研究目的
To provide a catalog of low-mass dense cores observed at 350 μm with high angular resolution using SHARC-II, complementing existing surveys and improving protostellar classification.
研究成果
The catalog provides high-resolution 350 μm data for 164 sources, showing SHARC-II is effective for protostellar cores but biased against starless cores. The observations improve protostellar classification by enabling accurate calculation of Tbol and Lsmm/Lbol, with implications for understanding star formation evolution.
研究不足
Lower sensitivity to extended emission compared to Herschel, heterogeneous dataset in sensitivity, detection bias against starless cores, and potential underestimation of flux densities for extended sources.
1：Experimental Design and Method Selection:
Observations were conducted with the SHARC-II instrument at the Caltech Submillimeter Observatory (CSO) using two scan modes (Lissajous and box-scan) to map star-forming regions. Data reduction used the CRUSH software package for iterative source signal extraction and noise correction.
2：Sample Selection and Data Sources:
Targets were selected from low-mass star-forming regions covered by Spitzer and Herschel surveys, focusing on cores with existing multiwavelength data. Data were obtained from 14 observing runs between 2003 and
3：List of Experimental Equipment and Materials:
20 SHARC-II bolometer array, CSO telescope, planets (Mars, Uranus, Neptune) for calibration, IDL Astronomy Library for data analysis.
4：Experimental Procedures and Operational Workflow:
Observations involved scanning modes with specific rates, calibration using planet scans, pointing and focus checks, data reduction with CRUSH, source extraction using Bolocat, and aperture photometry.
5：Data Analysis Methods:
Statistical analysis of calibration factors, Monte Carlo simulations for pointing uncertainty, comparison of scan modes, and calculation of flux densities and source properties.
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