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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
The fractal dimension of the ρ Ophiucus molecular cloud complex
Journal of the Korean Astronomical Society, Volume 49, No. 6, Year 2016
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Description
We estimate the fractal dimension of the ρ Ophiuchus Molecular Cloud Complex, associated with star forming regions. We selected a cube (v, l, b) database, obtained with J = 1−0 transition lines of 12CO and 13CO at a resolution of 22ʺ using a multibeam receiver system on the 14-m telescope of the Five College Radio Astronomy Observatory. Using a code developed within IRAF, we identified slice-clouds with two threshold temperatures to estimate the fractal dimension. With threshold temperatures of 2.25 K (3σ) and 3.75 K (5σ), the fractal dimension of the target cloud is estimated to be D = 1.52-1.54, where P ∝ AD/2, which is larger than previous results. We suggest that the sampling rate (spatial resolution) of observed data must be an important parameter when estimating the fractal dimension, and that narrower or wider dispersion around an arbitrary fit line and the intercepts at NP = 100 should be checked whether they relate to rms noise level or characteristic structure of the target cloud. This issue could be investigated by analysing several high resolution databases with different quality (low or moderate sensitivity). © 2016. The Korean Astronomical Society. All rights reserved.
Authors & Co-Authors
Li, D. H.
China, Beijing
National Astronomical Observatories Chinese Academy of Sciences
Lee, Changhoon
South Korea, Daejeon
Korea Astronomy and Space Science Institute
Statistics
Citations: 4
Authors: 2
Affiliations: 3
Identifiers
Doi:
10.5303/JKAS.2016.49.6.255
ISSN:
12254614