A5006897068- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Photocathodes and Microchannel Plates
- Spectroscopy and Laser Applications
- Astrophysics and Cosmic Phenomena
- Statistical and numerical algorithms
- Historical Astronomy and Related Studies
- Biblical Studies and Interpretation
- Radio Astronomy Observations and Technology
- Astro and Planetary Science
- Laser Design and Applications
- Scientific Measurement and Uncertainty Evaluation
- Atmospheric Ozone and Climate
- Historical and Architectural Studies
Universidad Autónoma de Madrid
2020-2023
Australian Astronomical Observatory
2021-2023
Macquarie University
2021-2023
ARC Centre of Excellence for All-sky Astrophysics
2022-2023
ASTRO-3D
2022-2023
WEAVE, the new wide-field, massively multiplexed spectroscopic survey facility for William Herschel Telescope, will see first light in late 2022. WEAVE comprises a 2-degree field-of-view prime-focus corrector system, nearly 1000-multiplex fibre positioner, 20 individually deployable 'mini' integral field units (IFUs), and single large IFU. These systems feed dual-beam spectrograph covering wavelength range 366$-$959\,nm at $R\sim5000$, or two shorter ranges $R\sim20\,000$. After summarising...
The Early Release Observations (ERO) from Euclid have detected several new galaxy-galaxy strong gravitational lenses, with the all-sky survey expected to find 170,000 systems, greatly enhancing studies of dark matter, energy, and constraints on cosmological parameters. As a first step, visual inspection all galaxies in one ERO fields (Perseus) was carried out identify candidate lensing systems compared predictions Convolutional Neural Networks (CNNs). However, entire data set is too large...
ABSTRACT We study recent changes on the star-formation history (SFH) of galaxies by means ageing diagram (AD), tracing fraction stars formed during last ∼20 Myr through equivalent width $\rm H\alpha$ line and ∼1−3 Gyr dust-corrected optical colour (g − r)0or Balmer break. provide a physical characterization using Pipe3Destimates SFH Calar Alto Legacy Integral Field Area Mapping Nearby Galaxies at Apache Point Observatory galaxies, in combination with predictions from IllustrisTNG-100. Our...
WEAVE, the new wide-field, massively multiplexed spectroscopic survey facility for William Herschel Telescope, will see first light in late 2022. WEAVE comprises a 2-degree field-of-view prime-focus corrector system, nearly 1000-multiplex fibre positioner, 20 individually deployable 'mini' integral field units (IFUs), and single large IFU. These systems feed dual-beam spectrograph covering wavelength range 366$-$959\,nm at $R\sim5000$, or two shorter ranges $R\sim20\,000$. After summarising...
For years, the extragalactic community has divided galaxies in two distinct populations. One of them, featuring blue colours, is actively forming stars, while other made up "red-and-dead" objects with negligible star formation. Yet, are these really dead? Here we would like to highlight that, as previously reported by several independent groups, state-of-the-art cosmological numerical simulations predict existence a large number quenched that have not formed any over last few Gyr. In...
ABSTRACT According to their specific star formation rate (sSFR), galaxies are often divided into ‘star-forming’ and ‘passive’ populations. It is argued that the former define a narrow ‘main sequence of star-forming galaxies’ (MSSF) form sSFR(M*), whereas feature negligible levels activity. Here we use data from Sloan Digital Sky Survey Galaxy And Mass Assembly survey at z < 0.1 constrain conditional probability sSFR given stellar mass. We show whole population in local Universe...
ABSTRACT The connection between quenching mechanisms, which rapidly turn star-forming systems into quiescent, and the properties of galaxy population remains difficult to discern. In this work we investigate physical MaNGA SAMI galaxies at different stages their star formation history. Specifically, compare with signatures recent (Quenched) – $\rm H \, \alpha$ in absorption low Dn(4000) rest active (Retired Ageing, respectively). analysis is performed terms characteristics such as total...
