Publications (28)
Neutral pion emission from accelerated protons in the supernova remnant W44
A. Giuliani, M. Cardillo, M. Tavani +41
We present the AGILE gamma-ray observations in the energy range 50 MeV - 10 GeV of the supernova remnant (SNR) W44, one of the most interesting systems for studying cosmic-ray prod…
G51.04+0.07 and its environment: Identification of a new Galactic supernova remnant at low radio frequencies
L. Supán, G. Castelletti, W. M. Peters +1
We have identified a new supernova remnant (SNR), G51.04+0.07 (G51.04), using observations at 74 MHz from the VLA Low-Frequency Sky Survey Redux. Earlier, higher frequency radio co…
Radio and X-ray properties of the source G29.37+0.1 linked to HESS J1844-030
G. Castelletti, L. Supan, A. Petriella +2
Using observations carried out with the GMRT, we performed high-quality full-synthesis imaging at 610 MHz of the source G29.37+0.1, which is an as-yet-unclassified object linked to…
Morphological properties of the Crab Nebula: a detailed multiwavelength study based on new VLA, HST, Chandra and XMM-Newton images
G. Dubner, G. Castelletti, O. Kargaltsev +3
We present a detailed analysis of the morphological properties of the Crab Nebula across the electromagnetic spectrum based on new and previous high-quality data from radio to X-ra…
Unlocking the radio-gamma spectrum of the pulsar wind nebula around PSR J1124-5916 in SNR G292.0+1.8
A. Lemière, G. Castelletti, N. L. Maza
We present the first detection of GeV -ray emission potentially associated with the pulsar wind nebula (PWN) hosted by the young core-collapse supernova remnant G292.0+1.8, bas…
New X-ray observations toward PSR J1826-1256
L. Duvidovich, E. Giacani, G. Castelletti +2
We present the results of XMM-Newton observations toward the pulsar PSR J18261256, which lies at 5.4 from the centroid of the TeV source HESS J1826130. These data…
High-resolution radio study of SNR IC443 at low radio frequencies
G. Castelletti, G. Dubner, T. Clarke +1
We investigated in detail the morphology at low radio frequencies of the supernova remnant IC443 and accurately established its radio continuum spectral properties. We used the VLA…
First high-resolution radio study of the Supernova Remnant G338.3-0.0 associated with the gamma-ray source HESS J1640-465
G. Castelletti, E. Giacani, G. Dubner +3
We report on a multifrequency radio study of the supernova remnant (SNR) G338.3-0.0, in positional coincidence with the TeV source HESS J1640-465. To carry out this research we obs…
Feature-tailored spectroscopic analysis of the SNR Puppis A in X-rays
G. J. M. Luna, M. J. S. Smith, G. Dubner +2
We introduce a distinct method to perform spatially-resolved spectral analysis of astronomical sources with highly structured X-ray emission. The method measures the surface bright…
A multiwavelength study of the star forming region IRAS 18544+0112
M. E. Ortega, S. Paron, S. Cichowolski +3
This work aims at investigating the molecular and infrared components in the massive young stellar object (MYSO) candidate IRAS 18544+0112. The purpose is to determine the nature a…
Aspect angle for interstellar magnetic field in SN 1006
O. Petruk, G. Dubner, G. Castelletti +6
A number of important processes taking place around strong shocks in supernova remnants (SNRs) depend on the shock obliquity. The measured synchrotron flux is a function of the asp…
New VLA observations of the SNR Puppis A: the radio properties and the correlatoin withe the X-ray emission
G. Castelletti, G. Dubner, K. Golap +1
In this paper we report on a new study of the SNR Puppis A based on VLA observations at 1425 MHz; the improvement represents a factor of two in angular resolution and almost ten ti…
A multi-frequency study of the spectral index distribution in the SNR CTB 80
G. Castelletti, G. Dubner
We have conducted a study at radio wavelengths of the spectral behaviour of the supernova remnant (SNR) CTB 80. Based on an homogenised data set of integrated flux densities, we ca…
Supernova remnant G46.8-0.3, a new case of interaction with molecular material
L. Supan, G. Fischetto, G. Castelletti
We present the first detailed study on the Galactic supernova remnant (SNR) G46.8-0.3 and its environment since its discovery more than 50 years ago. With new flux measurements fro…
