Results 41 to 50 of about 3,871,291 (295)

The ALMA-QUARKS Survey: Hot Molecular Cores Are a Long-standing Phenomenon in the Evolution of Massive Protostars

The Astrophysical Journal
We present an analysis of the QUARKS survey sample, focusing on protoclusters where hot molecular cores (HMCs; traced by CH _3 CN (12–11)) and HC/UC H ii regions (traced by H30 α /H40 α ) coexist.
Dezhao Meng, Tie Liu, Jarken Esimbek, Sheng-Li Qin, Guido Garay, Paul F. Goldsmith, Jianjun Zhou, Xindi Tang, Wenyu Jiao, Yan-Kun Zhang, Fengwei Xu, Siju Zhang, Anandmayee Tej, Leonardo Bronfman, Aiyuan Yang, Sami Dib, Swagat R. Das, Jihye Hwang, Archana Soam, Yisheng Qiu, Dalei Li, Yuxin He, Gang Wu, Lokesh Dewangan, James O. Chibueze, Pablo García, Prasanta Gorai, Naval Kishor Bhadari, Yong Zhang, Patricio Sanhueza, Yongquan Luo, Jia-Hang Zou, Kee-Tae Kim, Dongting Yang, Lei Zhu, Xunchuan Liu, Macleod Gordon, Yingxiu Ma   +37 more
doaj   +1 more source

Anomalous Microwave Emission from Star Forming Regions

Advances in Astronomy, 2013
The evidence for microwave emission from spinning dust grains has been strengthened considerably by its detection in a number of discrete astrophysical objects associated with star formation.
Anna M. M. Scaife
doaj   +1 more source

Identifying Physical Structures in Our Galaxy with Gaussian Mixture Models: An Unsupervised Machine Learning Technique

The Astrophysical Journal, 2023
We explore the potential of the Gaussian mixture model (GMM), an unsupervised machine-learning method, to identify coherent physical structures in the interstellar medium.
M. Tiwari, R. Kievit, S. Kabanovic, L. Bonne, F. Falasca, C. Guevara, R. Higgins, M. Justen, R. Karim, Ü. Kavak, C. Pabst, M. W. Pound, N. Schneider, R. Simon, J. Stutzki, M. Wolfire, A. G. G. M. Tielens   +16 more
doaj   +1 more source

Residual tail twisting in ascidian larvae is stabilized by asymmetric myofibrils that resist bilateral symmetry restoration

FEBS Letters, EarlyView.
Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure, Misaki K. Nishio, Satoru Okuda, Kohji Hotta   +3 more
wiley   +1 more source

The ALMA-ATOMS Survey: Methanol Emission in a Large Sample of Hot Molecular Cores

The Astrophysical Journal
Methanol (CH _3 OH) is a key complex organic molecule (COM) in the interstellar medium, widely used as a tracer of dense gas and hot molecular cores (HMCs).
Jiahang Zou, Tie Liu, Sheng-Li Qin, Yaping Peng, Fengwei Xu, Xunchuan Liu, Li Chen, Xindi Tang, Sami Dib, Zi-Yang Li, Hong-Li Liu, Mika Juvela, Patricio Sanhueza, Pablo Garcia, Chang Won Lee, Guido Garay, Swagat R. Das, Yan-Kun Zhang, Kee-Tae Kim, Jeong-Eun Lee, Meizhu Liu, Leonardo Bronfman, Zhiping Kou, Dongting Yang, Gang Wu, Jihye Hwang, Dezhao Meng, Mengyao Tang, James O. Chibueze   +28 more
doaj   +1 more source

Degradation mechanism of the von Willebrand factor A2 domain by nattokinase

FEBS Letters, EarlyView.
Nattokinase, a natto‐derived protease, exhibits potent antithrombotic effects. This study demonstrates that nattokinase directly cleaves the von Willebrand factor (vWF) A2 domain in vitro. Unlike the native regulator ADAMTS13, nattokinase degrades folded vWF independently of shear stress.
Ryuichi Hyakumoto, Masatomo So, Ayako Furukawa, Kenji Sugase   +3 more
wiley   +1 more source

Circumnuclear Star-forming Regions in barred Galaxies

, 1999
We present high-resolution Hα velocity fields and rotation curves of the circum nuclear star-forming regions of five barred galaxies. Two of the five objects show substantially smaller initial rises than the three others; these two objects also have ...
Knapen, J., Laine, S., Relano, M.
core   +2 more sources

From mice to humans—divergent strategies for intestinal homeostasis and regeneration

FEBS Letters, EarlyView.
Recent advances such as organoid genome editing, xenotransplantation, imaging, and whole‐genome sequencing have enabled direct studies of human intestinal stem cells (ISCs). These studies reveal species‐specific features, including slower ISC proliferation, distinct injury responses, slower somatic mutation accumulation in humans, and an inverse ...
Keiko Ishikawa, Shinya Sugimoto, Toshiro Sato   +2 more
wiley   +1 more source

Signatures of Mass Segregation from Competitive Accretion and Monolithic Collapse

The Astrophysical Journal
The two main competing theories proposed to explain the formation of massive (>10 M _⊙ ) stars—competitive accretion and monolithic core collapse—make different observable predictions for the environment of the massive stars during, and immediately after,
Richard J. Parker, Emily J. Pinson, Hayley L. Alcock, James E. Dale   +3 more
doaj   +1 more source

Masers in star forming regions [PDF]

Proceedings of the International Astronomical Union, 2012
AbstractMaser emission plays an important role as a tool in star formation studies. It is widely used for deriving kinematics, as well as the physical conditions of different structures, hidden in the dense environment very close to the young stars, for example associated with the onset of jets and outflows.
Bartkiewicz, Anna, van Langevelde, Huib Jan   +1 more
openaire   +2 more sources