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April 15, 2026Monthly Notices of the Royal Astronomical SocietyOpen Access

An inverted infall profile for the collapse of the massive star-forming IRDC SDC335.579-0.292

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Authors

XJXie JinjinGFG.A. FullerUniversity of CologneDLDi LiChinese Academy of Sciences

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Overview

This analysis reveals an inverted infall profile in a massive star-forming region, suggesting complex collapse dynamics.

Key Points

  • To examine the infall properties and collapse dynamics of the massive infrared dark cloud SDC335.579-0.292.
  • Utilized spatially-resolved HCO+ J=1–0 and H13CO+ J=1–0 maps for analysis.
  • Compared observations with the Hill5 model and radiative transfer models.
  • Examined spatial variation in molecular line emission.
  • Best-fit infall velocity measured at −0.6 to −1.6 km s−1.
  • Mass infall rate calculated between a few × 10−3 and 10−2 M⊙yr−1.
  • Identified a minimum infall velocity at 0.7 pc, with variations at different radii.

Cite This Study

Jinjin et al. (2026) studied this question.

synapsesocial.com/papers/69df2abce4eeef8a2a6afbd0https://doi.org/10.1093/mnras/stag644
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