The environment of the gamma-ray emitting SNR G338.3-0.0: a hadronic interpretation for HESS J1640-465
L. Supan, A. D. Supanitsky, G. Castelletti
The supernova remnant (SNR) G338.3-0.0 spatially correlates with HESS J1640-465, which is considered the most luminous gamma-ray source associated with a SNR in our Galaxy. The X-r…
Predicted gamma-ray image of SN 1006 due to inverse Compton emission
O. Petruk, F. Bocchino, M. Miceli +5
We propose a method to synthesize the inverse Compton (IC) gamma-ray image of a supernova remnant starting from the radio (or hard X-ray) map and using results of the spatially res…
A complete radio study of SNR G15.4+0.1 from new GMRT observations
L. Supan, G. Castelletti, B. C. Joshi +2
The supernova remnant G15.4+0.1 is considered to be the possible counterpart of the gamma-ray source HESSJ1818-154. With the goal of getting a complete view of this remnant and und…
The most complete and detailed X-ray view of the SNR Puppis A
G. Dubner, N. Loiseau, P. Rodriguez-Pascual +3
With the purpose of producing the first detailed full view of Puppis A in X-rays, we carried out new XMM-Newton observations covering the missing regions in the southern half of th…
One size fits all: Insights on Extrinsic Thermal Absorption from Similarity of Supernova Remnant Radio Continuum Spectra
M. G. Abadi, G. Castelletti, L. Supan +2
Typically, integrated radio frequency continuum spectra of supernova remnants (SNRs) exhibit a power-law form due to their synchrotron emission. In numerous cases, these spectra sh…
Radio and X-ray study of two multi-shell Supernova Remnants: Kes79 and G352.7-0.1
E. Giacani, M. J. S. Smith, G. Dubner +3
We investigate two multi-shell galactic supernova remnants (SNRs), Kes79 and G352.7-0.1, to understand the causes of such morphology. The research was carried out based on new and…
A new study towards PSR J1826-1334 and PSR J1826-1256 in the region of HESS J1825-137 and HESS J1826-130
L. Duvidovich, E. Giacani, G. Castelletti +2
Aims. The goal of this paper is to detect synchrotron emission from the relic electrons of the crushed pulsar wind nebula (PWN) HESS J1825-137 and to investigate the origin of the…
Thermal radio absorption as a tracer of the interaction of SNRs with their environments
G. Castelletti, L. Supan, W. M. Peters +1
We present new images and continuum spectral analysis for 14 resolved Galactic SNRs selected from the 74 MHz Very Large Array Low-Frequency Sky Survey Redux (VLSSr). We combine new…
A hadronic scenario for HESS J1818-154
G. Castelletti, L. Supan, G. Dubner +2
Aims: G15.4+0.1 is a faint supernova remnant (SNR) that has recently been associated with the gamma-ray source HESS J1818-154. We investigate a hadronic scenario for the production…
The Supernova Remnant W44: confirmations and challenges for cosmic-ray acceleration
M. Cardillo, M. Tavani, A. Giuliani +6
The middle-aged supernova remnant (SNR) W44 has recently attracted attention because of its relevance regarding the origin of Galactic cosmic-rays. The gamma-ray missions AGILE and…
Supernova remnants in the new radio astronomy era
A. Ingallinera, M. Arias, G. Castelletti +25
Supernova remnants (SNRs) are what is left after stellar explosions, when the stellar ejecta, the explosion shock and the circumstellar medium interact. Despite being among the fir…
Thermal emission, shock modification, and X-ray emitting ejecta in SN 1006
M. Miceli, F. Bocchino, D. Iakubovskyi +6
Efficient particle acceleration can modify the structure of supernova remnants. In this context we present the results of the combined analysis of the XMM-Newton EPIC archive obser…
Unveiling the origin of HESS J1809-193
G. Castelletti, E. Giacani, A. Petriella
The main goal of this paper is to provide new insights on the origin of the observable flux of gamma rays from HESS J1809-193 using new high-quality observations in the radio domai…
The low frequency radio emission and spectrum of the extended SNR W44: new VLA observations at 74 and 324 MHz
G. Castelletti, G. Dubner, C. Brogan +1
We present new Very Large Array (VLA) radio images at 74 and 324 MHz of the SNR W44. The VLA images, obtained with unprecedented angular resolution and sensitivity for such low fre…