A5101888932- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Astrophysical Phenomena and Observations
- Astrophysics and Star Formation Studies
- Astro and Planetary Science
- Photocathodes and Microchannel Plates
- Statistics Education and Methodologies
- Astrophysics and Cosmic Phenomena
- Scientific Research and Discoveries
- Gamma-ray bursts and supernovae
- CCD and CMOS Imaging Sensors
- demographic modeling and climate adaptation
- Particle Detector Development and Performance
- Spectroscopy and Laser Applications
National Observatory of Athens
2022-2024
University of Southampton
2022-2024
Instituto de Astrofísica de Andalucía
2021
Universidad de Granada
2021
The CARMENES exoplanet survey of M dwarfs has obtained more than 18 000 spectra 329 nearby over the past five years as part its guaranteed time observations (GTO) program. We determine planet occurrence rates with 71 stars from GTO program for which we have 50 observations. use injection-and-retrieval experiments on radial-velocity (RV) series to measure detection probabilities. include 27 planets in 21 planetary systems our analysis. find 0.06+0.04-0.03 giant (100 M_Earth < M_pl sin i 1000...
We report the discovery of two planetary systems, namely G 264-012, an M4.0 dwarf with terrestrial planets ($M_{\rm b}\sin{i} = 2.50^{+0.29}_{-0.30}$ M$_{\oplus}$ and $M_{\rm c}\sin{i} 3.75^{+0.48}_{-0.47}$ M$_{\oplus}$), Gl 393, a bright M2.0 one planet 1.71 \pm 0.24$ M$_{\oplus}$). Although both stars were proposed to belong young stellar kinematic groups, we estimate their ages be older than about 700 Ma. The around 264-012 discovered using only radial-velocity (RV) data from CARMENES...
ABSTRACT In a hierarchical, dark matter-dominated Universe, stellar mass functions (SMFs), galaxy merger rates, star formation histories (SFHs), satellite abundances, and intracluster light (ICL), should all be intimately connected observables. However, the systematics affecting observations still prevent universal uniform measurements of, for example, SMF SFHs, inevitably preventing theoretical models to compare with multiple data sets robustly simultaneously. We here present our holistic...
The spectral energy distribution (SED) of low-luminosity active galactic nuclei (LLAGN) presents unique challenges as the emission from these objects is comparable to radiation their host galaxy and accretion physics involved particularly complex. This study introduces a novel CIGALE module specifically designed address challenges. combines empirical $L_ X $--$L_ m $ relationship with physically motivated models, such advection-dominated flows (ADAFs) truncated disks, providing more accurate...
The spectral energy distribution (SED) of low-luminosity active galactic nuclei (LLAGN) presents unique challenges due to their comparable radiation output host galaxies and complex accretion dynamics. We introduce a novel module within the CIGALE framework specifically designed for SED fitting LLAGN, incorporating both empirical relationships like $L_\mathrm{X}$--$L_\mathrm{12\mu m}$ physically-based models such as advection-dominated flows (ADAFs) truncated disks. This allows more accurate...
This paper explores the role of small-scale environment ($<1$ Mpc) in modulating accretion events onto supermassive black holes by studying incidence Active Galactic Nuclei (AGN) massive clusters galaxies. A flexible, data-driven semi-empirical model is developed based on a minimal set parameters and under zero order assumption that AGN galaxies independent environment. used to predict how fraction X-ray selected among dark matter halos ($\gtrsim 3\times 10^{14}\,M_{\odot}$) evolves with...
Evolutionary models suggest that the initial growth phases of active galactic nuclei (AGN) are dust-enshrouded, and characterised by jet/wind outflows should gradually clear interstellar medium (ISM) in host heating and/or expelling surrounding gas. eFEDSJ091157.4$+$014327 (z$\sim$0.6) was selected from X-ray samples for its characteristics similar to sources with which include red, obscured luminous. We aim explore environment around this red quasar characterise kinematics within system....
Environmental effects are believed to play an important yet poorly understood role in triggering accretion events onto the supermassive black holes (SMBHs) of galaxies (Active Galactic Nuclei; AGN). Massive clusters, which represent densest structures Universe, provide excellent laboratory isolate environmental and study their impact on hole growth. In this work, we critically review observational evidence for preferential activation SMBHs outskirts galaxy clusters. We develop a...
Context. Evolutionary models suggest that the initial growth phases of active galactic nuclei (AGN) and their central supermassive black holes (SMBHs) are dust-enshrouded characterised by jet or wind outflows should gradually clear interstellar medium (ISM) in host heating and/or expelling surrounding gas. eFEDSJ091157.4+014327 ( z ∼ 0.6) was selected from X-ray samples eROSITA (extended ROentgen Survey with an Imaging Telescope Array) for its characteristics: red colours, obscuration N H =...
ABSTRACT Environmental effects are believed to play an important yet poorly understood role in triggering accretion events onto the supermassive black holes (SMBHs) of galaxies (active galactic nuclei; AGNs). Massive clusters, which represent densest structures Universe, provide excellent laboratory isolate environmental and study their impact on hole growth. In this work, we critically review observational evidence for preferential activation SMBHs outskirts galaxy clusters. We develop a...
In a hierarchical, dark matter-dominated Universe, stellar mass functions (SMFs), galaxy merger rates, star formation histories (SFHs), satellite abundances, and intracluster light, should all be intimately connected observables. However, the systematics affecting observations still prevent universal uniform measurements of, for example, SMF SFHs, inevitably preventing theoretical models to compare with multiple data sets robustly simultaneously. We here present our holistic semi-empirical...
This paper explores the role of small-scale environment ($<1$ Mpc) in modulating accretion events onto supermassive black holes by studying incidence Active Galactic Nuclei (AGN) massive clusters galaxies. A flexible, data-driven semi-empirical model is developed based on a minimal set parameters and under zero order assumption that AGN galaxies independent environment. used to predict how fraction X-ray selected among dark matter halos ($\gtrsim 3\times 10^{14}\,M_{\odot}$) evolves with...