A5042572711- Galaxies: Formation, Evolution, Phenomena
- Astrophysical Phenomena and Observations
- Astronomy and Astrophysical Research
- Gamma-ray bursts and supernovae
- Stellar, planetary, and galactic studies
- Pulsars and Gravitational Waves Research
- Relativity and Gravitational Theory
- Advanced Vision and Imaging
- Astrophysics and Star Formation Studies
- Calibration and Measurement Techniques
- Astronomical Observations and Instrumentation
- Astrophysics and Cosmic Phenomena
- Cosmology and Gravitation Theories
Donostia International Physics Center
2023-2024
Max Planck Institute for Astronomy
2021-2024
Heidelberg University
2019-2024
Pontificia Universidad Católica de Chile
2024
The PHANGS collaboration has been building a reference dataset for the multi-scale, multi-phase study of star formation and interstellar medium in nearby galaxies. With successful launch commissioning JWST, we can now obtain high-resolution infrared imaging to probe youngest stellar populations dust emission on scales clusters molecular clouds ($\sim$5-50 pc). In Cycle 1, is conducting an 8-band survey from 2-21$\mu$m 19 spiral CO(2-1) mapping, optical integral field spectroscopy, UV-optical...
Context . Massive black holes (MBHs) are typically hosted in the centres of massive galaxies but they appear to become rarer lower mass galaxies, where nuclear star clusters (NSCs) frequently instead. The transition region, both an MBH and NSC can co-exist, has been poorly studied date only a few dozen known host them. One avenue for detecting new with is look accretion signatures MBHs. Aims Here, we use SRG/eROSITA all-sky survey eRASS:4 data search X-ray accreting MBHs NSCs, while also...
ABSTRACT Nuclear star clusters (NSCs) are a common phenomenon in galaxy centres and found vast majority of galaxies intermediate stellar mass $\approx 10^9\, \mathrm{M}_{\odot }$. Recent investigations suggest that they rarely the least most massive nucleation fraction increases dense environments. It is unclear whether this trend holds true for field due to limited data currently available. Here we present our results on 601 Local Volume ($\lesssim {12}{\, \mathrm{Mpc}}$). Covering more...
Recent systematic searches for massive black holes (BHs) in local dwarf galaxies led to the discovery of a population faint Active Galactic Nuclei (AGN). We investigate agreement BH and AGN populations Illustris, TNG, Horizon-AGN, EAGLE, SIMBA simulations with current observational constraints low-mass galaxies. find that some these produce BHs are too massive, occupation fraction at z=0 is not inherited from simulation seeding modeling. The ability their host power an depends on galaxy...
We use high-resolution Hubble Space Telescope imaging data of dwarf galaxies in the Local Volume ($\lesssim 11$ Mpc) to parameterise 19 newly discovered nuclear star clusters (NSCs). Most have stellar masses $M_{\star}^{nsc} \lesssim 10^6$ M$_{\odot}$ and compare Galactic globular terms ellipticity, effective radius, mass, surface density. The are modelled with a S\'ersic profile their brightness evaluated at radius reveals tight positive correlation host galaxy mass. Our also indicate an...
We combine archival HST and new JWST imaging data, covering the ultraviolet to mid-infrared regime, morphologically analyze nuclear star cluster (NSC) of NGC 628, a grand-design spiral galaxy. The is located in 200 pc x 400 cavity, lacking both dust gas. find roughly constant values for effective radius (r_eff ~ 5 pc) ellipticity ({\epsilon} 0.05), while S\'ersic index (n) position angle (PA) drop from n 3 2 PA 130{\deg} 90{\deg}, respectively. In mid-infrared, r_eff 12pc, {\epsilon} 0.4,...
Context. This paper explores the theoretical relation between star clusters and black holes within them, focusing on potential role of nuclear (NSC S ), globular (GC ultra-compact dwarf galaxies (UCD ) as environments that allow for hole formation via stellar collisions. Aims. study aims to identify optimal conditions collisions across a range systems, leading very massive stars subsequently collapse into holes. We analyze data from numerical simulations observations diverse encompassing...
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...
Abstract We present new 0.3–21 μ m photometry of SN 2021aefx in the spiral galaxy NGC 1566 at +357 days after B -band maximum, including first detection any Type Ia supernova (SN Ia) >15 m. These observations follow earlier JWST +255 time maximum brightness, allowing us to probe temporal evolution emission properties. measure fraction flux emerging different wavelengths and its evolution. Additionally, integrated 0.3–14 decay rate Δ = 1.35 ± 0.05 mag/100 is higher than decline from...
This paper explores the theoretical relation between star clusters and black holes within, focusing on potential role of Nuclear Star Clusters (NSCs), Globular (GCs), Ultra Compact Dwarf Galaxies (UCDs) as environments that lead to hole formation through stellar collisions. The study aims identify optimal conditions for collisions in different systems leading very massive stars subsequently collapse into holes. Data from numerical simulations observations diverse are analyzed, encompassing...
Context. High redshift radio galaxies are among the most massive at their redshift, often found center of protoclusters galaxies, and expected to evolve into present day central cluster galaxies. Thus they a useful tool explore structure formation in young Universe. Aims. 3C~294 is powerful FR II type galaxy z = 1.786. Past studies have identified clumpy structure, possibly indicative merging system, as well tentative evidence that hosts dual active galactic nucleus (AGN). Due its proximity...