期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 793, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/793/1/L19
关键词
galaxies: fundamental parameters; galaxies: spiral; galaxies: structure; methods: numerical; methods: observational
资金
- Mexican institution CONACYT
- CONACYT
Based on integral field spectroscopy data from the CALIFA survey, we investigate the possible dependence of spiral arm pitch angle with optical wavelength. For three of the five studied objects, the pitch angle gradually increases at longer wavelengths. This is not the case for two objects where the pitch angle remains constant. This result is confirmed by the analysis of SDSS data. We discuss the possible physical mechanisms to explain this phenomenon, as well as the implications of the results.
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