Publications (92)
Magnification Bias of Distant Galaxies in the Hubble Frontier Fields: Testing Wave vs. Particle Dark Matter Predictions
Enoch Leung, Tom Broadhurst, Jeremy Lim +4
Acting as powerful gravitational lenses, the strong lensing galaxy clusters of the deep Hubble Frontier Fields (HFF) program permit access to lower-luminosity galaxies lying at hig…
Gravitational Lensing Predictions from Wave Simulations of Fuzzy Dark Matter
Jiajun Zhou, Zhengxiang Li, Amruth Alfred +3
In the cold dark matter paradigm, ultra-light particles are emerging as strong contenders to conventional massive particles. A unique prediction of dark matter comprising such ultr…
Tracing the asymmetry in the envelope around the carbon star CIT 6
Dinh-V-Trung, Jeremy Lim
We present high angular resolution observations of HCN J=5--4 line and 7 mm continumm emission from the extreme carbon star CIT 6. We find that the 7 mm continuum emission is u…
Star Formation, Nebulae, and Active Galactic Nuclei in CLASH Brightest Cluster Galaxies. I. Dependence on Core Entropy of Intracluster Medium
Arsen Levitskiy, Jeremy Lim, Youichi Ohyama +2
We set the stage for reassessing how star formation, emission-line nebulae, and active galactic nuclei (AGNs) in brightest cluster galaxies (BCGs) depend on the thermodynamics of t…
Sustained formation of progenitor globular clusters in a giant elliptical galaxy
Jeremy Lim, Emily Wong, Youichi Ohyama +2
Globular clusters (GCs) are thought to be ancient relics from the early formative phase of galaxies, although their physical origin remains uncertain. GCs are most numerous around…
The Taiwan ECDFS Near-Infrared Survey: Very Bright End of the Luminosity Function at z>7
Bau-Ching Hsieh, Wei-Hao Wang, Haojing Yan +5
The primary goal of the Taiwan ECDFS Near-Infrared Survey (TENIS) is to find well screened galaxy candidates at z>7 (z' dropout) in the Extended Chandra Deep Field-South (ECDFS). T…
Radially-Inflowing Molecular Gas in NGC 1275 Deposited by a X-ray Cooling Flow in the Perseus Cluster
Jeremy Lim, YiPing Ao, Dinh-V-Trung
We have imaged in CO(2-1) the molecular gas in NGC 1275 (Perseus A), the cD galaxy at the center of the Perseus Cluster, at a spatial resolution of 1 kpc over a central regio…
The Orthogonally Aligned Dark Halo of an Edge-on Lensing Galaxy in the Hubble Frontier Fields: A Challenge for Modified Gravity
Jose M. Diego, Tom Broadhurst, Narciso Benitez +2
We examine a well resolved 8 arcsec lensed image that is symmetrically bent in the middle by an edge-on lenticular galaxy, in the Hubble Frontier Field (HFF) data of MACSJ0416.1-20…
Extragalactic microlensing through Ultra Diffuse Galaxies
Sung Kei Li, Thomas Broadhurst, Jose M. Diego +3
Stellar microlensing is a powerful method to constrain compact dark matter models, uncover binary stars, and exoplanets during caustic crossing events. At cosmological distances, {…
Spiral Arms, Infall, and Misalignment of the Circumbinary Disk from the Circumstellar Disks in the Protostellar Binary System L1551 NE
Shigehisa Takakuwa, Kazuya Saigo, Tomoaki Matsumoto +5
We report the ALMA Cycle 2 observations of the Class I binary protostellar system L1551 NE in the 0.9-mm continuum, C18O (3-2), 13CO (3-2), SO (7_8-6_7), and the CS (7-6) emission.…
The shaping effect of collimated fast outflows in the Egg nebula
Dinh-V-Trung, Jeremy Lim
We present high angular resolution observations of the HCN J=5--4 line from the Egg nebula, which is the archetype of protoplanetary nebulae. We find that the HCN emi…
Prevalence of Tidal Interactions among Local Seyfert Galaxies: The Control Experiment
Ya-Wen Tang, Cheng-Yu Kuo, Jeremy Lim +1
We test whether there is a relation between the observed tidal interactions and Seyfert activity by imaging in HI twenty inactive galaxies at the same spatial resolution and detect…
