A5069381843- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Radio Astronomy Observations and Technology
- Scientific Research and Discoveries
- Cosmology and Gravitation Theories
- Isotope Analysis in Ecology
- Astro and Planetary Science
- Astrophysics and Cosmic Phenomena
- Advanced Vision and Imaging
- Adaptive optics and wavefront sensing
- Image and Object Detection Techniques
- Dark Matter and Cosmic Phenomena
- Real-time simulation and control systems
- Geophysics and Gravity Measurements
- Space Exploration and Technology
- Planetary Science and Exploration
- Gamma-ray bursts and supernovae
Pontificia Universidad Católica de Chile
2020-2023
Abstract We present a new measurement of the Ly α luminosity function (LF) at redshift z = 6.9, finding moderate evolution from 5.7 that is consistent with fully or largely ionized ∼ 7 intergalactic medium. Our result based on four fields LAGER (Lyman Alpha Galaxies in Epoch Reionization) project. survey volume 6.1 × 10 6 Mpc 3 double next largest survey. combine two (WIDE12 and GAMA15A) previously reported (COSMOS CDFS). In fields, we identify N 95 6.9 emitter (LAEs) candidates,...
Massive star-forming galaxies in the high-redshift universe host large reservoirs of cold gas their circumgalactic medium (CGM). Traditionally, these have been linked to diffuse H I Lyman- α (Ly ) emission extending beyond ≈10 kpc scales. In recent years, millimeter and submillimeter observations started identify even colder CGM through molecular and/or atomic tracers such as [C II ] 158 μm transition. this context, we studied well-known J1000+0234 system at z = 4.54 that hosts a massive...
We present gravitational-arc tomography of the cool-warm enriched circumgalactic medium (CGM) an isolated galaxy (``G1'') at $z \approx 0.77$. Combining VLT/MUSE adaptive-optics and Magellan/MagE echelle spectroscopy we obtain partially-resolved kinematics MgII in absorption [OII] emission. The unique arc configuration allows us to probe 42 spatially independent positions transverse G1, plus 4 front it. cover G1's minor major axes impact parameters $\approx 10-30$ kpc 60$ kpc, respectively....
High-redshift quasars are thought to live in the densest regions of space which should be made evident by an overdensity galaxies around them. However, campaigns identify these overdensities through search Lyman Break Galaxies (LBGs) and $\alpha$ emitters (LAEs) have had mixed results. These may explained either small field view some experiments, broad redshift ranges targeted LBG searches, inherent large uncertainty quasar redshifts estimated from UV emission lines, makes it difficult place...
Abstract Spatially extended halos of H i Ly α emission are now ubiquitously found around high-redshift star-forming galaxies. But our understanding the nature and powering mechanisms these is still hampered by complex radiative transfer effects line limited angular resolution. In this paper, we present resolved Multi Unit Spectroscopic Explorer (MUSE) observations SGAS J122651.3+215220, a strongly lensed pair L * galaxies at z = 2.92 embedded in halo (6.2 ± 1.3) × 10 42 erg s −1 . Globally,...
Context: Outflows from low-mass star-forming galaxies are a fundamental ingredient for models of galaxy evolution and cosmology. Aims: The onset kpc-scale ionised filaments in the halo metal-poor compact dwarf SBS 0335-052E was previously not linked to an outflow. We here we investigate whether these provide evidence Methods: obtained new VLT/MUSE WFM deep NRAO/VLA B-configuration 21cm data galaxy. MUSE morphology, kinematics, emission line ratios H$\beta$/H$\alpha$...
ABSTRACT The Centaur (60558) Echeclus was discovered on 2000 March 03, orbiting between the orbits of Jupiter and Uranus. After exhibiting frequent outbursts, it also received a comet designation, 174P. If ejected material can be source debris to form additional structures, studying surroundings an active body like provide clues about formation scenarios rings, jets, or dusty shells around small bodies. Stellar occultation is handy technique for this kind investigation, as can, from...
Abstract We report spectroscopic confirmations of 15 Ly α galaxies at z ∼ 7, implying a confirmation rate ∼80% on candidates selected from the Galaxies in Epoch Reionization (LAGER), which is largest (24 deg 2 ) survey aimed finding emitters (LAEs) 7 and uses deep narrowband imaging Dark Energy Camera CTIO. LAEs high redshifts are sensitive probes cosmic reionization, robust effective method for selecting large number LAEs. In this work, we present results follow-up LAE two LAGER fields,...
The Multi-Unit Spectroscopic Explorer instrument (MUSE), is an integral-field spectrograph at one of the Nasmyth foci 8m-class Yepun telescope Paranal observatory. MUSE's most powerful modes use Adaptive Optics Facility consisting a Deformable Secondary Mirror with over 1000 actuators commanded by real-time computer up to times per second. At core system are 4 laser guide stars monitored GALACSI, wave-front sensor system. MUSE functions two modes: Wide-Field Mode (1'x1' field), making Ground...
ABSTRACT In recent years, the astronomical scientific community has made significant efforts to automate quasars’ detection. Automatic classification of these objects is challenging since they are very distant and appear as point sources, outnumbered by other sources. Thus, performing automatic morphological not straightforward; colour dimension seems better a key concept. Previous work using machine learning tools proposed classifiers that use features such magnitude colour, working only...
Massive star-forming galaxies in the high-redshift universe host large reservoirs of cold gas their circumgalactic medium (CGM). Traditionally, these have been linked to diffuse H I Lyman-$\alpha$ (Ly$\alpha)$ emission extending beyond $\approx 10$ kpc scales. In recent years, millimeter/submillimeter observations are starting identify even colder CGM through molecular and/or atomic tracers such as [C II] $158\,\mu$m transition. this context, we study well-known J1000+0234 system at $z=4.54$...
High-redshift quasars are thought to live in the densest regions of space, which should be made evident by an overdensity galaxies around them. However, campaigns identify these overdensities searching for Lyman-break (LBGs) and Lyman α emitters (LAEs) have had mixed results. These may explained either small field view some experiments, broad redshift ranges targeted LBG searches, inherently high uncertainty quasar redshifts estimated from ultraviolet emission lines, makes it difficult place...
The epoch of reionization is a landmark in structure formation and galaxy evolution. How it happened still not clear, especially regarding which population objects was responsible for contributing the bulk ionizing photons to this process. Doubly peaked Lyman-alpha profiles are particular interest since they hold information about escape radiation environment surrounding source. We wish understand mechanisms Ly alpha Lyalpha ts fi emitters during time origin doubly profile. also estimate...
The epoch of reionization is a landmark in structure formation and galaxy evolution. How it happened still not clear, especially regarding which population objects was responsible for contributing the bulk ionizing photons toward this process. Doubly-peaked Lyman-Alpha profiles are particular interest since they hold information about escape radiation environment surrounding source. We wish to understand mechanisms emitters during time origin doubly-peaked Lyman-alpha profile as well...
The Centaur (60558) Echeclus was discovered on March 03, 2000, orbiting between the orbits of Jupiter and Uranus. After exhibiting frequent outbursts, it also received a comet designation, 174P. If ejected material can be source debris to form additional structures, studying surroundings an active body like provide clues about formation scenarios rings, jets, or dusty shells around small bodies. Stellar occultation is handy technique for this kind investigation, as can, from Earth-based...