| タイトル | VLBI survey of Rho Ophiuchi - A population of magnetized, diskless young stellar objects |
| 著者（英） | Phillips, Robert B.; Lestrade, Jean-Francois; Andre, Philippe; Deeney, Bryan D. |
| 著者所属（英） | Jet Propulsion Lab., California Inst. of Tech. |
| 発行日 | 1992-12-20 |
| 言語 | eng |
| 内容記述 | Results are reported of VLBI observations of nine Rho Oph YSOs, which yield positive detections in five cases, with flux densities ranging from 1.2 to 9 mJy at 3.6 cm. In contrast, while simultaneously detected by the VLA at levels of a few mJy, the protostellar outflow source IRAS 16293 and the 'protostar' candidate YLW 15 were overresolved and undetected on the Goldstone-VLA baseline. The radio emission from the young A star VSSG 14 was measured to be circularly polarized, at a level comparable to what had previously been observed for the embedded magnetic B star S1. The brightness temperatures measured for the VLBI-detected TSOs range from about 10 exp 7 to greater than about 8 x 10 exp 7 J, unambiguously establishing that these radio sources are nonthermal, and not the result of circumstellar ionized winds as is probably the case for IRAS 16293 and YLW 15. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 93A21495 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/321086 |
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