6 citations · 11 across the 14 of their papers we have counts for
14 papers
The Neutral Hydrogen Gas Content of Star-forming and Quiescent S0 Galaxies
D. A. A. Lee, Karen L. Masters, David V. Stark +1
Lenticular (or S0) galaxies that remain actively star-forming (SFS0s) are a unique transition population among galaxies. We investigated the HI (21cm) neutral hydrogen content of a…
Compton-thick AGN Characterisation in a Multi-wavelength Context: Insights from the 70-Month \textit{SWIFT}/BAT Catalogue
Muhammad Luqman Hakeem Musa, Zamri Zainal Abidin, Masatoshi Imanishi +2
We analyse Compton-thick active galactic nuclei (CT AGNs), a heavily obscured subclass that challenges traditional X-ray diagnostics. Using 243 sources from the 70-Month \textit{SW…
Prediction of Major Solar Flares Using Interpretable Class-dependent Reward Framework with Active Region Magnetograms and Domain Knowledge
Zixian Wu, Xuebao Li, Yanfang Zheng +14
In this work, we develop, for the first time, a supervised classification framework with class-dependent rewards (CDR) to predict MM flares within 24 hr. We construct multipl…
Investigating Ionospheric TEC Variations in Solar and Geomagnetic Influences Across Solar Activity Phases
Ziyadat Hassan, Zamri Zainal Abidin, Affan Adly Nazri +1
This study examines the variability of ionospheric total electron content (VTEC) in response to solar and geomagnetic drivers across solar cycles 23 to 25. While the dominant effec…
Operational Solar Flare Forecasting System Using an Explainable Large Language Model
Xuebao Li, Yongshang Lv, Jinfang Wei +14
This study focuses on forecasting major (>=M-class) solar flares that can severely impact the near-Earth environment. We construct two types of datasets using the Space Weather HMI…
Investigating the Jet Width Profile of CTA 102 with Very Long Baseline Interferometry at Parsec Scales
ZhanHao Ng, Juan Carlos Algaba, Zamri Zainal Abidin
Active Galactic Nucleus jets have long be thought to exhibit a conical jet shape, but recently, several jets were found to have a transition from parabolic to conical structure. As…
Rethinking Habitability using Biogenic Precursors: Formaldehyde in Millimeter Molecular Clouds of the Inner Galaxy
Nursyazela Badrina Baharin, Affan Adly Nazri, Zulfazli Rosli +5
We present a comprehensive study of formaldehyde (H2CO) absorption and radio recombination line (H110a) emission in 215 molecular clouds from the Bolocam Galactic Plane Survey (BGP…
Variability of the Faraday Rotation Measure in the Parsec-scale Jet of AGN 1633+382
Kah Chun Lai, Juan Carlos Algaba Marcos, Zamri bin Zainal Abidin
We study the Faraday rotation measure (RM) variability of flat spectrum radio quasar 1633+382 on 5 epochs spanning from 2004 to 2008. We used 4 to 43~GHz VLBI polarization data fro…
Temporal variability in low-frequency radio interference: Insight from high-cadence monitoring at a candidate radio notification zone in Malaysia
Affan Adly Nazri, Zamri Zainal Abidin, Mohamad Ridhauddin Mat Sabri +9
Extensive radio frequency interference (RFI) monitoring is essential in the site selection process before constructing radio astronomy observatories, followed by mitigation strateg…
The Limits of Water Maser Kinematics: Insights from High-Mass Protostar AFGL 5142-MM1
Zulfazli Rosli, Ross A. Burns, Affan Adly Nazri +14
Multi-epoch VLBI observations measure 3D water maser motions in protostellar outflows, enabling analysis of inclination and velocity. However, these analyses assume that water mase…
A comprehensive analysis using 9 dark matter halo models on the spiral galaxy NGC 4321
Tan Wei Shen, Zamri Zainal Abidin, Norsiah Hashim
This paper addressed the dark matter analysis on the spiral galaxy NGC 4321 (M100) by considering the nine different dark matter profiles so far lacking in the scientific literatur…
Dark Matter in the Central Region of the Spiral Galaxy NGC 4321
Israa Abdulqasim Mohammed Ali, Chorng-Yuan Hwang, Zamri Zainal Abidin
We present our results of 12 CO(1-0) transition in the central region of NGC 4321 using the Atacama Large Millimeter and Sub-millimeter Array (ALMA). We found an unaccounted mass o…
Supernova Neutrino Background Bound on the SFR History
Jafar Khodagholizadeh, Sepehr Arbabi Bidgoli, Zamri Zainal Abidin
The purpose of the present study is to compare the predictions of different models of star formation rate (SFR) history in the universe with the upper limit of Super Kamiokande for…
Rotation Curve with MOND and Dark Matter Halo profile for ESO138-G014
Norsiah Hashim, Mariafelicia De Laurentis, Zamri Zainal Abidin +1
This paper is devoted to solve the galactic rotation problem for ESO138-G014 galaxy based on two theories: dark matter and Modified Newtonian Dynamics. Here we did the rotation cur…