A census of young stellar objects in two line-of-sight star-forming regions toward IRAS 22147+5948 in the outer Galaxy
نویسندگان
چکیده
Context. Star formation in the outer Galaxy, namely, outside of Solar circle, has not been extensively studied part due to low CO brightness molecular clouds linked with negative metallicity gradient. Recent infrared surveys provide an overview dust emission large sections but they suffer from cloud confusion and poor spatial resolution at far-infrared wavelengths. Aims. We aim develop a methodology identify classify young stellar objects (YSOs) star-forming regions Galaxy use it resolve long-standing disparity terms distance evolutionary status IRAS 22147+5948. Methods. used support vector machine learning algorithm complement standard color–color color–magnitude diagrams our search for YSOs 22147 region, based on publicly available data Spitzer Mapping Outer survey. The agglomerative hierarchical clustering was clusters. Then physical properties individual were calculated. distances determined using 1–0 Five College Radio Astronomy Observatory Results . identified 13 Class I II YSO candidates color-color diagrams, along additional 2 21 sources, respectively, applied techniques. spectral energy distributions 23 sources modeled star passive disk, corresponding objects. models three include envelopes that are typical grouped into two clusters located ~2.2 kpc 5 ~5.6 kpc. extent CO, radio continuum, confirms origin distinct similar line sight. Conclusions may serve as unique laboratory exploring across environments, condition complementary methods ancillary properly account uncertainties.
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ژورنال
عنوان ژورنال: Astronomy and Astrophysics
سال: 2022
ISSN: ['0004-6361', '1432-0746']
DOI: https://doi.org/10.1051/0004-6361/202141676