Studying young stellar populations in G345.5+1.5 molecular cloud
Abstract
Using different sky surveys, we studied IRAS sources and embedded clusters located in the G345.5+1.5 region. Our analysis comprises multi-wavelength (optical to radio) data, exploited using various methods: photometry, near-infrared spectroscopy for ten stars in the embedded cluster DBS-114, and astrometry. We estimated the main parameters of the embedded stellar populations in the G345.5+1.5 molecular cloud, such as their extent, reddening, age, and mass. We also found a consistent distance value using different approaches. For each studied population, we classified several point objects as early main sequence stars, stars with infrared excess, and class I/II YSOs. For the particular case of DBS 114, our spectral classification revealed four B-type stars, and we used astrometric information from GAIA EDR3. The combination of optical and infrared information revealed an abnormal reddening law in some embedded clusters. Our analysis favored a scenario with a Lyman continuum emission excess at some of the studied stellar populations.
- Publication:
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New Astronomy
- Pub Date:
- May 2022
- DOI:
- 10.1016/j.newast.2021.101739
- Bibcode:
- 2022NewA...9301739B
- Keywords:
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- Stars: early-type;
- Stars: pre-main sequence;
- ISM: HII regions