D. Carollo
A5107246052- Gamma-ray bursts and supernovae
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Cosmic Phenomena
- Astrophysics and Star Formation Studies
Trieste Astronomical Observatory
2023-2024
Abstract We present cosmological constraints from the sample of Type Ia supernovae (SNe Ia) discovered and measured during full 5 yr Dark Energy Survey (DES) SN program. In contrast to most previous samples, in which SNe are classified based on their spectra, we classify DES using a machine learning algorithm applied light curves four photometric bands. Spectroscopic redshifts acquired dedicated follow-up survey host galaxies. After accounting for likelihood each being an Ia, find 1635...
We present cosmological constraints from the sample of Type Ia supernovae (SN Ia) discovered during full five years Dark Energy Survey (DES) Supernova Program. In contrast to most previous samples, in which SN are classified based on their spectra, we classify DES SNe using a machine learning algorithm applied light curves four photometric bands. Spectroscopic redshifts acquired dedicated follow-up survey host galaxies. After accounting for likelihood each being Ia, find 1635 redshift range...
We report the discovery of Pegasus IV, an ultra-faint dwarf galaxy found in archival data from Dark Energy Camera processed by DECam Local Volume Exploration Survey. IV is a compact, stellar system ($r_{1/2} = 41^{+8}_{-6}$ pc; $M_V -4.25 \pm 0.2$ mag) located at heliocentric distance $90^{+4}_{-6}$ kpc. Based on spectra seven non-variable member stars observed with Magellan/IMACS, we confidently resolve IV's velocity dispersion, measuring $\sigma_{v} 3.3^{+1.7}_{-1.1} \text{ km s}^{-1}$...
Abstract We present the full Hubble diagram of photometrically classified Type Ia supernovae (SNe Ia) from Dark Energy Survey supernova program (DES-SN). DES-SN discovered more than 20,000 SN candidates and obtained spectroscopic redshifts 7000 host galaxies. Based on light-curve quality, we select 1635 identified SNe with redshift 0.10 < z 1.13, which is largest sample any single survey increases number known > 0.5 by a factor 5. In companion paper, cosmological results combined 194...
We make use of the unprecedented depth, spatial resolution, and field view Early Release Observations (EROs) Perseus galaxy cluster to detect characterise dwarf population in this massive system. Using a dedicated annotation tool, high-resolution VIS combined VIS+Near Infrared Spectrometer Photometer (NISP) colour images were visually inspected candidates identified. Their morphologies, presence nuclei, their globular (GC) richness assessed, complementing an automatic detection GC...