Far-Infrared and submillimeter properties of SDSS galaxies in the Herschel ATLAS science demonstration phase field

被引:6
|
作者
Lam, Man I. [1 ,2 ,3 ]
Wu, Hong [1 ,3 ]
Zhu, Yi-Nan [1 ,3 ]
Zhou, Zhi-Min [1 ,2 ,3 ]
机构
[1] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
[3] Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China
基金
中国国家自然科学基金; 美国国家航空航天局; 美国国家科学基金会;
关键词
galaxies: formation; galaxies: statistics; galaxies: structure; infrared: galaxies; STAR-FORMING GALAXIES; DIGITAL SKY SURVEY; FORMATION RATE INDICATORS; ACTIVE GALACTIC NUCLEI; HUBBLE SEQUENCE; H-ALPHA; NEARBY GALAXIES; FORMATION RATES; IRAS GALAXIES; INTERSTELLAR MATTER;
D O I
10.1088/1674-4527/13/2/005
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Using the Herschel ATLAS science demonstration phase data cross-identified with SDSS DR7 spectra, we select 297 galaxies with F-250 mu m > 5 sigma. The sample galaxies are classified into five morphological types, and more than 40% of the galaxies are peculiar/compact galaxies. The peculiar galaxies show higher far-infrared/submillimeter luminosity-to-mass ratios than the other types. We perform and analyze the correlations of far-infrared/submillimeter and H alpha luminosities for different morphological types and different spectral types. The Spearman rank coefficient decreases and the scatter increases with the wavelength increasing from 100 mu m to 500 mu m. We conclude that a single Herschel SPIRE band is not good for tracing star formation activities in galaxies. AGNs contribute less to the far-infrared/submillimeter luminosities and do not show a difference from star-forming galaxies. However, the earlier type galaxies present significant deviations from the best fit of star-forming galaxies.
引用
收藏
页码:179 / 196
页数:18
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