-
En-Tzu Lin (National Tsing Hua University)Poster
The coincident observation of GW170817 and GRB170817A has provided unprecedented insight into the physical connection between binary neutron star mergers and short gamma-ray bursts.
Go to contribution page
In this work, we perform a multi-messenger study with the aim of constraining the jet geometry of sGRBs, assuming that all BNS mergers produce relativistic jets. Our analysis incorporates gravitational-wave data... -
Chen-Kang Pan (國立台東大學)Poster
The Antennae Galaxies (NGC 4038/4039) are among the nearest and most well-known interacting galaxy systems, making them an ideal laboratory for studying star formation and X-ray source populations in merging environments. In this work, we aim to combine Chandra,HST, and JWST observations to investigate the relationship between X-ray sources, optically visible star clusters, and dust-obscured...
Go to contribution page -
Wing Ying Eaudrie Wan (National Chengchi University)Poster
To reveal the nature of Type Ia supernovae (SNe Ia), one approach is to identify the surviving companions of their progenitor systems near the explosion centers of the SN remnants (SNRs). In DEM L71, a star was previously reported as a potential surviving companion of the SN Ia because of its peculiar radial velocity, offset by more than 2.5$\sigma$ from the mean of the underlying stellar...
Go to contribution page -
Mr Chun Hei Chan (Department of Physics, National Cheng Kung University)Poster
Transitional millisecond pulsars (tMSPs) are a rare class of neutron star binaries that switch between accretion-powered and rotation-powered states, providing a unique laboratory to study the interaction between accretion flows and pulsar winds. Multiwavelength observations, particularly in the optical and X-ray bands, have revealed complex variability patterns in these systems, including...
Go to contribution page -
Tzu-Hsuan Lin (National Tsing Hua University)Poster
Pulsars are rapidly rotating, highly magnetized neutron stars that emit periodic pulses of radiation across a broad range of wavelengths, from radio to gamma rays. Despite decades of study, the mechanisms responsible for their radiation remain unclear. In this work, we investigate the correlations between the radio emission of X-ray–emitting pulsars and their X-ray properties. We find that the...
Go to contribution page -
CHUN CHUN LIN (National Changhua University of Education)Poster
This study investigates the quasi-periodic oscillation (QPO) observed in the X-ray emission of the active galactic nucleus (AGN) RE J1034+396. Since QPOs are rare in AGNs and are thought to be closely related to the structure of the accretion disk and its surrounding physical environment, this source provides an important opportunity to explore their physical origin. The main goal of this work...
Go to contribution page -
Dr Ekaterina Koptelova (Graduate Institute of Astronomy, NCU)Poster
We report the discovery of a candidate binary black hole system at redshift z~7.46, identified through high resolution spectroscopy of the Mg II λ2796,2803 doublet. The spectrum reveals a composite Mg II emission profile with two resolved doublets at closely spaced redshifts, z=7.454 and z=7.463. The intrinsically stronger Mg II λ2796 line shows suppression toward a near 1:1 flux ratio,...
Go to contribution page -
HAO-MIN Chang (NCU astronomy)Poster
Type Ia supernovae (SNe Ia) are commonly categorized into two sub-groups: normal-velocity (NV) and high-velocity (HV) SNe, which are distinguished by whether the ejecta velocity of Si II λ6355 exceeds 12,000 km s-1 or not. However, the velocity distributions of these two groups overlap, making it difficult to classify them cleanly using ejecta velocity alone. Therefore, in order to identify...
Go to contribution page -
Hong-Wen Liu (National Tsing Hua University)Poster
We investigate the transformation of cool-core (CC) clusters into non-cool-core (NCC) systems during cluster mergers, incorporating both active galactic nucleus (AGN) feedback and radiative cooling. Using three-dimensional hydrodynamic simulations implemented with the GAMER (v2) code, we explore how mergers affect the entropy evolution of CC clusters. By varying key parameters such as mass...
