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Galactic structure studies with SCUSS and SDSS surveys

Published online by Cambridge University Press:  17 July 2013

Cuihua Du  and
Xiyan Peng
Cuihua Du
Affiliation:
College of Physical Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China email: ducuihua@ucas.ac.cn
Xiyan Peng
Affiliation:
College of Physical Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China email: ducuihua@ucas.ac.cn National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
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Abstract

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Based on the South Galactic Cap U-band Sky Survey (SCUSS) and SDSS observations, we adopted the star-count method to analyze the stellar distribution in different directions of the Galaxy. We find that the scale height of the disk may be variable with the observed direction, which cannot simply be attributed to statistical errors. The main reason can be possibly attributed to the disk (mainly the thick disk) being flared, with a scale height increasing with radius. The axis ratio of the Galactic halo is in the range 0.4-0.6. This finding supports Galactic models with a flattened inner halo, partly formed through a merger early in the Galaxy's history.

Keywords

Galaxy: fundamental parametersGalaxy: haloGalaxy: stellar componentGalaxy: structure
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S295: The intriguing life of massive galaxies , August 2012 , pp. 309 - 310
Copyright
Copyright © International Astronomical Union 2013 

References

Du, C. H., Zhou, X., Ma, J., et al. 2003, A&A, 407, 541Google Scholar
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Du, C. H., Wu, Z. Y., Ma, J., & Zhou, X. 2008, ChJAA, 5, 566Google Scholar
Juric, M., Ivezic, Z., Brooks, A., et al. 2008, ApJ, 673, 864Google Scholar