A5051405162- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Galaxies: Formation, Evolution, Phenomena
- Radio Astronomy Observations and Technology
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
- Solar and Space Plasma Dynamics
- Radio Wave Propagation Studies
- Impact of Light on Environment and Health
- Ionosphere and magnetosphere dynamics
Netherlands Institute for Radio Astronomy
2018-2024
Astronomical Observatory of Rome
2015-2016
University of California, Santa Barbara
2016
Sapienza University of Rome
2015-2016
We interpret recent ALMA observations of z > 6 normal star forming galaxies by means a semi-numerical method, which couples the output cosmological hydrodynamical simulation with chemical evolution model accounts for contribution to dust enrichment from supernovae, asymptotic giant branch stars and grain growth in interstellar medium. find that while stellar sources dominate mass small galaxies, higher level metal experienced Mstar 10^9 Msun allows efficient growth, provides dominant...
We attempt to interpret existing data on the evolution of UV luminosity function and colours, $\beta$, galaxies at $5 \leq z 8$, improve our understanding their dust content ISM properties. To this aim, we post-process results a cosmological hydrodynamical simulation with chemical model, which includes formation by supernovae intermediate mass stars, destruction in supernova shocks, grain growth accretion gas-phase elements dense gas. find that observations require steep, Small Magellanic...
Context. Apertif is a phased-array feed system for the Westerbork Synthesis Radio Telescope, providing forty instantaneous beams over 300 MHz of bandwidth. A dedicated survey program utilizing this upgrade started on 1 July 2019, with last observations taken 28 February 2022. The imaging component provides radio continuum, polarization, and spectral line data. Aims. Public release data critical maximizing legacy survey. Toward that end, we describe products from first year operations,...
The Empirical model for Solar Proton Events Real Time Alert (ESPERTA) exploits three solar parameters (flare longitude, soft X-ray fluence, and radio fluence) to provide a timely prediction the occurrence of proton events (SPEs, i.e., when >10MeV flux is ≥10 pfu) after emission ≥M2 flare. In addition, it makes most dangerous SPEs which >10 MeV ≥100 pfu. this paper, we study two different ways upgrade ESPERTA implement in real time: 1) by using ground based observations from LOFAR...
The first data release of Apertif survey contains 3074 radio continuum images covering a thousand square degrees the sky. observations were performed during August 2019 to July 2020. produced at central frequency 1355 MHz with bandwidth $\sim$150 and angular resolution reaching 10". In this work we introduce apply new method obtain primary beam model using machine learning approach, Gaussian process regression. models obtained are published along products for release. We images, mosaic them...
ABSTRACT Radio spectroscopy provides a unique inspection perspective for solar and space weather research, which can reveal the plasma energetic electron information in corona inner heliosphere. However, radio-frequency interference (RFI) from human activities affects sensitive radio telescopes, significantly quality of observation. Thus, RFI detection mitigation observations is necessary to obtain high science-ready data. The flagging particularly challenging at low frequency, because...
Star-forming galaxies at high redshift show anomalous values of infrared excess, which can be described only by extremizing the existing relations between shape their ultraviolet continuum emission and infrared-to-ultraviolet luminosity ratio, or constructing \textit{ad-hoc} models star formation dust distribution. We present an alternative explanation, based on unveiled AGN activity, to existence such galaxies. In fact, presence a weak configures as natural scenario in order explain...