Highly efficient terahertz generation using 3D Dirac semimetals
Lu Wang, Jeremy Lim, Liang Jie Wong
We show that 3D Dirac semimetals are promising candidates for highly efficient optical-to-terahertz conversion due to their extreme optical nonlinearities. In particular, we predic…
Recent Formation of a Spiral Disk Hosting Progenitor Globular Clusters at the center of the Perseus Brightest Cluster Galaxy: I. Spiral Disk
Michael C. H. Yeung, Youichi Ohyama, Jeremy Lim
We address the nature and origin of a spiral disk at the center of NGC 1275, the giant elliptical galaxy at the center of the Perseus cluster, that spans a radius of $5\,\rm…
Evidence of Neutrino Enhanced Clustering in a Complete Sample of Sloan Survey Clusters, Implying eV
Razieh Emami, Tom Broadhurst, Pablo Jimeno +7
The clustering amplitude of 7143 clusters from the Sloan Digital Sky Survey (SDSS) is found to increase with cluster mass, closely agreeing with the Gaussian random field hypothesi…
A Free-Form Prediction for the Reappearance of Supernova Refsdal in the Hubble Frontier Fields Cluster MACSJ1149.5+2223
Jose M. Diego, Tom Broadhurst, Cuncheng Chen +7
The massive cluster MACSJ1149.5+2223(z=0.544) displays five very large lensed images of a well resolved spiral galaxy at . It is within one of these images tha…
Formation of Dense Molecular Gas and Stars at the Circumnuclear Starburst Ring in the Barred Galaxy NGC 7552
Hsi-An Pan, Jeremy Lim, Satoki Matsushita +2
We present millimeter molecular-line complemented by optical observations, along with a reanalysis of archival centimeter HI and continuum data, to infer the global dynamics and de…
The Taiwan ECDFS Near-Infrared Survey: Ultra-deep J and Ks Imaging in the Extended Chandra Deep Field-South
Bau-Ching Hsieh, Wei-Hao Wang, Chih-Chiang Hsieh +4
We present ultra-deep J and Ks imaging observations covering a 30' * 30' area of the Extended Chandra Deep Field-South (ECDFS) carried out by our Taiwan ECDFS Near-Infrared Survey…
JWST's PEARLS: TN J1338-1942 -- I. Extreme jet triggered star-formation in a luminous radio galaxy
Kenneth J. Duncan, Rogier A. Windhorst, Anton M. Koekemoer +25
We present the first JWST observations of the luminous radio galaxy TN J1338-1942, obtained as part of the ``Prime Extragalactic Areas for Reionization and Lensing Science…
Approaching intrinsic threshold breakdown voltage and ultra-high gain in graphite/InSe Schottky photodetector
Zhiyi Zhang, Bin Cheng, Jeremy Lim +10
Realizing both ultra-low breakdown voltage and ultra-high gain has been one of the major challenges in the development of high-performance avalanche photodetector. Here, we report…
An analytic model for the sub-galactic matter power spectrum in fuzzy dark matter halos
Hiroki Kawai, Masamune Oguri, Alfred Amruth +2
Fuzzy dark matter (FDM), a scalar particle coupled to the gravitational field without self-interaction whose mass range is , is one of the prom…
Explaining JWST counts with galaxy formation models
Giorgio Manzoni, Tom Broadhurst, Jeremy Lim +18
A distinct power-law break is apparent m_AB approximately 21 in the deep Near-Infrared PEARLS-JWST galaxy counts. The break becomes more pronounced at longer wavelengths, with the…
Einstein rings modulated by wavelike dark matter from anomalies in gravitationally lensed images
Alfred Amruth, Tom Broadhurst, Jeremy Lim +10
Unveiling the true nature of Dark Matter (DM), which manifests itself only through gravity, is one of the principal quests in physics. Leading candidates for DM are weakly interact…
Wave Dark Matter and Ultra Diffuse Galaxies
Alvaro Pozo, Tom Broadhurst, Ivan De Martino +4
Dark matter as a Bose-Einstein condensate, such as the axionic scalar field particles of String Theory, can explain the coldness of dark matter on large scales. Pioneering simulati…
