A5082582278- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Astrophysical Phenomena and Observations
- Gamma-ray bursts and supernovae
- Radio Astronomy Observations and Technology
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Scientific Research and Discoveries
- Astronomical Observations and Instrumentation
- Astrophysics and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Photocathodes and Microchannel Plates
- Seed Germination and Physiology
- Plant Genetic and Mutation Studies
- Advanced Proteomics Techniques and Applications
- Superconducting and THz Device Technology
- CCD and CMOS Imaging Sensors
- Calibration and Measurement Techniques
- Magnetic and Electromagnetic Effects
- Hydrocarbon exploration and reservoir analysis
- Advanced Fluorescence Microscopy Techniques
- Receptor Mechanisms and Signaling
- Remote Sensing in Agriculture
Tsinghua University
2023-2025
Centro de Estudios de Física del Cosmos de Aragón
2016-2022
Donostia International Physics Center
2022
University of Milano-Bicocca
2016
Abstract Supermassive black holes (SMBHs) are thought to originate from early universe seed of mass M BH ∼ 10 2 –10 5 ⊙ and grown through cosmic time. Such seeds could be powering the active galactic nuclei (AGN) found in today’s dwarf galaxies. However, probing a connection between local SMBHs has not yet been observationally possible. Massive hosted galaxies at intermediate redshifts, on other hand, may represent evolved counterparts formed very times. We present sample seven broad-line...
Abstract We present a study of seven spectroscopically confirmed (Ly α -emitting) galaxies at redshift z ≃ 6 using the JWST/NIRCam imaging data. These galaxies, with wide range Ly luminosities, were recently observed in series NIRCam broad and medium bands. constrain rest-frame UV/optical continua measure H line emission combination archival HST/WFC3 infrared photometry. further estimate escape fractions their photons ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"...
We analyse the outputs of cosmological ‘zoom-in’ hydrodynamical simulation ErisBH to study a strong stellar bar which naturally emerges in late evolution simulated Milky Way-type galaxy. focus on analysis formation and its effects galactic structure, gas distribution star formation. A large central region disc becomes unstable after z ∼ 1.4, but clear starts grow significantly only ≃ 0.4, possibly triggered by interaction with massive satellite. At 0.1, stabilizes reaches maximum radial...
J-PLUS is an ongoing 12-band photometric optical survey, observing thousands of square degrees the Northern hemisphere from dedicated JAST/T80 telescope at Observatorio Astrof\'isico de Javalambre. T80Cam a 2 sq.deg field-of-view camera mounted on this 83cm-diameter telescope, and equipped with unique system filters spanning entire range. This filter combination broad, medium narrow-band filters, optimally designed to extract rest-frame spectral features (the 3700-4000\AA\ Balmer break...
Pulsar Timing Array (PTA) experiments worldwide recently reported evidence of a nHz stochastic gravitational wave background (sGWB) compatible with the existence slowly inspiralling massive black hole (MBH) binaries (MBHBs). The shape signal contains valuable information about evolution z < 1 MBHs above 10 8 M ⊙ , suggesting faster dynamical MBHBs towards gravitational-wave-driven inspiral or larger MBH growth than usually assumed. In this work, we investigate if sGWB could also provide...
ABSTRACT We study the mass assembly and spin evolution of supermassive black holes (BHs) across cosmic time as well impact gravitational recoil on population nuclear wandering BHs (wBHs) by using semi-analytical model L-Galaxies run top Millennium merger trees. track changes that experience during both coalescence events gas accretion phases. For latter, we assume are coupled with bulge assembly. This assumption leads to predictions for median values z = 0 depend whether they hosted...
ABSTRACT We make use of $z\, {=}\, 0$ samples strongly barred and unbarred disc galaxies from the TNG100 TNG50 cosmological hydrodynamical simulations to assess performance simple instability criterion proposed by Efstathiou, Lake & Negroponte (1982) (ELN-criterion). find that generally assemble earlier, are more star dominated in their central regions, have massive compact discs than galaxies. The ELN-criterion successfully identifies ${\sim }\, 75$ 80{{ per\ cent}}$ galaxies,...
