Massimo Pascale
A5008341021- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Gamma-ray bursts and supernovae
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Astrophysical Phenomena and Observations
- Astrophysics and Cosmic Phenomena
- Adaptive optics and wavefront sensing
- CCD and CMOS Imaging Sensors
- Astronomical Observations and Instrumentation
- Pulsars and Gravitational Waves Research
- Advanced Optical Sensing Technologies
- Radio Astronomy Observations and Technology
- Fish Ecology and Management Studies
- Digital Rights Management and Security
- Semiconductor Lasers and Optical Devices
- Marine and fisheries research
- Fish Biology and Ecology Studies
- Semantic Web and Ontologies
- Software Testing and Debugging Techniques
University of California, Berkeley
2020-2024
University of Hong Kong
2023
University of Arizona
2018-2019
We give an overview and describe the rationale, methods, first results from NIRCam images of JWST "Prime Extragalactic Areas for Reionization Lensing Science" ("PEARLS") project. PEARLS uses up to eight filters survey several prime extragalactic areas: two fields at North Ecliptic Pole (NEP); seven gravitationally lensing clusters; high redshift proto-clusters; iconic backlit VV 191 galaxy system map its dust attenuation. also includes NIRISS spectra one NEP NIRSpec high-redshift quasars....
We present early results regarding the morphological and structural properties of galaxies seen with James Webb Space Telescope at $z > 3$ in Early Release Observations SMACS 0723, a galaxy cluster $z=0.39$. investigate, for first time, optical morphologies significant number accurate photometric redshifts this field to determine form structure relatively universe. use visual \textsc{Morfometryka} measures perform quantitative morphology measurements, both parametric light profile fitting...
Abstract A Type Ia supernova (SN) at z = 1.78 was discovered in James Webb Space Telescope Near Infrared Camera imaging of the galaxy cluster PLCK G165.7+67.0 (G165; 0.35). The SN is situated 1.5–2 kpc from host-galaxy nucleus and appears three different locations as a result gravitational lensing by G165. These data can yield value for Hubble’s constant using time delays this multiply imaged that we call “SN H0pe.” Over cluster, identified 21 image multiplicities, confirmed five them...
Abstract The first James Webb Space Telescope (JWST) Near InfraRed Camera imaging in the field of galaxy cluster PLCK G165.7+67.0 ( z = 0.35) uncovered a Type Ia supernova (SN Ia) at 1.78, called “SN H0pe.” Three different images this one SN were detected as result strong gravitational lensing, each traversing path spacetime, thereby inducing relative delay arrival image. Follow-up JWST observations all three enabled photometric and rare spectroscopic measurements two time delays. Following...
Abstract The first deep field images from the James Webb Space Telescope (JWST) of galaxy cluster SMACS J0723.3-7327 reveal a wealth new lensed at uncharted infrared wavelengths, with unprecedented depth and resolution. Here we securely identify 14 sets multiply imaged galaxies totaling 42 images, adding to five bright already known Hubble data. We find examples arcs crossing critical curves, allowing detailed community follow-up, such as JWST spectroscopy for precise redshift...
The first James Webb Space Telescope (JWST) data on the massive colliding cluster El Gordo allow for 23 known families of multiply lensed images to be confirmed and eight new members these identified. Based families, which have been spectroscopically by MUSE, we derived an initial lens model. This model guided identification 37 additional galaxies, among 28 are entirely systems, nine were previously known. determined geometric redshifts systems. agree reasonably well with spectroscopic or...
We analyse the photometric and spectroscopic properties of four galaxies in epoch reionisation (EoR) within SMACS 0723 JWST Early Release Observations field. Given known redshifts these sources, we investigated accuracy with which can be derived using NIRCam photometry alone, finding that F115W imaging is essential to distinguish between z~8 high equivalent width (EW) [O III] {\lambda}5007 emission z~10 Balmer break galaxies. find all sources exhibit strong (\geq 0.6 mag) F356W-F444W...
