论文标题
B335原恒星的旋转插入模型
Models of Rotating Infall for the B335 Protostar
论文作者
论文摘要
Protostellar源的模型B335是使用轴对称三维模型开发的，以解决一维模型中发现的冲突。这些模型受到大量观察的限制，包括Alma，Herschel和Spitzer数据。对使用ALMA的ProtoStellar源B335的观察显示了针对HCO $^+$和HCN $ J = 4 \ rightArrow 3 $ transitions中心连续体的红移吸收。将数据与距离的新估计结合在一起，以提供对三维辐射转移模型的强大限制，包括旋转，插入式信封，流出腔和非常小的磁盘。自$ 3 \ times 10^4 $和$ 4 \ times 10^4 $ yr的崩溃开始以来，这些模型偏爱年龄，这是连续和线条，从而解决了一维模型中发现的冲突。低估了Alma看到的连续发射的模型，这表明了诸如伪盘等其他组件。近年来，最合适的模型用于将4.5 $μm$通量中的变化转换为一个模型，在过去8年中，光度为5-7倍的变化。
Models of the protostellar source, B335, are developed using axisymmetric three-dimensional models to resolve conflicts found in one-dimensional models. The models are constrained by a large number of observations, including ALMA, Herschel, and Spitzer data. Observations of the protostellar source B335 with ALMA show red-shifted absorption against a central continuum source indicative of infall in the HCO$^+$ and HCN $J = 4\rightarrow 3$ transitions. The data are combined with a new estimate of the distance to provide strong constraints to three-dimensional radiative transfer models including a rotating, infalling envelope, outflow cavities, and a very small disk. The models favor ages since the initiation of collapse between $3 \times 10^4$ and $4 \times 10^4$ yr for both the continuum and the lines, resolving a conflict found in one-dimensional models. The models under-predict the continuum emission seen by ALMA, suggesting an additional component such as a pseudo-disk. The best-fitting model is used to convert variations in the 4.5 $μm$ flux in recent years into a model for a variation of a factor of 5-7 in luminosity over the last 8 years.