Atacama Compact Array Measurements of the Molecular Mass in the NGC 5044 Cooling Flow Group
Gerrit Schellenberger, Laurence P. David, Jan Vrtilek +13
The fate of cooling gas in the centers of galaxy clusters and groups is still not well understood, as is also the case for the complex processes of triggering star formation in cen…
Hubble Frontier Field Free-Form Mass Mapping of the Massive Multiple-Merging Cluster MACSJ0717.5+3745
Jose M. Diego, Tom Broadhurst, Adi Zitrin +4
We examine the latest data on the cluster MACSJ0717.5+3745 from the Hubble Frontier Fields campaign. The critically lensed area is the largest known of any lens and very irregular…
Angular Momentum Exchange by Gravitational Torques and Infall in the Circumbinary Disk of the Protostellar System L1551 NE
Shigehisa Takakuwa, Masao Saito, Kazuya Saigo +4
We report the ALMA observation of the Class I binary protostellar system L1551 NE in the 0.9-mm continuum, C18O (3-2), and 13CO (3-2) lines at a ~1.6 times higher resolution and a…
Webb's PEARLS: Bright 1.5--2.0 micron Dropouts in the Spitzer/IRAC Dark Field
Haojing Yan, Seth H. Cohen, Rogier A. Windhorst +35
Using the first epoch of four-band NIRCam observations obtained by the James Webb Space Telescope (JWST) Prime Extragalactic Areas for Reionization and Lensing Science Program in t…
SMA CO(J=6-5) and 435 micron interferometric imaging of the nuclear region of Arp 220
Satoki Matsushita, Daisuke Iono, Glen R. Petitpas +11
We have used the Submillimeter Array (SMA) to make the first interferometric observations (beam size ~1") of the 12CO J=6-5 line and 435 micron (690 GHz) continuum emission toward…
Molecular Gas in nearby Early-Type Powerful Classical Radio Galaxies
Stephane Leon, Jeremy Lim, Francoise Combes +1
We report a survey for molecular gas in nearby powerful radio galaxies. Eight of the eighteen radio galaxies observed were detected with molecular masses in the range 10^7--10^9 Ms…
Evidence for Infalling Gas of Low Angular Momentum towards the L1551 NE Keplerian Circumbinary Disk
Shigehisa Takakuwa, Masao Saito, Jeremy Lim +1
We report follow-up observations of the Class I binary protostellar system L1551 NE in the C18O (3--2) line with the SMA in its compact and subcompact configurations. Our previous…
A Keplerian Circumbinary Disk around the Protobinary System L1551 NE
Shigehisa Takakuwa, Masao Saito, Jeremy Lim +3
We present SubMillimeter-Array observations of a Keplerian disk around the Class I protobinary system L1551 NE in 335 GHz continuum emission and submillimeter line emission in 13CO…
Molecular Gas and Star formation in ARP 302
Yiping Ao, Dinh-V-Trung, Jeremy Lim +2
We present the Submillimeter Array observation of the CO J=2-1 transition towards the northern galaxy, ARP 302N, of the early merging system, ARP 302. Our high angular resolution o…
Flashlights: Transients among Gravitationally-Lensed Star Clusters in the Dragon Arc. I. Stellar Microlensing vs Stellar Outbursts
Sung Kei Li, Jose M. Diego, Patrick L. Kelly +8
We report the discovery of transients among star clusters in a distant galaxy that is gravitationally lensed by a foreground galaxy cluster, and explore whether these transients co…
High-Spectral Resolution Observations of the Optical Filamentary Nebula in NGC 1275
Benjamin Vigneron, Julie Hlavacek-Larrondo, Carter Lee Rhea +18
We present new high-spectral resolution observations (R = = 7000) of the filamentary nebula surrounding NGC 1275, the central galaxy of the Perseus cluster. These observa…
Molecular shells in IRC+10216: Evidence for non-isotropic and episodic mass loss enhancement
Dinh-V-Trung, Jeremy Lim
We report high angular-resolution VLA observations of cyanopolyyne molecules HCN and HCN from the carbon rich circumstellar envelope of IRC+10216. The observed low-lying ro…
