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KINEMATICS AND STRUCTURE OF THE MASSIVE STAR-FORMING REGION G350.29+0.12
Автор(ы)
Aidana Abdirakhman
Aruzhan Omar
Zhomartkali Islyam
N.Sh. Alimgazinova
Aizat Demessinova
A. S. Nodyarov
Duriya Tuiakbayeva
Kamila Adilzhan
Nurzhan Shaimoldin
Дата публикации
29 марта 2026 г.
Тип
journal article
Том
23
Выпуск
1
Первая страница
334
Последняя страница
345
ISSN
1998-6688
Аннотация
We present high–angular resolution 1.3 mm continuum and molecular line observations toward the highmass star-forming region G350.29+0.12, using CH₃CN and CH₃¹³CN rotational transitions. The continuum emission resolves two main cores: a bright, compact northern core G350.29+0.12 A and a weaker southern core G350.29+0.12 B. Core A exhibits six compact substructures embedded within more extended emission. M K-components of the CH3CN J = 14→13 and CH3 13CN J = 14→13 transitions are detected, with the emission arising primarily from core A. The CH3CN moment 0 maps show that the integrated intensities peak at the main continuum position, indicating that the molecular emission traces warm and dense gas. The moment 1 maps reveal a pronounced velocity gradient of ∼2 km s-1 across core A, oriented from northwest to southeast, while the moment 2 maps show K-dependent variations in velocity dispersion. Position–velocity diagrams further indicate organized rotational motions, exhibiting a compact velocity structure with a central peak and systematic gradients. Rotational temperature analysis yields = 360.6 ± 34.8 K for CH3CN, tracing the hottest and densest gas and Trot = 138 ± 45 K for CH3 13CN, consistent with cooler and more extended material. Together, these results demonstrate that G350.29+0.12 A is a rotating hot molecular core undergoing active high-mass star formation.
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Название
W7143366155.pdf
Описание
Полный текст в открытом доступе, лицензия cc-by; источник: https://vestnik.kbtu.edu.kz/jour/article/download/2527/726
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755,86 KB
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Adobe PDF
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(MD5):6e3acff5eb08ddaa64f37b72b630de22