A5109637578- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Cosmology and Gravitation Theories
- Adaptive optics and wavefront sensing
- CCD and CMOS Imaging Sensors
- Geophysics and Gravity Measurements
- History and Developments in Astronomy
- Astrophysics and Star Formation Studies
- Historical Astronomy and Related Studies
- Seismic and Structural Analysis of Tall Buildings
- Radio Astronomy Observations and Technology
- Dark Matter and Cosmic Phenomena
- Solar and Space Plasma Dynamics
- Advanced Fluorescence Microscopy Techniques
- Antenna Design and Optimization
- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
University College London
2024-2025
Abstract In preparation for the next generation of galaxy redshift surveys, and in particular year-one data release from Dark Energy Spectroscopic Instrument (DESI), we investigate consistency a variety effective field theory models that describe galaxy-galaxy power spectra space into quasi-linear regime using 1-loop perturbation theory. These are employed pipelines velocileptors , PyBird Folps ν . While these have been validated independently, detailed comparison with consistent choices has...
Abstract We report results from a systematic wide-area search for faint dwarf galaxies at heliocentric distances 0.3 to 2 Mpc using the full 6 yr of data Dark Energy Survey (DES). Unlike previous searches over DES data, this specifically targeted field population located beyond Milky Way virial radius. derive our detection efficiency faint, resolved in Local Volume with set synthetic and expect be complete M V ∼ (−7, −10) mag D = (0.3, 2.0) Mpc. find no new dwarfs footprint, but we discovery...
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 7,000 host galaxies. Based on light-curve quality, we select 1635 photometrically-identified SNe with redshift 0.10$< z <$1.13, which is largest sample any single survey increases number known $z>0.5$ by a factor five. In companion paper, cosmological results...
We present baryon acoustic oscillation (BAO) measurements from more than 14 million galaxies and quasars drawn the Dark Energy Spectroscopic Instrument (DESI) Data Release 2 (DR2), based on three years of operation. For cosmology inference, these galaxy are combined with DESI Lyman-$\alpha$ forest BAO results presented in a companion paper. The DR2 consistent DR1 SDSS, their distance-redshift relationship matches those recent compilations supernovae (SNe) over same redshift range. well...
This paper is a tribute to an outstanding teacher, mentor, and finally friend who contributed my life in more ways than I ever got convey her life. add it the long list of tributes pointing many gifts graces she so freely bestowed upon us. May memory live on our hearts minds.
Abstract Low-surface-brightness galaxies (LSBGs) are excellent probes of quenching and other environmental processes near massive galaxies. We study an extensive sample LSBGs hosts in the local universe that distributed across a diverse range environments. The with surface-brightness <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi>μ</mml:mi> </mml:mrow> <mml:mi>eff</mml:mi> <mml:mo>,</mml:mo> <mml:mi mathvariant="italic">g</mml:mi>...