Abstract A bright ( m F150W,AB = 24 mag), z 1.95 supernova (SN) candidate was discovered in JWST/NIRCam imaging acquired on 2023 November 17. The SN is quintuply imaged as a result of strong gravitational lensing by foreground galaxy cluster, detected three locations, and remarkably the second lensed found same host galaxy. previous called “Requiem,” therefore new named “Encore.” This makes MACS J0138.0−2155 cluster first known system to produce more than one multiply SN. Moreover, both...
Abstract Supernova (SN) SN H0pe is a gravitationally lensed, triply imaged, Type Ia (SN Ia) discovered in James Webb Space Telescope imaging of the PLCK G165.7+67.0 cluster galaxies. Well-observed multiply imaged SNe provide rare opportunity to constrain Hubble constant ( H 0 ), by measuring relative time delay between images and modeling foreground mass distribution. located at z = 1.783 first with sufficient light-curve sampling long enough delays for an inference. Here we present...
We model the strong lensing effect in galaxy cluster PSZ1 G311.65-18.48 (z=0.443) with an improved version of hybrid method WSLAP+. extend number constraints by including position critical points, which are combined classic positional lensed galaxies. pay special attention to a transient candidate source (Tr) previously discovered giant Sunburst arc (z=2.37). Our lens predicts Tr be within fraction arcsecond from curve, having larger magnification factor than found, but still not large...
Abstract 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, lensed Cosmic Noon galaxy, hosts young cluster with escaping Lyman continuum radiation. Analyzing archival Hubble Space Telescope images emission line data from Very Large Telescope/MUSE X-shooter, we construct physical model its surrounding photoionized nebula. We confirm is ≲4 Myr old, extremely massive M ⋆ ∼ 10...
The first James Webb Space Telescope ({\it JWST}) Near InfraRed Camera (NIRCam) imaging in the field of galaxy cluster PLCK G165.7+67.0 ($z=0.35$) uncovered a Type Ia supernova (SN~Ia) at $z=1.78$, called ``SN H0pe." Three different images this one SN were detected as result strong gravitational lensing, each traversing path spacetime, thereby inducing relative delay arrival image. Follow-up {\it JWST} observations all three enabled photometric and rare spectroscopic measurements two time...
Abstract The PASSAGES (Planck All-Sky Survey to Analyze Gravitationally-lensed Extreme Starbursts) collaboration has recently defined a sample of 30 gravitationally lensed dusty star-forming galaxies (DSFGs). These rare, submillimeter-selected objects enable high-resolution views the most extreme sites star formation in at cosmic noon. Here, we present first major compilation strong lensing analyses using lenstool for PASSAGES, including 15 spanning z = 1.1–3.3, complementary information...
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 bands NIRCam imaging were obtained in the ``Prime Extragalactic Areas for Reionization and Lensing Science'' (``PEARLS'') program. PSF-matched photometry across Hubble (HST) filters supplies new photometric redshifts. A light-traces-mass lens model based on 56 image multiplicities identifies two mass peaks yields a...
Abstract SN H0pe is a triply imaged supernova (SN) at redshift z = 1.78 discovered using the James Webb Space Telescope. In order to classify spectroscopically and measure relative time delays of its three images (designated A, B, C), we acquired NIRSpec follow-up spectroscopy spanning 0.6–5 μ m. From high signal-to-noise spectra two bright B C, first SN, whose most closely match those 1994D 2013dy, as Type Ia SN. We identify prominent blueshifted absorption features corresponding Si ii λ...
Abstract We suggest that “Godzilla” of the lensed Sunburst galaxy ( z = 2.37) is a young super star cluster powering nebula gravitationally trapped stellar ejecta. Employing Hubble Space Telescope photometry and spectroscopy from Very Large (VLT) MUSE VLT/X-Shooter, we infer physical chemical properties nebula, finding Godzilla young, 4–6 Myr; massive, 2 × 10 6 M ⊙ (1000/ μ ); metallicity, Z ≃ 0.25 ; has compact far-UV component ≲1 pc ), where flux magnification factor. The gas significantly...