Tidal Disruption of Super Star Clusters as the origin of Bluish Light at the inner region of the Perseus Cluster Central Galaxy
Arsen Levitskiy, Youichi Ohyama, Jeremy Lim
Relatively blue light extends beyond a spiral disk from a radius of ~5 kpc out to ~14 kpc from the center of NGC 1275. Analyses of its spectrum and broadband colors reveal a popula…
Circumbinary Disks of the Protostellar Binary Systems in the L1551 Region
Shigehisa Takakuwa, Kazuya Saigo, Tomoaki Matsumoto +6
We report ALMA Cycle 4 observations of the Class I binary protostellar system L1551 IRS 5 in the 0.9-mm continuum emission, C18O (J=3-2), OCS (J=28-27), and four other Band 7 lines…
Imaging dark matter at the smallest scales with lensed stars
J. M. Diego, Sung Kei Li, Alfred Amruth +19
Observations of caustic-crossing galaxies at redshift show a wealth of transient events. Most of them are believed to be microlensing events of highly magnified stars. Ea…
The Yuan-Tseh Lee Array for Microwave Background Anisotropy
Paul T. P. Ho, Pablo Altamirano, Chia-Hao Chang +52
The Yuan-Tseh Lee Array for Microwave Background Anisotropy (AMiBA) is the first interferometer dedicated to studying the cosmic microwave background (CMB) radiation at 3mm wavelen…
Multi-copy Axion Transfer Function and Observational Implications of Effective de Broglie Scales
Jiashuo Zhang, Tom Broadhurst, Jeremy Lim +2
Ultra-light axions are viable fuzzy/wave-like dark matter (DM) candidates generically predicted by the String Axiverse paradigm with multiple particle copies, whereas most of t…
Lensed stars in galaxy-galaxy strong lensing -- a JWST prediction for the Cosmic Horseshoe
Sung Kei Li, Luke Weisenbach, Thomas E. Collett +10
We explore for the first time the possibility of detecting lensed star transients in galaxy-galaxy strong lensing systems upon repeated, deep imaging using the {\it James-Webb Spac…
On the Evidence for Molecular Outflows in High-redshift Dusty Star-forming Galaxies
James Nianias, Jeremy Lim, Michael Yeung
Galactic-scale outflows of molecular gas from star-forming galaxies constitute the most direct evidence for regulation of star formation. In the early universe (), such ou…
A Likely Super Massive Black Hole Revealed by its Einstein Radius in Hubble Frontier Fields Images
Mandy C. Chen, Tom Broadhurst, Jeremy Lim +4
At cosmological distances, gravitational lensing can provide a direct measurement of supermassive black hole (SMBH) masses irrespective of their luminosities. Here, we directly est…
TANGO I: ISM in nearby radio galaxies. Molecular gas
Breezy Ocana Flaquer, Stephane Leon, Francoise Combes +1
Powerful radio-AGN are hosted by massive elliptical galaxies which are usually very poor in molecular gas. Nevertheless gas is needed in the very center to feed the nuclear activit…
Jet-disturbed molecular gas near the Seyfert 2 nucleus in M51
Satoki Matsushita, Sebastien Muller, Jeremy Lim
Previous molecular gas observations at arcsecond-scale resolution of the Seyfert 2 galaxy M51 suggest the presence of a dense circumnuclear rotating disk, which may be the reservoi…
A Rigorous Free-form Lens Model of Abell 2744 to Meet the Hubble Frontier Fields Challenge
Daniel Lam, Tom Broadhurst, Jose M. Diego +4
Hubble Frontier Fields (HFF) imaging of the most powerful lensing clusters provides access to the most magnified distant galaxies. The challenge is to construct lens models capable…
Delayed Feedback in High- Starbursts Revealed by Lyman- Profiles and Metal Line Diagnostics
James Nianias, Jeremy Lim, Yik Lok Wong +1
Lyman- emission, which owing to its resonant nature strongly couples the emergent line profile to gas kinematics, is a key observable for probing outflows from star-forming gal…
Interferometric 12CO(J=2-1) image of the Nuclear Region of Seyfert 1 Galaxy NGC 1097
