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Revista mexicana de astronomía y astrofísica

versão impressa ISSN 0185-1101


DZIB, S. A. et al. Deep VLA observations of nearby star forming regions I: Barnard 59 and Lupus 1. Rev. mex. astron. astrofis [online]. 2016, vol.52, n.2, pp.317-327. ISSN 0185-1101.

Barnard 59 and Lupus 1 are two nearby star-forming regions visible from the southern hemisphere. In this manuscript, we present deep σ≲15μJy radio observations (v = 6 GHz) of these regions, and report the detection of a total of 114 sources. Thirteen of these sources are associated with known young stellar objects, nine in Barnard 59 and four in Lupus 1. The properties of the radio emission (spectral index and, in some cases, polarization) suggest a thermal origin for most young stellar objects. Only for two sources (Sz 65 and Sz 67) are there indications for a possible non-thermal origin. The remaining radio detections do not have counterparts at other wavelengths, and the number of sources detected per unit solid angle is in agreement with extragalactic number counts, suggesting that they are extragalactic sources.

Palavras-chave : radio continuum: stars; radiation mechanisms: non-thermal; radiation mechanisms: thermal; techniques: interferometric.

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