ABSTRACT This work investigates the fundamental mechanism(s) that drive galaxy evolution in local Universe. By comparing two proxies of star formation sensitive to different time-scales, such as EW($\rm H\,\alpha$) and colours like g − r, one may distinguish between smooth secular (ageing) sudden changes (quenching) recent history galaxies. Building upon results obtained from a former study based on 80 000 Sloan Digital Sky Survey (SDSS) single-fibre measurements, we now focus spatially...
Nebular emission lines are powerful diagnostics for the physical processes at play in galaxy formation and evolution. Moreover, emission-line galaxies (ELGs) one of main targets current forthcoming spectroscopic cosmological surveys. We investigate contributions to line luminosity functions (LFs) different populations local Universe, providing a benchmark future surveys earlier cosmic epochs. The large statistics observations from SDSS DR7 Main sample MPA-JHU spectral catalogue enabled us...
ABSTRACT We present a self-consistent prediction of the interstellar radiation field (ISRF), from extreme ultraviolet (EUV) to submm range, based on two chemical evolution models Milky-Way-like galaxy . To this end, we develop new tool called mixclask include gas emission, absorption, and scattering photoionization code cloudy in Monte Carlo radiative transfer skirt. Both algorithms are invoked iteratively, until physical properties medium (ISM) converge. have designed first test,...
Context. Nebular emission lines are powerful diagnostics for the physical processes at play in galaxy formation and evolution. Moreover, emission-line galaxies (ELGs) one of main targets current forthcoming spectroscopic cosmological surveys. Aims. We investigate contributions to line luminosity functions (LFs) different populations local Universe, providing a benchmark future surveys earlier cosmic epochs. Methods. The large statistics observations from SDSS DR7 sample MPA-JHU spectral...
We modelled dust grain-size distributions for carbonaceous and silicates dust, as well free-flying iron nanoparticles in the environment of a $\gamma$-ray burst (GRB) afterglow, GRB 180325A. This GRB, at $z=2.2486$, has an unambiguous detection 2175 \r{A} extinction feature with $R_V=4.58$ $A_V=1.58$. In addition to silicates, polycyclic aromatic hydrocarbons (PAH), graphite, we used first time model observed curve fit four permutations, using 232 sets carbon abundance hydrocarbon molecules...
The connection between quenching mechanisms, which rapidly turn star-forming systems into quiescent, and the properties of galaxy population remains difficult to discern. In this work we investigate physical MaNGA SAMI galaxies at different stages their star formation history. Specifically, compare with signatures recent (Quenched) -- $\rm H(α)$ in absorption low $D_n(4000)$ rest active (Retired Ageing, respectively). analysis is performed terms characteristics such as total stellar mass,...
We present a self-consistent prediction of the interstellar radiation field (ISRF), from extreme ultraviolet (EUV) to sub-mm range, based on two chemical evolution models Milky Way-like galaxy (MWG). To this end, we develop new tool called Mixclask include gas emission, absorption and scattering photoionization code Cloudy into Monte Carlo radiative transfer Skirt. Both algorithms are invoked iteratively, until physical properties ISM converge. have designed first test, reminiscent HII...
We study recent changes on the star formation history (SFH) of galaxies by means ageing diagram (AD), tracing fraction stars formed during last $\sim 20$ Myr through equivalent width H$α$ line and 1-3$ Gyr dust-corrected optical colour $(g-r)_0$ or Balmer break. provide a physical characterization using Pipe3D estimates SFH CALIFA MaNGA galaxies, in combination with predictions from IllustrisTNG-100. Our results show that AD may be divided into four domains correlate stellar mass fractions...
We modelled dust grain-size distributions for carbonaceous and silicates dust, as well free-flying iron nanoparticles in the environment of a $γ$-ray burst (GRB) afterglow, GRB 180325A. This GRB, at $z=2.2486$, has an unambiguous detection 2175 Å extinction feature with $R_V=4.58$ $A_V=1.58$. In addition to silicates, polycyclic aromatic hydrocarbons (PAH), graphite, we used first time model observed curve fit four permutations, using 232 sets carbon abundance hydrocarbon molecules ($b_C$),...