359 citations · 4.5k across the 87 of their papers we have counts for
88 papers
Population statistics of nanohertz gravitational wave sources
Jiming Yu, Zhen Pan, Xiao Xue +1
The recent detection of a nanohertz gravitational wave (GW) background by pulsar timing arrays (PTA) has sparked extensive discussions regarding its origin-whether it arises from a…
Partially Ionized Gas at Equilibrium Powered by Ultraviolet Irradiation
Liang Dai
We study the formation of a partially ionized zone behind the usual H II zone in photo-ionized gas for gas density intermediate between ordinary H II regions and AGN BLRs and witho…
Non-Gaussian Statistics of Nanohertz Stochastic Gravitational Waves
Xiao Xue, Zhen Pan, Liang Dai
Recent detection of nHz stochastic gravitational wave background (SGWB) by multiple pulsar timing arrays (PTAs) has stimulated intensive discussions about its physical origin. In p…
Effects of Subhalos on Interpreting Highly Magnified Sources Near Lensing Caustics
Lingyuan Ji, Liang Dai
Large magnification factors near gravitational lensing caustics of galaxy cluster lenses allow the study of individual stars or compact stellar associations at cosmological distanc…
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…
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…
A Young Super Star Cluster Powering a Nebula of Retained Massive Star Ejecta
Massimo Pascale, Liang Dai
We suggest that "Godzilla" of the lensed Sunburst galaxy () is a young super star cluster powering a nebula of gravitationally trapped stellar ejecta. Employing HST photome…
Identification of 40 gravitationally magnified stars in a galaxy at redshift of 0.725
Yoshinobu Fudamoto, Fengwu Sun, Jose M. Diego +44
Strong gravitational magnifications enable to detect faint background sources, resolve their internal structures, and even identify individual stars in distant galaxies. Highly mag…
Detecting Dark Matter Substructures on Small Scales with Fast Radio Bursts
Huangyu Xiao, Liang Dai, Matthew McQuinn
We propose measuring the arrival time difference of Fast Radio Bursts (FRBs) along two adjacent sightlines as a new probe to dark matter substructures on scales down to A…
Under Einstein's Microscope: Measuring Properties of Individual Rotating Massive Stars From Extragalactic Micro Caustic Crossings
Xu Han, Liang Dai
Highly magnified stars residing in caustic crossing lensed galaxies at z ~ 0.7-1.5 in galaxy cluster lensing fields inevitably exhibit recurrent brightening events as they traverse…
Dissecting the Stochastic Gravitational Wave Background with Astrometry
Mesut Çalışkan, Yifan Chen, Liang Dai +3
Astrometry, the precise measurement of star motions, offers an alternative avenue to investigate low-frequency gravitational waves through the spatial deflection of photons, comple…
The JWST Discovery of the Triply-imaged Type Ia "Supernova H0pe" and Observations of the Galaxy Cluster PLCK G165.7+67.0
Brenda L. Frye, Massimo Pascale, Justin Pierel +39
A Type Ia supernova (SN) at was discovered in James Webb Space Telescope Near Infrared Camera imaging of the galaxy cluster PLCK G165.7+67.0 (G165; ). The SN is…
JWST's PEARLS: Mothra, a new kaiju star at z=2.091 extremely magnified by MACS0416, and implications for dark matter models
J. M. Diego, Bangzheng Sun, Haojing Yan +28
We report the discovery of Mothra, an extremely magnified monster star, likely a binary system of two supergiant stars, in one of the strongly lensed galaxies behind the galaxy clu…
Spectroscopy of the Supernova H0pe Host Galaxy at Redshift 1.78
M. Polletta, M. Nonino, B. Frye +42
Supernova (SN) H0pe was discovered as a new transient in James Webb Space Telescope (JWST) NIRCam images of the galaxy cluster PLCK G165.7+67.0 taken as part of the "Prime Extragal…
Testing charge quantization with axion string-induced cosmic birefringence
Weichen Winston Yin, Liang Dai, Simone Ferraro
We demonstrate that the Peccei-Quinn-electromagnetic anomaly coefficient can be directly measured from axion string-induced cosmic birefringence by applying scattering…
Magnetic Fields from Compensated Isocurvature Perturbations
Jordan Flitter, Cyril Creque-Sarbinowski, Marc Kamionkowski +1
Compensated isocurvature perturbations (CIPs) are perturbations to the primordial baryon density that are accompanied by dark-matter-density perturbations so that the total matter…
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…
Wave Mechanics, Interference, and Decoherence in Strong Gravitational Lensing
Calvin Leung, Dylan Jow, Prasenjit Saha +3
Wave-mechanical effects in gravitational lensing have long been predicted, and with the discovery of populations of compact transients such as gravitational wave events and fast ra…
Detecting Strong Gravitational Lensing of Gravitational Waves with TianQin
Xin-yi Lin, Jian-dong Zhang, Liang Dai +2
When gravitational waves (GWs) pass by a massive object on its way to Earth, a strong gravitational lensing effect will happen. Thus, the GW signal will be amplified, deflected, an…
Paper 1: The JWST PEARLS View of the El Gordo Galaxy Cluster and of the Structure It Magnifies
Brenda L. Frye, Massimo Pascale, Nicholas Foo +41
The massive galaxy cluster El Gordo (z=0.87) imprints multitudes of gravitationally lensed arcs onto James Webb Space Telescope (JWST) Near-Infrared Camera (NIRCam) images. Eight b…
Nitrogen-enriched, highly-pressurized nebular clouds surrounding a super star cluster at cosmic noon
Massimo Pascale, Liang Dai, Christopher F. McKee +1
Strong lensing offers a precious opportunity for studying the formation and early evolution of super star clusters that are rare in our cosmic backyard. The Sunburst Arc, a lensed…
Gravitational wave lensing as a probe of halo properties and dark matter
Giovanni Tambalo, Miguel Zumalacárregui, Liang Dai +1
Just like light, gravitational waves (GWs) are deflected and magnified by gravitational fields as they propagate through the Universe. However, their low frequency, phase coherence…
JWST's PEARLS: a new lens model for ACT-CL J01024915, "EL Gordo'', and the first red supergiant star at cosmological distances discovered by JWST
Jose M. Diego, Ashish K. Meena, Nathan J. Adams +27
The first JWST data on the massive colliding cluster El Gordo confirm 23 known families of multiply lensed images and identify 8 new members of these families. Based on these famil…
Lensing of gravitational waves: efficient wave-optics methods and validation with symmetric lenses
Giovanni Tambalo, Miguel Zumalacárregui, Liang Dai +1
Gravitational wave (GW) astronomy offers the potential to probe the wave-optics regime of gravitational lensing. Wave optics (WO) effects are relevant at low frequencies, when the…