We study the genesis and evolution of super-massive black hole (SMBH) seeds through different formation channels, from PopIII remnants to massive seeds, modeled within L-Galaxies semi-analytic code. run model on Millennium-II simulation (MR-II) merger trees, as their halo-mass resolution (M_{vir,res}~10^7 Msun h^-1) allows in a cosmological volume (L_{box=100 Mpc atomic-cooling halos (T_{vir}>10^4 K) where intermediate-mass heavy are expected form. track these according spatial variations...
Stars can be ripped apart by tidal forces in the vicinity of a massive black hole (MBH), causing luminous flares known as disruption events (TDEs). These could contributing to mass growth intermediate-mass MBHs. New samples from transient surveys provide useful information on this unexplored channel. This work aims study demographics TDEs modeling coevolution MBHs and their galactic environments cosmological framework. We use semianalytic galaxy formation model L-Galaxies BH , which follows...
The observed Lyman-Alpha (Lya) line profile is a convolution of the complex Lya radiative transfer taking place in interstellar, circumgalactic and intergalactic medium (ISM, CGM, IGM, respectively). Discerning different components crucial order to use it as probe galaxy formation or evolution IGM. We present second version zELDA (redshift Estimator for Line profiles Distant emitters), an open-source Python module focused on modeling fitting profiles. This new focuses disentangling galactic...
The emergence of a large-scale stellar bar is one the most striking features in disc galaxies. By means state-of-the-art cosmological zoom-in simulations, we study formation and evolution bars Milky Way-like galaxies fully context, including physics gas dissipation, star formation, supernova feedback. Our goal to characterise actual trigger non-axisymmetric perturbation that leads strong observable simulations at z=0, discriminating between an internal/secular versus external/tidal origin....
ABSTRACT We study the cosmological build-up of pseudo-bulges using L-Galaxies semi-analytical model for galaxy formation with a new approach following separately assembly classical bulges and pseudo-bulges. Classical are assumed to be result violent processes (i.e. mergers starbursts), while is connected secular growth discs. apply both Millennium II simulations, in order our results across wide range stellar masses ($\rm 10^{7}\!-\!10^{11.5}\, {\rm M}_{\odot }$). find that z = 0 mainly...
Abstract We study a sample of 14 spectroscopically confirmed Ly α emitters (LAEs) in the late era reionization (at redshift z ≈ 6) based on JWST/NIRCam imaging data set. These LAEs with high luminosity L (Ly ) ∼10 42.4 –10 43.4 erg s −1 have been covered by (ongoing) COSMOS-Web survey over 0.28 deg 2 four NIRCam bands (F115W, F150W, F277W, and F444W). With imaging, we determine UV continua M ranging from −20.5 to −18.5 mag. The slopes median value β −2.35, steepest can reach < −3. Under...
The gravitational wave (GW) antenna LISA will detect the signal from coalescing massive black hole binaries (MBHBs) of 10 4 − 7 M ⊙ , providing clues as to their formation and growth throughout cosmic history. Some these events be localised with a precision several less than deg 2 enabling possible identification host galaxy. This work explores properties galaxies MBHBs below z ≲ 3. We generate simulated lightcone using semi-analytical model L-Galaxies applied merger trees high-resolution N...
Our goal is to morphologically classify the sources identified in images of J-PLUS early data release (EDR) into compact (stars) or extended (galaxies) using a suited Bayesian classifier. exhibit two distinct populations r-band magnitude vs. concentration plane, corresponding and sources. We modelled two-population distribution with skewed Gaussian for objects log-normal function ones. The derived model number density prior based on EDR were used estimate probability source be star galaxy....
Pulsar Timing Array (PTA) experiments worldwide recently reported evidence of a nHz stochastic gravitational wave background (sGWB) compatible with the existence slowly inspiralling massive black hole (MBH) binaries (MBHBs). The shape signal contains valuable information about evolution $z<1$ MBHs above $\rm 10^8 M_{\odot}$, suggesting faster dynamical MBHBs towards gravitational-wave-driven inspiral or larger MBH growth than usually assumed. In this work, we investigate if sGWB could also...
