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B-fields In STar-forming Region Observations (BISTRO): Dual-Wavelength Constraints on Size-Dependent Grain Alignment in Star-Forming Regions
Ray S. Furuya, David Berry, Pierre Bastien +65
We compared 450 and 850 m POL-2 observations from the James Clerk Maxwell Telescope at resolution. The median absolute difference in polarization angle between bands is…
B-fields In STar-forming Region Observations (BISTRO): Technical Foundations for Quantitative 450/850 m JCMT SCUBA-2/POL-2 Polarimetry
Ray S. Furuya, David Berry, Pierre Bastien +59
We present five technical validations of SCUBA-2/POL-2 polarimetry on the James Clerk Maxwell Telescope at 450 and 850 m, using 174 archival fields in 69 molecular cloud regions…
Multiscale Synthetic observations of Polarized dust emission: On the origin of Depolarization effect from Molecular clouds to Starless cores and Constraints on Dust Physics
Nguyen Chau Giang, Thiem Hoang, Blakesley Burkhart +4
Submillimeter observations of polarized dust emission from molecular clouds to starless cores frequently report a decrease in polarization fraction (p) with increasing dust emissio…
Probing Anomalous Microwave Emission with the Square Kilometre Array
Matías Vidal, Simón Casassus, Roke Cepeda-Arroita +15
Anomalous microwave emission (AME) represents an excess of radiation in the 10-60 GHz range, distinct from synchrotron, free-free, or thermal dust emission. Although most commonly…
The magnetic field in the Milky Way Galaxy: from large to small scales
Xiaohui Sun, Jennifer West, Marijke Haverkorn +6
The Milky Way is the galaxy in which we can study its magnetic field to the finest details, providing an ideal laboratory to understand the fundamental questions: how magnetic fiel…
BISTRO Survey: Gravity-Dominated and Magnetically Regulated Star Formation in M17 SW
Mengke Zhao, Keping Qiu, Ji-hyun Kang +27
We present high-resolution magnetic field maps of the M17 SW molecular cloud using JCMT 850 m dust polarization at a scale of 14. The magnetic field exhibits a distinct arc-…
One-dimensional and time-dependent modelling of complex organic molecules in protostars
Le Ngoc Tram, Serena Viti, Katarzyna M. Dutkowska +5
Complex organic molecules (COMs), the building blocks of life, have been extensively detected under various physical conditions, from quiescent clouds to star-forming regions. They…
Galactic Dust Polarization in Turbulent Multiphase ISM: On the Origin of the Asymmetry
Yue Hu, Bao Truong, Thiem Hoang +1
Polarized thermal emission from Galactic dust is the dominant foreground for CMB polarization measurements at high frequencies, with its statistical properties shaped by the interp…
3D B-fieLds in the InterStellar medium and Star-forming regions (3D-BLISS): I. Using Starlight Polarization in the Massive IRDC Filament G11.11-0.12
Bao Truong, Thiem Hoang, Nguyen Bich Ngoc +3
Measuring three-dimensional magnetic fields (3D B-fields) is essential to understand the formation and evolution of the interstellar medium and multi-scale star formation; however,…
The JCMT BISTRO-3 Survey: Variation of magnetic field orientations on parsec and sub-parsec scales in the massive star-forming region G28.34+0.06
Jihye Hwang, Kate Pattle, Chang Won Lee +35
Magnetic fields play a significant role in star-forming processes on core to clump scales. We investigate magnetic field orientations and strengths in the massive star-forming clum…
Supermassive black hole mass measurement in the spiral galaxy NGC 4736 Using JWST/NIRSpec stellar kinematics
Dieu D. Nguyen, Hai N. Ngo, Tinh Q. T. Le +12
We present accurate mass measurements of the central supermassive black hole (SMBH) in NGC 4736 (M 94).\ We used the ``gold-standard" stellar absorption features (CO band heads) at…
The JCMT BISTRO Survey: Unveiling the Magnetic Fields around Galactic Center
Meng-Zhe Yang, Shih-Ping Lai, Janik Karoly +40
We acquired 450 μm and 850 μm dust continuum polarization observations toward the inner region of the Central Molecular Zone (CMZ) as part of the B-Fields In Star-Forming Region Ob…