Pei-Ying Hsieh, Satoki Matsushita, Jeremy Lim +2
We have mapped the central region of the Seyfert 1 galaxy NGC 1097 in 12CO(J=2-1) with the Submillieter Array (SMA). The 12CO(J=2-1) map shows a central concentration and a surroun…
Unscrambling the lensed galaxies in JWST images behind SMACS0723
Massimo Pascale, Brenda L. Frye, Jose Diego +16
The first deep field images from the James Webb Space Telescope (JWST) of the galaxy cluster SMACS~J0723.3-7327 reveal a wealth of new lensed images at uncharted infrared wavelengt…
JWST's PEARLS: Prime Extragalactic Areas for Reionization and Lensing Science: Project Overview and First Results
Rogier A. Windhorst, Seth H. Cohen, Rolf A. Jansen +82
We give an overview and describe the rationale, methods, and first results from NIRCam images of the JWST "Prime Extragalactic Areas for Reionization and Lensing Science" ("PEARLS"…
Subarcsecond Imaging of the High-Mass Star Forming Region Onsala 1
Yu-Nung Su, Sheng-Yuan Liu, Jeremy Lim
We report subarcsecond images of the high-mass star forming region Onsala 1 (ON 1) made with the Submillimeter Array (SMA) at 0.85 mm and the Very Large Array at 1.3 cm and 3.6 cm.…
The Subversive Role of Excessive External Shear in Concealing Lensing Anomalies
Amruth Alfred, Shashpal Singh, Rommulus Francis Lewis +5
To best reproduce observed multiply-lensed lensed images, lens models usually incorporate shear attributed to objects unrelated to the lensing galaxy (i.e., external shear): whethe…
Strongly correlated multi-electron bunches from interaction with quantum light
Suraj Kumar, Jeremy Lim, Nicholas Rivera +4
Strongly correlated electron systems are a cornerstone of modern physics, being responsible for groundbreaking phenomena from superconducting magnets to quantum computing. In most…
Radio Cores of Bipolar Nebulae: Search for Collimated Winds
Ting-Hui Lee, Jeremy Lim, Sun Kwok
We present results of our search for collimated ionized winds in bipolar nebulae using the Very Large Array (VLA) and the Australia Telescope Compact Array (ATCA). Our search is mo…
Flashlights: More than A Dozen High-Significance Microlensing Events of Extremely Magnified Stars in Galaxies at Redshifts z=0.7-1.5
Patrick L. Kelly, Wenlei Chen, Amruth Alfred +23
Once only accessible in nearby galaxies, we can now study individual stars across much of the observable universe aided by galaxy-cluster gravitational lenses. When a star, compact…
654 GHz Continuum and C18O (6-5) Observations of G240.31+0.07 with the Submillimeter Array
Huei-Ru Chen, Yu-Nung Su, Sheng-Yuan Liu +7
We report a dual-band observation at 223 and 654 GHz (460 micron) toward an ultracompact (UC) HII region, G240.31+0.07, with the Submillimeter Array. With a beam size of 1"5 X 0"8,…
Geometric Corroboration of the Earliest Lensed Galaxy at z~10.8 from Robust Free-Form Modelling
Brian M. Y. Chan, Tom Broadhurst, Jeremy Lim +4
A multiply-lensed galaxy, MACS0647-JD, with a probable photometric redshift of is claimed to constitute one of the very earliest known galaxies, formed…
A Geometrically Supported Candidate Multiply-Imaged by the Hubble Frontier Fields Cluster Abell 2744
Adi Zitrin, Wei Zheng, Tom Broadhurst +11
The deflection angles of lensed sources increase with their distance behind a given lens. We utilize this geometric effect to corroborate the photometric redshi…
Multiple Bipolar Molecular Outflows in the L1551 IRS5 Protostellar System
Po-Feng Wu, Shigehisa Takakuwa, Jeremy Lim
The multiple protostellar system L1551 IRS5 exhibits a large-scale bipolar molecular outflow. We have studied this outflow within ~4000 AU of its driving source(s) with the SubMill…
Transient star B/R ratio and star formation in lensed galaxies
Sung Kei Li, Jose M. Palencia, Jose M. Diego +8
