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Jan Forbich8/20/25, 9:00 AMInvited talk
The Orion Nebula Cluster (ONC), the nearest region of high-mass star formation, hosts a rich population of low-mass young stellar objects (YSOs). While X-ray studies have long revealed high-energy activity in YSOs, only recent advances in radio instrumentation - particularly wideband VLA receivers and the VLBA software correlator - have enabled detailed, complementary insights into their...
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Silvia Leurini (INAF)8/20/25, 9:40 AMInvited talk
Methanol (CH₃OH) has emerged as one of the most versatile molecular tracers of the physical and chemical conditions in the interstellar medium, offering insights into gas temperature, density, kinematics, and evolutionary stage. This contribution pays tribute to the pivotal work of Prof. Dr. Karl M. Menten, whose pioneering studies on methanol in star-forming regions paved the way for much of...
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Alberto Sanna (INAF, Osservatorio Astronomico di Cagliari)8/20/25, 10:30 AMContributed talk
After Karl's discovery of the methanol maser transition at 6.7-GHz in the early '90, a number of young stars have gained much interest in the community being associated with the brightest masers of this kind. Among them, HW2 in Cepheus-A stands out as the closest source to the Sun and thus a preferred maser laboratory, but its story is yet to be told. The circum-stellar environment surrounding...
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Qizhou Zhang (Center for Astrophysics | Harvard & Smithsonian)8/20/25, 10:50 AMContributed talk
Massive protostars are typically born in parsec-scale molecular clumps that collapse and fragment, leading to the formation of a cluster of stellar objects. How massive molecular clumps collapse and fragment to give rise to a cluster of stellar objects has been a puzzle for decades. In this presentation, I report systematic survey in the NH3 (1, 1) and (2, 2) inversion lines toward 62...
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Andrea Giannetti (INAF - IRA Bologna)8/20/25, 11:10 AMContributed talk
Characterizing the initial stages of star cluster formation is crucial for understanding their evolution. The analysis of our systematic ALMA survey of nearby, high-mass quiescent clumps revealed a puzzle: many objects with at least hundreds of solar masses of molecular material detected in single dish dust continuum data disappeared at high resolution, indicating an extended, relatively...
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Katharina Immer (ESO)8/20/25, 1:00 PMContributed talk
The formation of high-mass stars remains one of the key open questions in astrophysics. While structures familiar from low-mass star formation—such as outflows, jets, and rotating centroids—have been observed in massive star-forming regions, detailed studies at spatial scales of a few hundred AU are still rare and limited to only a handful of sources.
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Recent ALMA observations of the high-mass... -
Michael Mattern (CEA Paris-Saclay)8/20/25, 1:20 PMContributed talk
Submillimeter continuum observations with high sensitivity of the Herschel satellite space mission have revolutionized our understanding of the link between the structure of the cold interstellar medium (ISM) and the star formation process. In particular, the Gould Belt Survey of nearby (d < 0.5 kpc) molecular star-forming clouds was able to resolve physical scales that are critical to reveal...
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Timea Csengeri (Laboratoire d'astrophysique de Bordeaux)8/20/25, 1:40 PMContributed talk
Most stars form in multiple systems and clusters, especially OB type stars are frequently found in a clustered environment. Yet, the early phase of star and cluster formation is still poorly understood, and little attention has been paid to the complex interplay between the physical processes and the chemical evolution of the gas. Large area surveys of the Galaxy, such as ATLASGAL, provide...
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Hans Zinnecker (Universidad Autonoma de Chile)8/20/25, 2:00 PMContributed talk
The observational consequences of the merger scenario for massive star formation are explored and contrasted with the gradual accumulation of mass by disk accretion. In high-density protostar clusters, envelopes and disks provide a viscous medium that can dissipate the kinetic energy of passing stars, greatly enhancing the probability of capture. Protostellar mergers may produce...
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Dario Colombo (Argelander-Institute for Astronomy, University of Bonn)8/20/25, 2:20 PMInvited talk
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Zongnan Li (National Astronomical Observatory of Japan)8/20/25, 3:00 PMContributed talk
The Andromeda galaxy (M31) is the closest massive spiral galaxy and thus serves as a unique testbed of the physical properties of the interstellar medium in an external galaxy. We present a study of molecular cloud properties in M31 using IRAM 30m CO(1-0) and James Clerk Maxwell Telescope (JCMT) CO(3-2) observations in selected regions. The CO(3-2) observations in the disk regions are obtained...
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Yaoting Yan (Max-Planck-Institut für Radioastronomie)Poster
Molecular maser lines are signposts of star formation, probing the excitation and kinematics of very compact regions in the close environment of young stellar objects and providing useful targets for trigonometric parallax measurements. With the Effelsberg 100-m telescope, we discovered widespread non-metastable NH3 maser emission toward 17 high-mass star-forming regions (HMSFRs) in the Milky...
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Dr Thomas StankePoster
Feedback from the massive star population of freshly formed massive young clusters could be expected to have a significant impact on the dense gas physical properties surrounding these clusters and skew the stellar mass function resulting from star formation in such an environment. Higher temperatures may led to a larger Jeans mass, while enhanced turbulence may favour fragmentation to smaller...
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Poster
In terms of spatial scales, this report presents a framework for hierarchical hub-filament structures, spanning from dense cores ($\approx$1000 AU) to clumps ($\approx$1 pc), molecular clouds ($\approx$10–100 pc), and extending to galaxy-cloud scales ($\approx$1000 pc). Within this hierarchy, a dense core serves as the hub within a clump, a clump functions as the hub within a molecular cloud,...
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Poster
We present the kinematics and physical properties of a newly detected massive protostar in the outer Galaxy long filament G183 at a resolution of 0.1-0.3 pc resolution. The results are based on EMIR/IRAM 30m multiple observations of multiple molecular lines at $\lambda$=1 and 2 mm. G183 is associated with a far-infrared continuum source and methanol and water masers but no radio continuum...
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Guang-Xing Li (Yunnan University)Poster
Physics has been transforming our view of nature for centuries. While combining our physical knowledge with computational approaches has allowed people to model the evolution of physical systems in great detail, understanding the emergence of patterns and structures is limited in comparison. Correlations between quantities is the most dependable approach to describe the relationship between...
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Poster
Spectrally resolved [CII] observations of HII region bubbles have confirmed the presence of fast-expanding (v > 10 km/s) [CII] shells driven by stellar winds (e.g., Luisi et al. 2021). Recently, as part of the SOFIA legacy survey FEEDBACK, we identified a [CII] ring driven by a B0.5e star, associated with an HII region.
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Unlike typical expanding bubbles, the Diamond Ring lacks the... -
Poster
Pre-supernova stellar feedback plays an essential role during the cycle of gas through the interstellar medium. It drives the transition from the dense gas phase to the diffuse gas phase. Recent studies of both our galaxy and external galaxies highlight the importance of pre-supernova feedback in star formation and the destruction of molecular clouds. In this context, I will present our recent...
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Poster
Very Long Baseline Interferometry (VLBI) provides an unparalleled tool for studying the tightest young stellar systems that are unresolved even by cutting-edge optical facilities such as Gaia. In this talk, I will present our work using multi-epoch VLBA observations to dynamically characterize compact binaries and multiple systems in nearby star-forming regions: Ophiuchus, Serpens, Taurus, and...
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