NAOC Open IR  > 月球与深空探测研究部
Merging galaxies with multiple nuclei from HST ULIRGs snapshot survey
Cui, J; Xia, XY; Deng, ZG; Mao, S; Zou, ZL; Schilizzi, RT; Vogel, SN; Paresce, F; Elvis, MS
2001
发表期刊GALAXIES AND THEIR CONSTITUENTS AT THE HIGHEST ANGULAR RESOLUTIONS
期号205页码:172-175
摘要We perform photometric measurements on a large HST snapshot imaging survey sample of 97 ultraluminous infrared galaxies (ULIRGs). We classify all the sources into three categories with multiple, double and single nucleus/nuclei, mainly based on a quantitative criterion of I-band luminosity. The resultant fractions of multiple, double and single nucleus/nuclei ULIRGs are 18%, 39% and 43%, respectively. This supports the multiple merger scenario as a possible origin of ULIRGs, in addition to the commonly-accepted. pair merger model. Further statistical studies indicate that the fraction of AGN increases from multiple (18%) to double (39%) and then to single (43%) nucleus/nuclei ULIRGs. For the single nucleus category, there is a high luminosity tail in the luminosity distribution, which corresponds to a Seyfert 1/QSO excess. This supports the statement that active galactic nuclei tend to appear at final merging stage. For multiple and double mergers, we also find a considerably high fraction of very close nucleus pairs (e.g., 2/3 for those separated by less than 5 kpc). This strengthens the conclusion that systems at late merging phase preferentially host ULIRGs.
收录类别ISTP ; SCI
语种英语
WOS记录号WOS:000175998000058
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文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8577
专题月球与深空探测研究部
作者单位1.Chinese Acad Sci, Beijing Astron Observ, Beijing 100012, Peoples R China
2.Chinese Acad Sci, Beijing Astron Ctr Natl Astron Observatories, Beijing 100012, Peoples R China
3.Tianjin Normal Univ, Dept Phys, Tianjin 300074, Peoples R China
4.Chinese Acad Sci, Grad Sch, Dept Phys, Beijing 100039, Peoples R China
5.Univ Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, England
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Cui, J,Xia, XY,Deng, ZG,et al. Merging galaxies with multiple nuclei from HST ULIRGs snapshot survey[J]. GALAXIES AND THEIR CONSTITUENTS AT THE HIGHEST ANGULAR RESOLUTIONS,2001(205):172-175.
APA Cui, J.,Xia, XY.,Deng, ZG.,Mao, S.,Zou, ZL.,...&Elvis, MS.(2001).Merging galaxies with multiple nuclei from HST ULIRGs snapshot survey.GALAXIES AND THEIR CONSTITUENTS AT THE HIGHEST ANGULAR RESOLUTIONS(205),172-175.
MLA Cui, J,et al."Merging galaxies with multiple nuclei from HST ULIRGs snapshot survey".GALAXIES AND THEIR CONSTITUENTS AT THE HIGHEST ANGULAR RESOLUTIONS .205(2001):172-175.
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