The extreme magnification from galaxy clusters and microlenses therein allows the detection of individual, luminous stars in lensed galaxies as transient events, and hence provides…
Constraining the z 1 Initial Mass Function with {\it HST} and {\it JWST} Lensed Stars in MACS J0416.1-2403
Sung Kei Li, Jose M. Diego, Ashish K. Meena +19
Our understanding of galaxy properties and evolution is contingent on knowing the initial mass function (IMF), and yet to date, the IMF is constrained only to local galaxies. Indiv…
Propagation-induced limits to high harmonic generation in 3D Dirac semimetals
Jeremy Lim, Yee Sin Ang, Lay Kee Ang +1
3D Dirac semimetals (DSMs) are promising materials for terahertz high harmonic generation (HHG). We show that 3D DSMs' high nonlinearity opens up a regime of nonlinear optics where…
Using Fast-Switching Data to Characterize Atmospheric Phase Fluctuations at the Submillimeter Array
Dharam Vir Lal, Satoki Matsushita, Jeremy Lim
For the submillimeter band observations, we have been routinely adopting the calibration cycle time of 20-30 minutes, which is the same as any typical centimeter and millimeter ban…
A high-resolution view of the source-plane magnification near cluster caustics in wave dark matter models
Jose M. Diego, Alfred Amruth, Jose M. Palencia +10
We present the highest resolution images to date of caustics formed by wave dark matter (DM) fluctuations near the critical curves of cluster gravitational lenses. We describe…
A free-form lensing model of A370 revealing stellar mass dominated BCGs, in Hubble Frontier Fields images
Jose M. Diego, Kasper B. Schmidt, Tom Broadhurst +9
We derive a free-form mass distribution for the unrelaxed cluster A370 (z=0.375), using the latest Hubble Frontier Fields images and GLASS spectroscopy. Starting from a reliable se…
Submillimeter Array Observation of the Proto-Planetary Nebula CRL 618 in the CO J=6-5 Line
Jun-ichi Nakashima, David Fong, Tatsuhiko Hasegawa +6
We report on the results of a Submillimeter Array interferometric observation of the proto-planetary nebula CRL 618 in the 12CO J=6-5 line. With the new capability of SMA enabling…
BUFFALO/Flashlights: Constraints on the abundance of lensed supergiant stars in the Spock galaxy at redshift 1
Jose M. Diego, Sung Kei Li, Ashish K. Meena +27
We present a constraint on the abundance of supergiant (SG) stars at redshift z approx. 1, based on recent observations of a strongly lensed arc at this redshift. First we derive a…
Signatures of Fuzzy Dark Matter Inside Radial Critical Curves
J. M. Palencia, Paloma Morilla, Sung Kei Li +5
We investigate the strong gravitational lensing properties of fuzzy dark matter (FDM) halos, focusing on the magnification properties near radial critical curves (CCs). Using simul…
Geometric Support for Dark Matter by an Unaligned Einstein Ring in Abell 3827
Mandy C. Chen, Tom Broadhurst, Jeremy Lim +4
The non-detection of dark matter (DM) particles in increasingly stringent laboratory searches has encouraged alternative gravity theories where gravity is sourced only from visible…
Probing the mass loss history of the yellow hypergiant IRC+10420
Dinh-V-Trung, Sebastien Muller, Jeremy Lim +2
We have used the sub-millimeter array to image the molecular envelope around IRC+10420. Our observations reveal a large and clumpy expanding envelope around the star. The molecular…
Temporally and Spatially Extended Star Formation in the Brightest Cluster Galaxy of MACS\,J0329.70211 at : Implications for Stellar Growth
Juno Li, Leo W. H. Fung, Jeremy Lim +1
Brightest cluster galaxies (BCGs), particularly those at the centers of cool-core clusters, can exhibit star formation over spatial extents of up to 100\,kpc at inferred r…
Resolving the Bright HCN(1-0) Emission toward the Seyfert 2 Nucleus of M51: Shock Enhancement by Radio Jets and Weak Masing by Infrared Pumping?
