ALMA Reveals an Explosive Outflow Candidate in IRAS 16119--5048

@misc{luo2026alma,
  title = {{ALMA Reveals an Explosive Outflow Candidate in IRAS 16119--5048}},
  author = {Yongquan Luo and Jianjun Zhou and Tie Liu and Jarken Esimbek and Siju Zhang and Xindi Tang and Sami Dib and Prasanta Gorai and Mika Juvela and Leonardo Bronfman and Patricio Sanhueza and Jihye Hwang and Fengwei Xu and Kee-Tae Kim and Guido Garay and Chang Won Lee and Tapas Baug and L. Viktor Tóth and Gang Wu and Dalei Li and Yuxin He and Yingxiu Ma and Dongdong Zhou and Toktarkhan Komesh and Weiguang Ji and Dezhao Meng and Jiasheng Li},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.07469},
  eprint = {2609.07469},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.07469},
  note = {CC BY-NC-ND 4.0},
}

TY  - UNPB
TI  - ALMA Reveals an Explosive Outflow Candidate in IRAS 16119--5048
AU  - Yongquan Luo
AU  - Jianjun Zhou
AU  - Tie Liu
AU  - Jarken Esimbek
AU  - Siju Zhang
AU  - Xindi Tang
AU  - Sami Dib
AU  - Prasanta Gorai
AU  - Mika Juvela
AU  - Leonardo Bronfman
AU  - Patricio Sanhueza
AU  - Jihye Hwang
AU  - Fengwei Xu
AU  - Kee-Tae Kim
AU  - Guido Garay
AU  - Chang Won Lee
AU  - Tapas Baug
AU  - L. Viktor Tóth
AU  - Gang Wu
AU  - Dalei Li
AU  - Yuxin He
AU  - Yingxiu Ma
AU  - Dongdong Zhou
AU  - Toktarkhan Komesh
AU  - Weiguang Ji
AU  - Dezhao Meng
AU  - Jiasheng Li
PY  - 2026
DA  - 2026/09/07
PB  - arXiv
DO  - 10.48550/arxiv.2609.07469
UR  - https://arxiv.org/abs/2609.07469
AB  - We present a multiwavelength study of the massive star formation region IRAS 16119-5048 (I16119) using ALMA ATOMS Band 3 and QUARKS Band 6 observations, complemented by archival ATCA radio continuum and Spitzer mid-infrared data. The CO (2-1) emission reveals a system of high-velocity streamer-like structures around the central region. Using dendrogram analysis of velocity-channel maps followed by linking in position-position-velocity space, we identify 16 approximately radially distributed streamers whose projected trajectories converge toward a common central region. The kinetic energy of the outflows is at least an order of magnitude lower than those of most known explosive outflows, while their mass entrainment and momentum rates are high compared with typical protostellar outflows, suggesting that I16119 may represent a low-energy explosive outflow candidate. Dense-gas and photodissociation-region tracers reveal shell-like structures associated with the 8 μm emission, indicating that feedback from the H II region may influence the streamer morphology. The 1.3 mm continuum resolves 27 dense cores along a fragmented filamentary structure. Their separations are consistent with thermal Jeans or cylindrical fragmentation, while the collect-and-collapse scenario is unsupported. The dense cores also show evidence of mass segregation, with the most massive cores concentrated near the inferred explosive centre. We suggest that I16119 is a plausible low-energy explosive outflow candidate, possibly triggered by dynamical interactions among centrally concentrated massive cores. However, the complex velocity structure and possible contamination from individual core-driven outflows prevent a definitive classification. More sensitive, higher angular-resolution observations are required to confirm the nature of the outflow.
ER  -