Early prediction of dementia using fMRI data with a graph convolutional network approach

Shuning Han ... [et al.].

Serie: Trabajos publicados del IAR ; no. 1786

Resumen: We present archive Atacama Large Millimeter/Submillimeter Array (ALMA) Band 6 observations of the 13 CO (J=2–1) and 12 CO (J=2–1) molecular line emission of the protostellar system associated with HH 30. The 13 CO molecular line shows the accretion disk while the molecular outflow is traced by the emission of the 12 CO molecular line. We estimated a dynamical mass for the central object of 0.45 ± 0.14 M ⊙, and a mass for the molecular outflow of 1.83 ± 0.19 × 10 −4 M ⊙ . The molecular outflow presents an internal cavity as well as multiple outflowing shell structures. We distinguish three different shells with constant expansion (∼ 4−6 km s −1 ) and possible rotation signatures (≤ 0.5 km s −1 ). We find that the shells can be explained by magnetocentrifugal disk winds with launching radii R launch ≲ 4 au and a small magnetic lever arm λ ∼ 1.6−1.9. The multiple shell structure may be the result of episodic ejections of the material from the accretion disk associated with three different epochs with dynamical ages of 497 ± 15 yr, 310 ± 9 yr, and 262 ± 11 yr for the first, second, and third shells, respectively. The outermost shell was ejected 187 ± 17 yr before the medium shell, while the medium shell was launched 48 ± 14 yr before the innermost shell. Our estimations of the linear and angular momentum rates of the outflow as well as the accretion luminosity are consistent with the expected values if the outflow of HH 30 is produced by a wide-angle disk wind.