A5047391289- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Solid State Laser Technologies
- Spectroscopy and Chemometric Analyses
- Scientific Research and Discoveries
- Remote Sensing in Agriculture
- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Gamma-ray bursts and supernovae
Instituto de Astrofísica de Canarias
2020-2024
Universidad de La Laguna
2020-2024
Shanghai Astronomical Observatory
2024
Context. Recent integral-field spectroscopy observations of edge-on galaxies have led to significant progress in our knowledge the ages and chemical compositions thick disks. However, origin disks their evolutionary connection with thin is still a matter debate. Aims. We provide new insights into this topic by connecting stellar populations at redshift z = 0 past formation growth 24 Milky Way-mass from AURIGA zoom-in cosmological simulations. assess role played mergers satellite mass...
ABSTRACT Quantifying the contribution of mergers to stellar mass galaxies is key for constraining mechanisms galaxy assembly across cosmic time. However, mapping between observable properties and merger histories not trivial: cosmological simulations are only tools we have calibration. We study robustness a simulation-based inference ex situ fraction nearby different observables – integrated spatially resolved formation models IllustrisTNG EAGLE with machine learning. find that at fixed...
ABSTRACT The merger history of a galaxy is thought to be one the major factors determining its internal dynamics, with galaxies having undergone different types or mergers (e.g. dry, minor, mergers) predicted show dynamical properties. We study instantaneous orbital distribution in eagle simulation, colouring orbits stellar particles by their age, order understand whether stars form particular thin thick disc). first that reproduces well observed mass fractions families as function and spin...
We have learnt in the last decades that majority of galaxies belong to high density regions interconnected a sponge-like fashion. This large-scale structure is characterised by clusters, filaments, and walls, where most concentrate, but also under-dense called voids. The void within represent an ideal place for study galaxy formation evolution, as they are largely unaffected complex physical processes transform high-density environments. may hold key answer current challenges Lambda CDM...
We have developed a new tool to analyse galaxies in the EAGLE simulations as close possible observations.We investigated evolution of their kinematic properties by means angular momentum proxy parameter,$ \lambda_{Re} $for with $M_{*} \ge 5 \times 10^{9} M_{\odot}$ RefL0100N1504 simulation up redshift two (z = 2). Galaxies show wide variety features, similiar those found integral-field spectroscopic studies. At z=0 distribution ${\lambda}_{Re}-{\epsilon}$ plane is also good agreement results...
Yttria–alumina–silica (YAS) glass microspheres doped with Nd3+ ions were excited a 532 nm continuous laser in order to study the dependency of wavelength whispering gallery mode (WGM) peaks on temperature sample. This was possible due previous calibration 808 and 890 emission bands Nd:YAS sample for different temperatures using fluorescence intensity ratio (FIR) technique. A maximum sensitivity 15 × 10−6 K−1 resolution limit 0.2 K obtained microsphere sensor. Moreover, at 1064 observed by...
The connection between the Stellar Velocity Ellipsoid (SVE) and dynamical evolution of galaxies has been a matter debate in last years there is no clear consensus whether different heating agents (e.g. spiral arms, giant molecular clouds, bars mergers) leave detectable signatures present day kinematics. Most these results are based on single global SVE have not taken into account that do necessarily equally affect all regions stellar disc.We study 2D spatial distribution across discs Auriga...
We have learnt in the last decades that majority of galaxies belong to high density regions interconnected a sponge-like fashion. This large-scale structure is characterised by clusters, filaments, walls, where most concentrate, but also under-dense regions, called voids. The void and within represent an ideal place for study galaxy formation evolution as they are largely unaffected complex physical processes transform high-density environments. These can hold key well answer current...
Galaxies grow through star formation (in-situ) and accretion (ex-situ) of other galaxies. Reconstructing the relative contribution these two growth channels is crucial for constraining processes galaxy in a cosmological context. In this on-going work, we utilize conditional variational autoencoder along with normalizing flow - trained on state-of-the-art simulation an attempt to infer posterior distribution 2D ex-situ stellar mass galaxies solely from observable two-dimensional maps their...
Theoretical works have shown that off-plane motions of bars can heat stars in the vertical direction during buckling but is not clear how do they affect rest components Stellar Velocity Ellipsoid (SVE). We study 2D spatial distribution vertical, $\sigma_{z}$, azimuthal, $\sigma_{\phi}$ and radial, $\sigma_{r}$ velocity dispersions inner regions Auriga galaxies, a set high-resolution magneto-hydrodynamical cosmological zoom-in simulations, to unveil influence bar on stellar kinematics....
Recent integral-field spectroscopy observations have revealed that thick- and thin-disk star-formation histories are regulated by the interplay of internal external processes. We analyze stellar-population properties 24 spiral galaxies from AURIGA zoom-in cosmological simulations, to offer a more in-depth interpretation observable properties. present edge-on maps stellar age, metallicity [Mg/Fe] abundance, we extract chemical-evolution thin thick disks. Both show signs between chemical...
Quantifying the contribution of mergers to stellar mass galaxies is key for constraining mechanisms galaxy assembly across cosmic time. However, mapping between observable properties and merger histories not trivial: cosmological simulations are only tools we have calibration. We study robustness a simulation-based inference ex-situ fraction nearby different observables -- integrated spatially-resolved formation models IllustrisTNG EAGLE with Machine Learning. find that at fixed simulation,...
The origin of thick disks and their evolutionary connection with thin are still a matter debate. We provide new insights into this topic by connecting the stellar populations at redshift $z=0$ past formation growth, in 24 Milky Way-mass galaxies from AURIGA zoom-in cosmological simulations. projected each galaxy edge on, decomposed it morphologically two disk components, order to define geometrically as usually done observations. produced age, metallicity [Mg/Fe] edge-on maps. quantified...
Abstract Recent integral-field spectroscopy observations have revealed that thick- and thin-disk star-formation histories are regulated by the interplay of internal external processes. We analyze stellar-population properties 24 spiral galaxies from AURIGA zoom-in cosmological simulations, to offer a more in-depth interpretation observable properties. present edge-on maps stellar age, metallicity [Mg/Fe] abundance, we extract chemical-evolution thin thick disks. Both show signs between...