Abstract We report the discovery of an extremely magnified star at redshift z = 2.65 in James Webb Space Telescope (JWST) NIRISS pre-imaging A2744 galaxy-cluster field. The star’s background host galaxy lies on a fold caustic foreground lens, and cluster creates pair images region close to lensed star. identified bright transient one merging distance ∼0.″15 from critical curve by subtracting JWST F115W F150W imaging coadditions archival Hubble (HST) F105W F125W F140W F160W images,...
We present a detailed study of the Planck-selected binary galaxy cluster PLCK G165.7+67.0 (G165; $z$=0.348). A multiband photometric catalog is generated that incorporates new imaging from Large Binocular Telescope/Large Camera and Spitzer/IRAC to existing imaging. To cope with different image characteristics, robust methods are applied in extraction matched-aperture photometry. Photometric redshifts estimated for 143 galaxies 4 arcmin$^{2}$ field overlap covered by all these data. confirm...
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 part "Prime Extragalactic Areas for Reionization and Lensing Science" (PEARLS) JWST GTO program (# 1176) on 2023 March 30 (AstroNote 2023-96; Frye et al. 2023). The is compact source associated with background that stretched triply-imaged by cluster's strong gravitational lensing. This paper reports spectra 950-1370 nm observer frame two...
Abstract Gradients in the mass-to-light ratio of distant galaxies impede our ability to characterize their size and compactness. The long-wavelength filters JWST’s NIRCam offer a significant step forward. For at Cosmic Noon ( z ∼ 2), this regime corresponds rest-frame near-infrared, which is less biased toward young stars captures emission from bulk galaxy’s stellar population. We present an initial analysis extraordinary lensed dusty star-forming galaxy = 2.3 behind El Gordo cluster 0.87),...
SN H0pe is a triply imaged supernova (SN) at redshift $z=1.78$ discovered using the James Webb Space Telescope (JWST). In order to classify spectroscopically and measure relative time delays of its three images (designated A, B, C), we acquired NIRSpec follow-up spectroscopy spanning 0.6 5 microns. From high signal-to-noise spectra two bright B C, first SN, whose most closely match those 1994D 2013dy, as Type Ia SN. We identify prominent blueshifted absorption features corresponding Si II...
A bright ($m_{\rm F150W,AB}$=24 mag), $z=1.95$ supernova (SN) candidate was discovered in JWST/NIRCam imaging acquired on 2023 November 17. The SN is quintuply-imaged as a result of strong gravitational lensing by foreground galaxy cluster, detected three locations, and remarkably the second lensed found same host galaxy. previous called "Requiem", therefore new named "Encore". This makes MACS J0138.0$-$2155 cluster first known system to produce more than one multiply-imaged SN. Moreover,...
Abstract Recent Galactic plane surveys of dust continuum emission at long wavelengths have identified a population dense, massive clumps with no evidence for ongoing star formation. These starless clump candidates are excellent sites to search the initial phases formation before feedback from affects clump. In this study, we spectroscopic signature inflowing gas toward clumps, some which enough form star. We observed 101 in Bolocam Plane Survey (BGPS) <?CDATA ${\mathrm{HCO}}^{+}$?> J = 1−0...
In this work, we present a constraint on the abundance of supergiant (SG) stars at redshift z ≈ 1, based recent observations strongly lensed arc redshift. First derived free-form model MACS J0416.1-2403 using data from Beyond Ultra-deep Frontier Fields and Legacy Observations (BUFFALO) program. The new lens is 72 multiply galaxies that produce 214 multiple images, making it largest sample spectroscopically confirmed cluster. larger coverage in BUFFALO allowed us to measure shear up outskirts...
A Type Ia supernova (SN) at $z=1.78$ was discovered in James Webb Space Telescope Near Infrared Camera imaging of the galaxy cluster PLCK G165.7+67.0 (G165; $z = 0.35$). The SN is situated 1.5-2 kpc from host-galaxy nucleus and appears three different locations as a result gravitational lensing by G165. These data can yield value for Hubble's constant using time delays this multiply-imaged that we call "SN H0pe." Over cluster, identified 21 image multiplicities, confirmed five them...