We first give the formula to calculate the infrared luminosity and stellar mass of galaxies by using Spitzer mid-infrared (Spitzer 8/24mu and 3.6/4.5mu) luminosities.. We also point out that submm band is not good to estimate the star formation rate..

Recently we construct a large sample of Low surface brightness galaxies(LSBGs), analyzing the their properties and exploring the reason of their low star formation efficiency.

1, PAH and Mid-Infrared Luminosities as Measures of Star Formation Rate in Spitzer First Look Survey Galaxies, Wu, Hong; et al., 2005, ApJ, 632, L79

2, Optical and Near-Infrared Color Profiles in Nearby Early-Type Galaxies and the Implied Age and Metallicity Gradients, Wu, Hong; Shao, Zhengyi; Mo, H. J.; Xia, Xiaoyang; Deng, Zugan, 2005, ApJ, 622,244

3, Intermediate-Band Surface Photometry of the Edge-on Galaxy NGC 4565, Wu, Hong; et al., 2002, AJ, 123, 1364

4, The Nature of Ultraluminous X-Ray Sources in NGC 4565, Wu, H.; Xue, S. J.; Xia, X. Y.; Deng, Z. G.; Mao, S., 2002, ApJ, 576, 738

5, A statistical study of the spectra of very luminous IRAS galaxies. II. Spectral and environmental analysis, Wu, H.; Zou, Z. L.; Xia, X. Y.; Deng, Z. G., 1998, A&AS, 132, 181

6, A statistical study of the spectra of very luminous IRAS galaxies. I. Data, Wu, H.; Zou, Z. L.; Xia, X. Y.; Deng, Z. G., 1998, A&AS,, 127, 521

7, Effects of Metallicity and AGN Activity on the Mid-Infrared Dust Emission of Galaxies, Wu, Hong; Zhu, Yi-Nan; Cao, Chen; Qin, Bo, 2007, ApJ, 668, 87

8, Correlations between Mid-Infrared, Far-Infrared, Hα, and FUV Luminosities for Spitzer SWIRE Field Galaxies, Zhu, Yi-Nan; Wu, Hong; Cao, Chen; Li, Hai-Ning, 2008, ApJ, 686., 155

9, Stellar mass estimation based on IRAC photometry for Spitzer SWIRE-field galaxies, Zhu, Yi-Nan; Wu, Hong; Li, Hai-Ning; Cao, Chen, 2010, RAA, 10, 329