Satoki Matsushita, Dinh-V-Trung, Frédéric Boone +3
We present high angular resolution observations of the HCN(1-0) emission (at ~1" or ~34 pc), together with CO J = 1-0, 2-1, and 3-2 observations, toward the Seyfert 2 nucleus of M5…
Possible Molecular Spiral Arms in the Protoplanetary Disk of AB Aur
Shin-Yi Lin, Nagayoshi Ohashi, Jeremy Lim +3
The circumstellar dust disk of the Herbig Ae star AB Aur has been found to exhibit complex spiral-like structures in the near-IR image obtained with the Subaru Telescope. We presen…
Molecular Gas in the X-ray Bright Group NGC 5044 as Revealed by ALMA
Laurence P. David, Jeremy Lim, William Forman +17
A short 30 minute ALMA observation of the early-type galaxy NGC 5044, which resides at the center of an X-ray bright group with a moderate cooling flow, has detected 24 molecular s…
A Lens Finder Map to check claimed High-z Galaxies behind SMACS J0723.3-7327
Alex Chow, Sung Kei Li, Tom Broadhurst +5
The first science image released by the JWST reveals numerous galaxies in the distant background of the galaxy cluster SMACS J0723.3-7327. Some have claimed redshifts of up to $z \…
Recent Formation of a Spiral Disk Hosting Progenitor Globular Clusters at the center of the Perseus Brightest Cluster Galaxy: II. Progenitor Globular Clusters
Jeremy Lim, Emily Wong, Youichi Ohyama +1
We address the nature and origin of Super Star Clusters (SSCs) discovered by Holtzman et al. (1992) within a radius of from the center of NGC 1275, the giant ell…
Rotationally-Driven Fragmentation for the Formation of the Binary Protostellar System L1551 IRS 5
Jeremy Lim, Paul K. H. Yeung, Tomoyuki Hanawa +3
Either bulk rotation or local turbulence is widely invoked to drive fragmentation in collapsing cores so as to produce multiple star systems. Even when the two mechanisms predict d…
Role of Electon Excitation and Nature of Molecular Gas in Cluster Central Elliptical Galaxies
Jeremy Lim, Dinh-V-Trung, Jan Vrtilek +2
We present observations in CO(3-2) that, combined with previous observations in CO(2-1), constrain the physical properties of the filamentary molecular gas in the central 6.5…
A Multiwavelength Study of a Young, Z-shaped, FR I Radio Galaxy NGC 3801
Ananda Hota, Jeremy Lim, Youichi Ohyama +3
We present preliminary results from a multi-wavelength study of a merger candidate, NGC3801, hosting a young FR I radio galaxy, with a Z-shaped structure. Analysing archival data f…
Dark Matter distinguished by skewed microlensing in the "Dragon Arc"
Tom Broadhurst, Sung Kei Li, Amruth Alfred +18
Microlensed stars recently discovered by JWST & HST follow closely the winding critical curve of A370 along all sections of the ``Dragon Arc" traversed by the critical curve. These…
Formation of the Unequal-Mass Binary Protostars in L1551 NE by Rotationally-Driven Fragmentation
Jeremy Lim, Tomoyuki Hanawa, Paul K. H. Yeung +3
We present observations at 7 mm that fully resolve the two circumstellar disks, and a reanalyses of archival observations at 3.5 cm that resolve along their major axes the two ioni…
