Sub-arcsecond high sensitivity measurements of the DG~Tau jet with e-MERLIN
| Autor: | Ainsworth, Rachael E., Ray, Tom P., Scaife, Anna M. M., Greaves, Jane S., Beswick, Rob J. |
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| Rok vydání: | 2013 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1093/mnrasl/slt114 |
| Popis: | We present very high spatial resolution deep radio continuum observations at 5 GHz (6 cm) made with e-MERLIN of the young stars DG Tau A and B. Assuming it is launched very close (~=1 au) from the star, our results suggest that the DG Tau A outflow initially starts as a poorly focused wind and undergoes significant collimation further along the jet (~=50 au). We derive jet parameters for DG Tau A and find an initial jet opening angle of 86 degrees within 2 au of the source, a mass-loss rate of 1.5x10^-8 solar masses/yr for the ionised component of the jet, and the total ejection/accretion ratio to range from 0.06-0.3. These results are in line with predictions from MHD jet-launching theories. Comment: Accepted MNRAS Letters |
| Databáze: | arXiv |
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