Digging into the Interior of Hot Cores with ALMA (DIHCA). VIII. Feeding a high-mass binary system in the making

@misc{olguin2026digging,
  title = {{Digging into the Interior of Hot Cores with ALMA (DIHCA). VIII. Feeding a high-mass binary system in the making}},
  author = {Fernando A. Olguin and Yoko Oya and Patricio Sanhueza and Kaho Morii and Shanghuo Li and Kotomi Taniguchi and Huei-Ru Vivien Chen and Yu Cheng and Qiuyi Luo and Qizhou Zhang and Takeshi Sakai Kongcheng Liu and Yutaka Nakazawa},
  howpublished = {arXiv},
  year = {2026},
  month = nov,
  doi = {10.48550/arxiv.2611.08641},
  eprint = {2611.08641},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2611.08641},
}

TY  - UNPB
TI  - Digging into the Interior of Hot Cores with ALMA (DIHCA). VIII. Feeding a high-mass binary system in the making
AU  - Fernando A. Olguin
AU  - Yoko Oya
AU  - Patricio Sanhueza
AU  - Kaho Morii
AU  - Shanghuo Li
AU  - Kotomi Taniguchi
AU  - Huei-Ru Vivien Chen
AU  - Yu Cheng
AU  - Qiuyi Luo
AU  - Qizhou Zhang
AU  - Takeshi Sakai Kongcheng Liu
AU  - Yutaka Nakazawa
PY  - 2026
DA  - 2026/11/05
PB  - arXiv
DO  - 10.48550/arxiv.2611.08641
UR  - https://arxiv.org/abs/2611.08641
AB  - We analyze the gas kinematics in the proto-binary NGC 6334I(N) ALMAe9-ALMAe14 system with the Atacama Large Millimeter/submillimeter Array (ALMA) at 1.33 mm with an angular resolution of 66 mas (~90 au). With a separation of 740 au between the system members, these observations allow a detailed study of the gas motion around this likely binary system hosting at least one growing high-mass star. Some CH_3OH lines tracing cold gas (E_u/k_B~100 K) reveal the presence of ordered circumbinary gas motion around the binary system within a ~1000 au radius, and rotation around the individual sources with rotation axes pointing roughly in the same direction. We estimate a central source mass, uncorrected for inclination, of 2 M_⊙ for the secondary, while the primary has an estimated mass of 5 M_⊙ as reported in previous works. The CH_3OH transitions with higher E_u/k_B (≳400 K) values reveal circumstellar gas rotation in ALMAe9 consistent with the cold gas tracers. The vibrationally excited SO emission also traces rotation around ALMAe9 and potentially an accretion shock from a flow feeding the circumstellar disk of ALMAe14. We identify two potential inflows feeding the circumstellar disks from the circumbinary gas at rates of ~10^−6−10^−4 M_⊙ yr^−1 from CH_3OH emission. An additional third inflow seems to be feeding the primary from gas at larger scales.
ER  -