Radio continuum emission and water masers towards CB 54 - Astrophysics > Astrophysics of GalaxiesReport as inadecuate




Radio continuum emission and water masers towards CB 54 - Astrophysics > Astrophysics of Galaxies - Download this document for free, or read online. Document in PDF available to download.

Abstract: We present high angular resolution observations of water masers at 1.3 cm andradio continuum emission at 1.3, 3.6 and 6 cm towards the Bok globule CB 54using the Very Large Array. At 1.3 cm, with subarsecond angular resolution, wedetect a radio continuum compact source located to the south-west of theglobule and spatially coincident with a mid-infrared embedded object MIR-b.The spectral index derived between 6 and 1.3 cm alpha=0.3+-0.4 is flat,consistent with optically thin free-free emission from ionized gas. We proposethe shock-ionization scenario as a viable mechanism to produce the radiocontinuum emission observed at cm frequencies. Water masers are detected at twodifferent positions separated by 2.3-, and coincide spatially with twomid-infrared sources: MIR-b and MIR-c. The association of these mid-IR sourceswith water masers confirms that they are likely protostars undergoingmass-loss, and they are the best candidate as driving sources of the molecularoutflows in the region.



Author: I. de Gregorio-Monsalvo, J. F. Gomez, G. Anglada, J. M. Torrelles, T. B. H. Kuiper, O. Suarez, N. A. Patel

Source: https://arxiv.org/







Related documents