Synthetic Modelling of Polarized Dust Emission in Intermediate-Mass YSOs: II: Effects of Radiative Torque Disruption on Dust Grains in Protostellar Jets/Outflows
Nguyen Chau Giang, V. J. M. Le Gouellec, Thiem Hoang +2
One of the potential explanations for the existence of very large grains (VLGs) in the inner envelope of low/intermediate-mass Class 0/I Young Stellar Object is the migration of VL…
B-fields And dust in interstelLar fiLAments using Dust POLarization (BALLAD-POL): III. Grain alignment and disruption mechanisms in G34.43+0.24 using polarization observations from JCMT/POL-2
Saikhom Pravash, Archana Soam, Pham Ngoc Diep +3
Polarization of starlight and thermal dust emission due to aligned non-spherical grains helps us to trace magnetic field (B-field) morphology in molecular clouds and to study grain…
Grain alignment and dust evolution physics with polarisation (GRADE-POL). I. Dust polarisation modelling for isolated starless cores
Le Ngoc Tram, Thiem Hoang, Alex Lazarian +6
The polarisation of light induced by aligned interstellar dust serves as a significant tool in investigating cosmic magnetic fields, dust properties, and poses a challenge in chara…
A Tale of Three: Magnetic Fields along the Orion Integral-Shaped Filament as Revealed by JCMT BISTRO survey
Jintai Wu, Keping Qiu, Frederick Poidevin +152
As part of the BISTRO survey, we present JCMT 850 m polarimetric observations towards the Orion Integral-Shaped Filament (ISF) that covers three portions known as OMC-1, OMC-2,…
The JCMT BISTRO Survey: The Magnetic Fields of the IC 348 Star-forming Region
Youngwoo Choi, Woojin Kwon, Kate Pattle +150
We present 850 m polarization observations of the IC 348 star-forming region in the Perseus molecular cloud as part of the B-fields In STar-forming Region Observation (BISTRO) s…
Probing 3D magnetic fields using starlight polarization and grain alignment theory
Bao Truong, Thiem Hoang
Polarization of starlight induced by dust grains aligned with the magnetic field (hereafter B-field) is widely used to measure the two-dimensional B-fields projected onto the plane…
Synthetic Modelling of Polarized Dust Emission in Intermediate-Mass YSOs: I: Constraining the Role of Iron Inclusions and Inelastic Relaxation on Grain Alignment with ALMA Polarization
Nguyen Chau Giang, V. J. M. Le Gouellec, Thiem Hoang +2
Iron inclusions embedded inside dust grains play a crucial role in both internal alignment (IA) via Barnett relaxation and external alignment via the MAgnetically Enhanced RAdiativ…
Foreground Dust Properties towards the Cluster NGC 7380
Sadhana Singh, Jeewan C. Pandey, Thiem Hoang +4
Using starlight polarization, we present the properties of foreground dust towards cluster NGC 7380 embedded in H{\sc ii} region Sh 2-142. Observations of starlight polarization ar…
Understanding the Multi-wavelength Thermal Dust Polarisation from the Orion Molecular Cloud in Light of the Radiative Torque Paradigm
Le Ngoc Tram, Thiem Hoang, Helmut Wiesemeyer +4
Dust grains are important in various astrophysical processes and serve as indicators of interstellar medium structures, density, and mass. Understanding their physical properties a…
B-fields And dust in interstelLar fiLAments using Dust POLarization (BALLAD-POL): II. Testing the Radiative Torque Paradigm in Musca and OMC-1
Nguyen Bich Ngoc, Thiem Hoang, Pham Ngoc Diep +1
Polarization of starlight and thermal dust emission caused by aligned dust grains is a valuable tool to characterize magnetic fields (B-fields) and constrain dust properties. Howev…
Detection of extragalactic anomalous microwave emission in NGC 2903 using KVN single-dish observations
Panomporn Poojon, Aeree Chung, Thiem Hoang +4
We present the results of the single-dish observations using the Korean VLBI Network to search for anomalous microwave emission (AME) in nearby galaxies. The targets were selected…
Magnetic Field at the Galactic Centre from Multi-Wavelength Dust Polarization
M. S. Akshaya, Thiem Hoang
We have mapped the magnetic field (-field) for a region of about 30 pc around the centre of our Galaxy, which encompasses the circumnuclear disk (CND), the minispiral, and the 2…