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The evolutionary state of young stellar objects in IRDC G48

Wiel, M. van der (2007) The evolutionary state of young stellar objects in IRDC G48. Master's Thesis / Essay, Astronomy.

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Spitzer Space Telescope mid-infrared (3–24 m) photometry is processed and analyzed in order to assess the young stellar content of Infrared Dark Cloud G48. It is established from color-color diagram analysis that 40 objects are YSO (Young Stellar Object) candidates, spread out over all phases of YSO evolution. One third of these sources are classified in the early envelope accretion phase. SED (Spectral Energy Distribution) model fitting identifies seven of the twenty 24 m cores as YSOs, again in varying stages of evolution. SED model fitting places the masses of the central stellar objects of the cores in the range 2.5–14 M. The sub-millimeter core ‘P1’ (Ormel et al. 2005) is broken up into two cores by Spitzer observations; SED model fitting to these two cores is consistent with the total central luminosity of 102–103 L found by previous modeling.

Item Type: Thesis (Master's Thesis / Essay)
Degree programme: Astronomy
Thesis type: Master's Thesis / Essay
Language: English
Date Deposited: 15 Feb 2018 07:28
Last Modified: 15 Feb 2018 07:28

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