115 citations · 552 across the 82 of their papers we have counts for
19 papers · 1 filter
The cosmic history of Primordial Black Hole accretion and its uncertainties
Pratibha Jangra, Daniele Gaggero, Bradley J. Kavanagh +1
Primordial Black Holes (PBHs) have not been experimentally detected so far, but their existence would provide important insights about the early Universe and serve as one of the po…
Extending the cosmic distance ladder two orders of magnitude with strongly lensed Cepheids, carbon AGB, and RGB stars
J. M. Diego, S. P. Willner, J. M. Palencia +1
Gravitational lensing by galaxy clusters can create extreme magnification near the cluster caustics, thereby enabling detection of individual luminous stars in high-redshift backgr…
We Must Preserve Hubble given its Unique Complementarity to Webb, Roman, and Euclid
Rogier A. Windhorst, Gibson B. Bowling, Kevin S. Croker +17
We present compelling arguments -- focusing on galaxy science -- for preserving the main imagers and operational modes of the Hubble Space Telescope (HST) for as long as is technic…
LensWatch. II. Improved Photometry and Time-delay Constraints on the Strongly Lensed Type Ia Supernova 2022qmx ("SN Zwicky") with HST Template Observations
Conor Larison, Justin D. R. Pierel, Max J. B. Newman +34
Strongly lensed supernovae (SNe) are a rare class of transient that can offer tight cosmological constraints that are complementary to methods from other astronomical events. We pr…
Mass & Light in Galaxy Clusters: The case of Abell 370
M. Limousin, A. Niemiec, B. Beauchesne +16
Parametric strong lensing studies of galaxy clusters often display "misleading features". This is the case in the galaxy cluster Abell 370. Using strong lensing techniques, it has…
BUFFALO Wild Wings: A High Precision Free-Form Lens Model of MACSJ0416 with Constraints on Dark Matter from Substructure and Highly Magnified Arcs
Derek Perera, Liliya L. R. Williams, Jori Liesenborgs +10
We present new free-form and hybrid mass reconstructions of the galaxy cluster lens MACS J0416.12403 at using the lens inversion method GRALE. The reconstructions use…
Explanations for the two-component spectral energy distributions of gravitationally lensed stars at high redshifts
Armin Nabizadeh, Erik Zackrisson, Emma Lundqvist +4
Observations of gravitationally lensed, high-mass stars at redshifts occasionally reveal spectral energy distributions that contain two components with different effecti…
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 t…
JWST view of four infant galaxies at z=8.31-8.49 in the MACS0416 field and implications for reionization
Zhiyuan Ma, Bangzheng Sun, Cheng Cheng +34
New JWST/NIRCam wide-field slitless spectroscopy provides redshifts for four z>8 galaxies located behind the lensing cluster MACS J0416.1-2403. Two of them, "Y1" and "JD", have pre…
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…
JWST NIRSpec High-resolution Spectroscopy of MACS0647-JD at z=10.167: Resolved [OII] Doublet and Electron Density in an Early Galaxy
Abdurro'uf, Rebecca L. Larson, Dan Coe +26
We present JWST/NIRSpec high-resolution spectroscopy G395H/F290LP of MACS0647-JD, a gravitationally lensed galaxy merger at . The new spectroscopy, which is acquired for…
Unveiling the Cosmic Gems Arc at with JWST NIRCam
Larry D. Bradley, Angela Adamo, Eros Vanzella +22
We present recent JWST NIRCam imaging observations of SPT0615-JD (also known as the Cosmic Gems Arc), lensed by the galaxy cluster SPT-CL J0615-5746. The 5 arcsec long arc is the m…
PEARLS: Discovery of Point-Source Features Within Galaxies in the North Ecliptic Pole Time Domain Field
Rafael Ortiz, Rogier A. Windhorst, Seth H. Cohen +36
The first public 0.9-4.4μm NIRCam images of the North Ecliptic Pole (NEP) Time Domain Field (TDF) uncovered galaxies displaying point-source features in their cores as seen in the…
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…
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…
Lensed Type Ia Supernova "Encore" at z=2: The First Instance of Two Multiply-Imaged Supernovae in the Same Host Galaxy
J. D. R. Pierel, A. B. Newman, S. Dhawan +60
A bright (=24 mag), supernova (SN) candidate was discovered in JWST/NIRCam imaging acquired on 2023 November 17. The SN is quintuply-imaged as a result o…
SN H0pe: The First Measurement of from a Multiply-Imaged Type Ia Supernova, Discovered by JWST
Massimo Pascale, Brenda L. Frye, Justin D. R. Pierel +21
The first James Webb Space Telescope ({\it JWST}) Near InfraRed Camera (NIRCam) imaging in the field of the galaxy cluster PLCK G165.7+67.0 () uncovered a Type Ia supernova…
Bound star clusters observed in a lensed galaxy 460 Myr after the Big Bang
Angela Adamo, Larry D. Bradley, Eros Vanzella +25
The Cosmic Gems arc is among the brightest and highly magnified galaxies observed at redshift . However, it is an intrinsically UV faint galaxy, in the range of those no…