First Confirmed Detection of a Bipolar Molecular Outflow from a Young Brown Dwarf
Ngoc Phan-Bao, Basmah Riaz, Chin-Fei Lee +6
Studying the earliest stages in the birth of stars is crucial for understanding how they form. Brown dwarfs with masses between that of stars and planets are not massive enough to…
Dense molecular clumps in the envelope of the yellow hypergiant IRC+10420
Dinh-V-Trung, Ka-Tat Wong, Jeremy Lim
The circumstellar envelope of the hypergiant star IRC+10420 has been traced as far out in SiO J=2-1 as in CO J = 1-0 and CO J = 2-1, in dramatic contrast with the centrally condens…
Tracing Outflows from Stellar Feedback in the Early Universe with Lyman-
James Nianias, Jeremy Lim, Yik Lok Wong +3
Blind spectroscopy of massive lensing galaxy clusters with MUSE has revealed large numbers of gravitationally-lensed Lyman- emitters exhibiting asymmetric profiles at $ 2.9 \l…
A Free-Form mass model of the Hubble Frontier Fields Cluster AS1063 (RXC J2248.7-4431) with over one hundred constraints
Jose M. Diego, Tom Broadhurst, Jess Wong +5
We derive a free-form mass distribution for the massive cluster AS1063 (z=0.348) using the completed optical imaging from the Hubble Frontier Fields programme. Based on a subset of…
Prevalence of Tidal Interactions among Local Seyfert Galaxies
Cheng-Yu Kuo, Jeremy Lim, Ya-Wen Tang +1
No mechanisms have hitherto been conclusively demonstrated to be responsible for initiating optically-luminous nuclear (Seyfert) activity in local disk galaxies. Only a small minor…
Resolving the collimation zone of an intermediate-mass protostar
Adriana R. RodrÃguez-Kamenetzky, Carlos Carrasco-González, Luis Felipe RodrÃguez Jorge +12
We report new VLA and e-MERLIN high resolution and sensitivity images of the Triple Radio continuum Source in the Serpens star forming region. These observations allowed us to perf…
JWST's PEARLS: A z=6 quasar in a train-wreck galaxy merger system
Madeline A. Marshall, Rogier A. Windhorst, Giovanni Ferrami +35
We present JWST NIRSpec integral field spectroscopy observations of the z=5.89 quasar NDWFS J1425+3254 from 0.6-5.3 microns, covering the rest-frame ultraviolet and optical at a sp…
Magnification bias reveals severe contamination in Hubble Frontier Field photo-z catalogs
Jiashuo Zhang, Jeremy Lim, Tom Broadhurst +4
Gravitational lensing by massive galaxy clusters enables faint distant galaxies to be more abundantly detected than in blank fields, thereby allowing one to construct galaxy lumino…
Multiple Radial Cool Molecular Filaments in NGC 1275
I-Ting Ho, Jeremy Lim, Dinh-V-Trung
We have extended our previous observation (Lim et al. 2008) of NGC1275 covering a central radius of ~10kpc to the entire main body of cool molecular gas spanning ~14kpc east and we…
Molecular Gas Reservoir in low-z Powerful Radio Galaxies
Jeremy Lim, Stephane Leon, Francoise Combes +1
We report a survey for molecular gas in 3C radio galaxies at redshifts z < 0.031. Four of the twenty-three galaxies observed were detected with molecular gas masses in the range 10…