Go to contribution page -
余 承諳 (國立彰化師範大學物理學系光電組四年級)Poster
In this study, we present a comprehensive catalog of short bursts from magnetars based on thirteen years of NuSTAR observations. We compiled all short bursts from observed magnetars to analyze their durations, spectral properties, and the relationships between these characteristics across different sources. In the duration distribution, we clearly observed that bursts from SGR J1935+2154 are...
Go to contribution page -
Chung-Ming KoPoster
Cosmic rays interact with magnetized plasma via scattering with the magnetic fluctuations or waves embedded in the plasma. As they stream through the plasma they excite Alfven waves. This forms a self-consistent system. The structure and evolution of the system can be studied by treating the system as a multi-fluid system. We are interested in the three-fluid system which comprises thermal...
Go to contribution page -
Yizhi HongPoster
The accreting millisecond X-ray pulsar (AMXP) IGR J17062–6143 was discovered in 2006 by INTEGRAL, with subsequent RXTE observations detecting a pulsation frequency of 163.65 Hz. To further characterize its long-term timing behavior, NICER conducted an extensive monitoring campaign comprising several observations between 2017 and 2022. This study focuses specifically on the analysis of...
Go to contribution page -
Dr Che-Jui Chang (National Taiwan University)Poster
A jet bursting from a high-mass microquasar (HMMQ) behaves just as its scaled-down counterpart bursting from an active galactic nucleus. The jet–wind interaction is conjectured to affect the γ-ray emission. A jet in a HMMQ evolves much faster than its counterpart in an AGN, making the former valuable in studying accretion, eruption, and emission processes around a black hole. In this work, the...
Go to contribution page -
Khoa Ngo Thanh Ho (National Central University)Poster
We present photometric and spectroscopic observations of the Type Ic superluminous supernova SN2025imr at redshift z ≈ 0.09, distinguished by a pronounced post-peak stair-like decline in its light curve, in which the luminosity decreases in discrete steps rather than following a smooth decay, with the brightest epoch is detected at an absolute magnitude of approximately −22 mag. The dataset...
Go to contribution page -
Chuan-Jui Li (NCCU)Poster
The nature of supernova (SN) explosions can be unveiled by the geometry of their remnants. We develop a systematic machine-learning–based framework to analyze the geometric structures of supernova remnants (SNRs). By applying Gaussian Mixture Model (GMM) fitting to the observed brightness distributions, we decompose both the shock fronts and interior materials into multiple Gaussian...
Go to contribution page -
Dipak Debnath (National Tsing Hua University)Poster
GS 1354-64 is a transient black hole X-ray binary that has been studied during its past outbursts, which primarily exhibited hard-state behavior. In this work, we present a detailed broadband spectral analysis of its 2025-2026 outburst using data from Insight-HXMT and NuSTAR, providing wide energy coverage from soft to hard X-rays.
The spectra are modeled using diskbb+powerlaw,...
Go to contribution page -
SUBHAM SRIMANI (National Tsing Hua University)Poster
The Galactic transient X-ray binary GRS J1739–278 was simultaneously monitored by the IXPE, NuSTAR, Swift and Insight-HXMT satellites during its recent 'failed' outburst in 2025. We have performed a broadband spectral evolution study of the source using Swift XRT, IXPE and NuSTAR data in the 1–50 keV band with different sets of phenomenological and physical models. The spectral fitting shows...
Go to contribution page -
Afif Ismail (National Taiwan Normal University)Poster
The observation of the M87* black hole shadow has opened new avenues for exploring horizon-scale phenomena around astrophysical black holes. Current black hole image modeling often relies on one-fluid general relativistic magnetohydrodynamic (GRMHD) simulations to model the black hole system, with subsequent post-processing with radiative transfer based on the simulated environments. However,...
Go to contribution page -
Peng-Yin Wang (National Central University)Poster
Super-Chandrasekhar (03fg-like) Type Ia supernovae remain among least understood subclasses of thermonuclear explosions, their high luminosity have been attributed to various scenarios, including rotating massive WDs and interaction with circum-stellar medium (CSM). While 03fg-like SNe exhibit similar photometric evolution as those normal SNe Ia, they show a significantly more rapid decline...
Go to contribution page
Choose timezone
Your profile timezone: