A. Palmese
A5050520135- Galaxies: Formation, Evolution, Phenomena
- Gamma-ray bursts and supernovae
- Astronomy and Astrophysical Research
- Cosmology and Gravitation Theories
- Stellar, planetary, and galactic studies
- Pulsars and Gravitational Waves Research
- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Astronomical Observations and Instrumentation
- Dark Matter and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Adaptive optics and wavefront sensing
- Geophysics and Gravity Measurements
- CCD and CMOS Imaging Sensors
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Remote Sensing in Agriculture
- Particle physics theoretical and experimental studies
- Astrophysics and Star Formation Studies
- Astro and Planetary Science
- Gaussian Processes and Bayesian Inference
- Impact of Light on Environment and Health
- Scientific Research and Discoveries
- History and Developments in Astronomy
- Calibration and Measurement Techniques
Carnegie Mellon University
2023-2025
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
2021-2024
University of California, Berkeley
2022-2024
Campbell Collaboration
2021-2023
Fermi National Accelerator Laboratory
2016-2022
University of Chicago
2020-2022
Kavli Institute for Particle Astrophysics and Cosmology
2022
University of Southampton
2021
Oak Ridge National Laboratory
2021
University College London
2016-2020
We present UV, optical, and NIR photometry of the first electromagnetic counterpart to a gravitational wave source from Advanced LIGO/Virgo, binary neutron star merger GW170817. Our data set extends discovery optical at $0.47$ days $18.5$ post-merger, includes observations with Dark Energy Camera (DECam), Gemini-South/FLAMINGOS-2 (GS/F2), {\it Hubble Space Telescope} ({\it HST}). The spectral energy distribution (SED) inferred this $0.6$ is well described by blackbody model $T\approx 8300$...
This overview paper describes the legacy prospect and discovery potential of Dark Energy Survey (DES) beyond cosmological studies, illustrating it with examples from DES early data.DES is using a wide-field camera (DECam) on 4 m Blanco Telescope in Chile to image 5000 sq deg sky five filters (grizY).
We present constraints on cosmological parameters from the Pantheon+ analysis of 1701 light curves 1550 distinct Type Ia supernovae (SNe Ia) ranging in redshift $z=0.001$ to 2.26. This work features an increased sample size, span, and improved treatment systematic uncertainties comparison original Pantheon results a factor two improvement constraining power. For Flat$\Lambda$CDM model, we find $\Omega_M=0.334\pm0.018$ SNe alone. Flat$w_0$CDM measure $w_0=-0.90\pm0.14$ alone, H$_0=73.5\pm1.1$...
Abstract We present the Dark Energy Camera (DECam) discovery of optical counterpart first binary neutron star merger detected through gravitational-wave emission, GW170817. Our observations commenced 10.5 hr post-merger, as soon localization region became accessible from Chile. imaged 70 deg 2 in i and z bands, covering 93% initial integrated probability, to a depth necessary identify likely counterparts (e.g., kilonova). At 11.4 post-merger we bright transient located nucleus NGC 4993 at...
(Abridged) We present the first public release of high-quality data products (DR1) from Hi-GAL, {\em Herschel} infrared Galactic Plane Survey. Hi-GAL is keystone a suite continuum surveys near-IR to radio, and covers five wavebands at 70, 160, 250, 350 500 micron, encompassing peak spectral energy distribution cold dust for 8 < T 50K. This inner Milky Way in longitude range 68{\deg} > l -70{\deg} |b|<1{\deg} latitude strip. Photometric maps have been produced with ROMAGAL pipeline, that...
We perform a comprehensive study of Milky Way (MW) satellite galaxies to constrain the fundamental properties dark matter (DM). This analysis fully incorporates inhomogeneities in spatial distribution and detectability MW satellites marginalizes over uncertainties mapping between DM halos, system, disruption subhalos by disk. Our results are consistent with cold, collisionless paradigm yield strongest cosmological constraints date on particle models warm, interacting, fuzzy matter. At 95%...
We present an improved measurement of the Hubble constant (H_0) using 'inverse distance ladder' method, which adds information from 207 Type Ia supernovae (SNe Ia) Dark Energy Survey (DES) at redshift 0.018 < z 0.85 to existing measurements 122 low (z 0.07) SNe (Low-z) and Baryon Acoustic Oscillations (BAOs). Whereas traditional H_0 with use a ladder parallax Cepheid variable stars, inverse relies on absolute BAOs calibrate intrinsic magnitude Ia. find = 67.8 +/- 1.3 km s-1 Mpc-1...
We constrain the mass–richness scaling relation of redMaPPer galaxy clusters identified in Dark Energy Survey Year 1 data using weak gravitational lensing. split into 4 × 3 bins richness λ and redshift |$z$| for ≥ 20 0.2 ≤ 0.65 measure mean masses these their stacked lensing signal. By modelling as 〈M200m|λ, |$z$|〉 = M0(λ/40)F((1 + |$z$|)/1.35)G, we normalization at 5.0 per cent level, finding M0 [3.081 ± 0.075(stat) 0.133(sys)] · 1014 M⊙ 40 0.35. The recovered index is F 1.356 0.051 (stat)...
ABSTRACT We present a blind time-delay cosmographic analysis for the lens system DES J0408−5354. This is extraordinary presence of two sets multiple images at different redshifts, which provide opportunity to obtain more information cost increased modelling complexity with respect previously analysed systems. perform detailed mass distribution this using three band Hubble Space Telescope imaging. combine measured time delays, line-of-sight central velocity dispersion deflector, and...
We present the first constraints on cosmology from Dark Energy Survey (DES), using weak lensing measurements preliminary Science Verification (SV) data. use 139 square degrees of SV data, which is less than 3% full DES survey area. Using cosmic shear 2-point over three redshift bins we find ${\ensuremath{\sigma}}_{8}({\mathrm{\ensuremath{\Omega}}}_{\mathrm{m}}/0.3{)}^{0.5}=0.81\ifmmode\pm\else\textpm\fi{}0.06$ (68% confidence), after marginalizing 7 systematics parameters and 3 other...
We describe the Dark Energy Survey (DES) photometric data set assembled from first three years of science operations to support DES Year 3 cosmology analyses, and provide usage notes aimed at broad astrophysics community. Y3 Gold improves on previous releases DES, Y1 Data Release 1 (DES DR1), presenting an expanded curated that incorporates algorithmic developments in image detrending processing, calibration, object classification. comprises nearly 5000 square degrees grizY imaging south...
Abstract We report the results of a systematic search for ultra-faint Milky Way satellite galaxies using data from Dark Energy Survey (DES) and Pan-STARRS1 (PS1). Together, DES PS1 provide multi-band photometry in optical/near-infrared wavelengths over ∼80% sky. Our targets ∼25,000 deg 2 high-Galactic-latitude sky reaching 10 σ point-source depth ≳22.5 mag g r bands. While galaxy searches have been performed independently on before, this is first time that self-consistent across both sets....
The population of Milky Way (MW) satellites contains the faintest known galaxies and thus provides essential insight into galaxy formation dark matter microphysics. Here we combine a model galaxy--halo connection with newly derived observational selection functions based on searches for in photometric surveys over nearly entire high Galactic latitude sky. In particular, use cosmological zoom-in simulations MW-like halos that include realistic Large Magellanic Cloud (LMC) analogs to fit...
ABSTRACT We present and characterize the galaxy shape catalogue from first 3 yr of Dark Energy Survey (DES) observations, over an effective area 4143 deg2 southern sky. describe our data analysis process self-calibrating shear measurement pipeline metacalibration, which builds improves upon used in DES Year 1 several aspects. The weak-lensing consists 100 204 026 galaxies, measured riz bands, resulting a weighted source number density neff = 5.59 gal arcmin−2 corresponding noise σe 0.261....
Determining the distribution of redshifts galaxies observed by wide-field photometric experiments like Dark Energy Survey is an essential component to mapping matter density field with gravitational lensing. In this work we describe methods used assign individual weak lensing source from Year 3 Weak Lensing Source Catalogue four tomographic bins and estimate redshift distributions in these bins. As first application data, validate that assumptions made apply DES Y3 develop a full treatment...
We present angular diameter measurements obtained by measuring the position of Baryon Acoustic Oscillations (BAO) in an optimised sample galaxies from first three years Dark Energy Survey data (DES Y3). The consists 7 million distributed over a footprint 4100 deg$^2$ with $0.6 < z_{\rm photo} 1.1$ and typical redshift uncertainty $0.03(1+z)$. selection is same as BAO measurement year DES data, but analysis presented here uses times area, extends to higher makes number improvements, including...
We present a new constraint on the Hubble constant $H_0$ using sample of well-localized gravitational wave (GW) events detected during first three LIGO/Virgo observing runs as dark standard sirens. In case sirens, unique host galaxy is not identified, and redshift information comes from distribution potential galaxies. From third run detections, we add asymmetric-mass binary black hole GW190412, high-confidence GW candidates S191204r, S200129m, S200311bg to sirens analyzed. Our contains top...
ABSTRACT We measure the current expansion rate of Universe, Hubble’s constant $H_0$, by calibrating absolute magnitudes supernovae to distances measured baryon acoustic oscillations (BAO). This ‘inverse distance ladder’ technique provides an alternative using nearby measurements, replacing calibration with a high-redshift anchor. use recent release 1829 from Dark Energy Survey spanning $0.01\lt z\lt 1.13$ anchored oscillation measurements Spectroscopic Instrument (DESI) $0.30 \lt...
Abstract We present the results of our multiwavelength (X-ray to radio) follow-up campaign Einstein Probe transient EP240408a. The initial 10 s trigger displayed bright soft X-ray (0.5–4 keV) radiation with peak luminosity L X ≳ 49 (10 50 ) erg −1 for an assumed redshift z 0.5 (2.0). Neil Gehrels Swift Observatory and Neutron star Interior Composition ExploreR discovered a fading counterpart lasting ∼5 days (observer frame), which showed long-lived (∼4 days) plateau-like emission ( t −0.5...
We present photometric redshift estimates for galaxies used in the weak lensing analysis of Dark Energy Survey Science Verification (DES SV) data. Four model- or machine learning-based methods -- ANNZ2, BPZ calibrated against BCC-Ufig simulations, SkyNet, and TPZ are analysed. For training, calibration, testing these methods, we construct a catalogue spectroscopically confirmed matched DES SV The performance is evaluated spectroscopic catalogue, focusing on metrics relevant analyses, with...
Abstract We present a multi-messenger measurement of the Hubble constant H 0 using binary–black-hole merger GW170814 as standard siren, combined with photometric redshift catalog from Dark Energy Survey (DES). The luminosity distance is obtained gravitational wave signal detected by Laser Interferometer Gravitational-Wave Observatory (LIGO)/Virgo Collaboration (LVC) on 2017 August 14, and information provided DES Year 3 data. Black hole mergers such are expected to lack bright...
We present a measurement of the Hubble constant $H_0$ using gravitational wave (GW) event GW190814, which resulted from coalescence 23 $M_\odot$ black hole with 2.6 compact object, as standard siren. No compelling electromagnetic counterpart has been identified for this event, thus our analysis accounts thousands potential host galaxies within statistical framework. The redshift information is obtained photometric (photo-$z$) catalog Dark Energy Survey. luminosity distance provided by...
ABSTRACT As the statistical power of galaxy weak lensing reaches per cent level precision, large, realistic, and robust simulations are required to calibrate observational systematics, especially given increased importance object blending as survey depths increase. To capture coupled effects in both shear photometric redshift calibration, we define effective distribution for lensing, nγ(z), describe how estimate it using image simulations. We use an extensive suite tailored characterize...