Conveners
Star formation: (including high-energy astrophysics)
- Shih-Ping Lai
Circumstellar interaction of supernova (SN) ejecta is an essential process in the evolution and observations of SNe have found the signature of circumstellar interaction both in the early and late evolutionary phase of SNe. Here we show that if the SN forward shock plunges into tenuous stellar wind from dense circumstellar medium (CSM) residing in the vicinity of the progenitor, the subsequent...
In this paper, we present a comprehensive catalog of magnetar bursts detected with NICER, aimed at characterizing their temporal and spectral properties. This study includes all available NICER observations of known magnetars and two magnetar-like rotation-powered pulsars, covering 7.5 years of data. Using the Bayesian blocks method, we systematically search for rapid flux variations in the...
X-ray polarization is a powerful tool for studying particle acceleration in high-energy astrophysical phenomena such as supernova remnants (SNRs) and pulsar wind nebulae (PWNe). Measurements of X-ray polarization provide valuable insights into the geometry and physical processes within these objects, revealing details about their magnetic field structures, particle acceleration mechanisms, and...
Complex organic molecules (COMs) in solar-like young stellar objects (YSOs) are of great interest due to their potential link to the origin of life. Under the ALMA Survey of Orion PGCCs (ALMASOP) project, we have identified 11 out of 56 protostellar cores that are rich in warm COMs. Our modeling suggests that the observed COMs are primarily located in the warm, innermost regions of the...
Orion KL is a chemically rich high-mass star-forming region, characterized by strong molecular line emission and complex thermal structures. Using ALMA Band 1 data, we present rotational temperature (Trot) and column density (Ntot) maps of CH3OH and NH3, two key tracers of dense gas and warm chemistry. CH3OH, often considered a cornerstone...
Prestellar cores represent the initial conditions of star formation. The Orion B prestellar core G205.46 M3 has been reported to exhibit two substructures, B1 and B2, which have been proposed as the stellar embryos of a future protobinary system. At this stage, heavy molecules such as CO are significantly depleted in these cold, dense environments, limiting our ability to probe core centers....
