The spectral properties of a large sample of low surface brightness disk galaxies

摘要：

We present the spectral properties of a large sample of nearly face-on low surface brightness (LSB) disk galaxies selected from the SDSS-DR4 main galaxy sample. About 12,282 LSB galaxies have been selected from the photometry database with their B-band central sur face brightness μo(B) ranging from 22 to 24.5 mag arcsec-2. About 7000 of such LSBGs have measured emission　lines(OⅡ3727,OⅢ5007,Hβ,Hα,N Ⅱ6583)with the S/N ratio greater than 5σ.Their spectral diagnostic diagram ofNⅡ／Fα vs.OⅢ／Hβ shows that～89％　of them　are star-forming galaxies,and～11％　could be classified as AGNs.The relations of μ0(B)　vs.12+log(O／H) and μ0(B)vs ,stellar masses M* of these star-forming LSB galaxies show that their O／H and M* increase following the increasing μ0(B).The majority of these LSBGs are on the higher branch of metallicity.

关键词： Galaxies:abundances galaxies:evolution galaxies:fundamental parameters galaxies:spiral galaxies:starburst

作者: Y.C.Liang G.H.Zhong L.C.Deng B.Zhang

作者单位: National Astronomical Observatories,Chinese Academy of Sciences,Beijing,100012,China National Astronomical Observatories,Chinese Academy of Sciences,Beijing,100012,China;Department of P

会议类型: 国际会议

会议名称: The 252th Symposium of the International Astronomical Union(国际天文学联合会第252届研讨会)

会议地点: 海南三亚

会议语种:英文

页码: 119-120

在线出版日期: 2008-04-06（万方平台首次上网日期，不代表论文的发表时间）