic sordiactic coildractic sorigrioncortic seprolctic sorigriation。我们还阐明了局部空隙的结构。（2）在银河系中心区域（1995-1996）对星系的视觉搜索搜索，IRAS Galaxy搜索的结果还表明，在银河系中心，附近有一个明显的较大的空隙。为了确定空隙的现实，我们通过施密特板和具有大型移动阶段的显微镜进行了视觉搜索，这是由该拨款中的拨款获得的。我们在大约1050平方英尺的探测中检测到约12000个星系候选者。现在，我们将对这些物体进行红移的探索。我们可以通过后续的红移验证来阐明该地区的大规模结构。

项目成果

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Chamaraux, P. 等人：“寻找 Traurus 分子云后面的 IRAS 星系”Astron.Astrophys.299。

Chamaraux, P. et al.: "A search for IRAS galaxies behind the Taurus molecular clouds" Astron. Astrophys.299. 347-352 (1995)

Chamaraux, P. 等人：“寻找金牛座分子云后面的 IRAS 星系”Astron。

Adel T.Roman: "A Search for Galaxies behind the Milky Way at Aguils and Sagittarius" Publication of the Astronomical Society of Japan. 48・5. 679-690 (1996)

Adel T.Roman：“寻找阿吉尔斯和人马座银河系背后的星系”，日本天文学会出版物 48・5（1996 年）。

Iwata, I. et al.: "A Near-Infrared Imaging Search for Invisible Galaxies behind the Milky Way" Publ. Astron. Soc. Japan,. 49. 47-58 (1997)

Iwata, I. 等人：“近红外成像搜索银河系后面的隐形星系”Publ。

Kouichiro Nakanishi: "Search and Redshift Survey for IRAS Galaxies behind the Milky Way and the Stucture of the Local Void" The Astrophysical Journal,Supplemant Series. (accepted). (1997)

Kouichiro Nakanishi：“银河系背后的 IRAS 星系的搜索和红移调查以及局部空洞的结构”《天体物理学杂志》增刊系列。