A population of non-stellar black holes ($\gtrsim$100 M$_{\odot}$) has been long predicted to wander the Milky Way. We aim characterize this by using L-Galaxies semi-analytical model applied on top high resolution Millennium-II merger trees. Our results predict $\sim$10 wandering with masses $\sim$2 $\times$ 10$^{3}$ M$_{\odot}$ in a typical $z$ = 0 Way galaxy, accounting for $\sim$2$\%$ total hole mass budget galaxy. find that locations these wanderers correlate their formation scenario....
ABSTRACT Being the most prominent H i line, Ly$\alpha$ permeates cosmic web in emission. Despite its potential as a cosmological probe, detection on large scales remains elusive. We present new methodology to perform intensity mapping with broad-band optical images, by cross-correlating them forest data using custom one-parameter estimator. also develop an analytical large-scale emission model two parameters (average luminosity $\langle L_{\rm Ly\alpha } \rangle$ and bias $b_{\rm e}$) that...
Stars can be ripped apart by tidal forces in the vicinity of a massive black hole, causing luminous flares classified as disruption events (TDEs). These could contributing to mass growth intermediate-mass holes, whilst new samples from ongoing transient surveys provide useful information on this unexplored channel. This work aims study demographics TDEs modeling co-evolution holes and their galactic environments cosmological framework. We use semi-analytic galaxy formation model L-Galaxies,...
We present the photometric determination of bright-end (L_Lya>10^43.5 erg/s) Lya luminosity function (LF) within four redshifts windows in interval 2.2<z<3.3. Our work is based on Javalambre Photometric Local Universe Survey (J-PLUS) first data-release, which provides multiple narrow-band measurements over ~1000 deg^2, with limiting magnitude r~22. The analysis high-z Lya-emitting sources such a wide area unprecedented, and allows to select total ~14,500 hyper-bright (L_Lya>10^43.3...
We study the genesis and evolution of super-massive black hole (SMBH) seeds through different formation channels, from PopIII remnants to massive seeds, modeled within L-Galaxies semi-analytic code. run model on Millennium-II simulation (MR-II) merger trees, as their halo-mass resolution (M_{vir,res}~10^7 Msun h^-1) allows in a cosmological volume (L_{box=100 Mpc atomic-cooling halos (T_{vir}>10^4 K) where intermediate-mass heavy are expected form. track these according spatial variations...
Context. The Ly α emission is an important tracer of neutral gas in a circum-galactic medium (CGM) around high- z quasi-stellar objects (QSOs). origin QSOs still under debate, bringing on significant implications for galaxy formation and evolution. Aims. In this paper, we study nebulae two high redshift QSOs, SDSS J141935.58+525710.7 at = 3.218 (hereafter QSO1) J141813.40+525240.4 3.287 QSO2), from the miniJPAS survey within All-wavelength Extended Groth Strip International Survey (AEGIS)...
Being the most prominent HI line, Ly$\alpha$ permeates cosmic web in emission. Despite its potential as a cosmological probe, detection on large scales remains elusive. We present new methodology to perform intensity mapping with broad-band optical images, by cross-correlating them forest data using custom one-parameter estimator. also develop an analytical large-scale emission model two parameters (average luminosity $\langle L_{\rm Ly\alpha} \rangle$ and bias $b_{\rm e}$) that respects...
ABSTRACT A population of non-stellar black holes (BHs) ($\gtrsim$100 M$_{\odot }$) has been long predicted to wander the Milky Way (MW). We aim characterize this by using L-Galaxies semi-analytical model applied on top high-resolution Millennium-II merger trees. Our results predict $\sim$10 wandering (WBHs) with masses $\sim$2 $\times$ 10$^{3}$ }$ in a typical z = 0 MW galaxy, accounting for $\sim 2~{{\ \rm per\ cent}}$ total BH mass budget galaxy. find that locations these wanderers...