334 citations · 3.4k across the 83 of their papers we have counts for
30 papers · 1 filter
Discovery of sulfur oxides in the ejecta of a B[e] supergiant
C. Bordiu, J. Ricardo Rizzo, D. Navarro-Almaida +12
B[e] supergiants represent a rare class of luminous, evolved massive stars surrounded by dusty circumstellar disks. Since their intense UV fields were long thought to sterilize the…
Coherent and Incoherent Emission from the Ordered Magnetospheres of Low-Mass Stars, UCDs, and Massive Stars
Francesco Cavallaro, Paolo Leto, Barnali Das +15
Massive early-type (B/A) stars and ultracool dwarfs (UCDs) represent two distinct regimes in which ordered, large-scale magnetospheres are observed. In rapidly rotating massive sta…
The distance to CRL 618 through its radio expansion parallax
L. Cerrigone, G. Umana, C. Trigilio +9
CRL 618 is a post-AGB star that has started to ionize its ejecta. Its central HII region has been observed over the last 40 years and has steadily increased in flux density at radi…
The rich molecular environment of the luminous blue variable star AFGL 2298
J. R. Rizzo, C. Bordiu, C. Buemi +6
We investigated the molecular environment of AFGL 2298, an obscured Galactic Luminous blue variable (LBV) star which hosts a highly structured circumstellar environment with hints…
Discovery and origin of the radio emission from the multiple stellar system KQVel
P. Leto, L. M. Oskinova, C. S. Buemi +20
KQVel is a binary system composed of a slowly rotating magnetic Ap star with a companion of unknown nature. In this paper, we report the detection of its radio emission. We conduct…
A scaling relationship for non-thermal radio emission from ordered magnetospheres: from the top of the Main Sequence to planets
P. Leto, C. Trigilio, J. Krticka +20
In this paper, we present the analysis of incoherent non-thermal radio emission from a sample of hot magnetic stars, ranging from early-B to early-A spectral type. Spanning a wide…
The auroral radio emission of the magnetic B-type star rho OphC
P. Leto, C. Trigilio, C. S. Buemi +19
The non-thermal radio emission of main-sequence early-type stars is a signature of stellar magnetism. We present multi-wavelength (1.6-16.7 GHz) ATCA measurements of the early-type…
Evidence for radio and X-ray auroral emissions from the magnetic B-type star rho Oph A
P. Leto, C. Trigilio, F. Leone +20
We present new ATCA multi-wavelength radio measurements (range 2.1-21.2 GHz) of the early-type magnetic star rho Oph A, performed in March 2019 during 3 different observing session…
Study of the Galactic radio sources in the SCORPIO survey resolved by ATCA at 2.1 GHz
A. Ingallinera, G. Umana, C. Trigilio +10
We present a catalogue of a large sample of extended radio sources in the SCORPIO field, observed and resolved by the Australia Telescope Compact Array. SCORPIO, a pathfinder proje…
A massive nebula around the Luminous Blue Variable star RMC143 revealed by ALMA
Claudia Agliozzo, Andrea Mehner, Neil Matthew Phillips +11
The luminous blue variable (LBV) RMC143 is located in the outskirts of the 30~Doradus complex, a region rich with interstellar material and hot luminous stars. We report the s…
The polarization mode of the auroral radio emission from the early-type star HD142301
P. Leto, C. Trigilio, L. M. Oskinova +12
We report the detection of the auroral radio emission from the early-type magnetic star HD142301. New VLA observations of HD142301 detected highly polarized amplified emission occu…
A combined multiwavelength VLA/ALMA/Chandra study unveils the complex magnetosphere of the B-type star HR5907
P. Leto, C. Trigilio, L. M. Oskinova +9
We present new radio/millimeter measurements of the hot magnetic star HR5907 obtained with the VLA and ALMA interferometers. We find that HR5907 is the most radio luminous early ty…
The Luminous Blue Variable RMC127 as seen with ALMA and ATCA
C. Agliozzo, C. Trigilio, G. Pignata +12
We present ALMA and ATCA observations of the luminous blue variable \rmc. The radio maps show for the first time the core of the nebula and evidence that the nebula is strongly asy…
Radio variability and non-thermal components in stars evolving toward planetary nebulae
L. Cerrigone, G. Umana, C. Trigilio +3
We present new JVLA multi-frequency measurements of a set of stars in transition from the post-AGB to the Planetary Nebula phase monitored in the radio range over several years. Cl…
The detection of variable radio emission from the fast rotating magnetic hot B-star HR7355 and evidence for its X-ray aurorae
P. Leto, C. Trigilio, L. Oskinova +6
In this paper we investigate the multiwavelengths properties of the magnetic early B-type star HR7355. We present its radio light curves at several frequencies, taken with the Jans…
New ATCA, ALMA and VISIR observations of the candidate LBV SK-67266 (S61): the nebular mass from modelling 3D density distributions
C. Agliozzo, R. Nikutta, G. Pignata +10
We present new observations of the nebula around the Magellanic candidate Luminous Blue Variable S61. These comprise high-resolution data acquired with the Australia Telescope Comp…
Exploring the multifaceted circumstellar environment of the Luminous Blue Variable HR Carinae
C. S. Buemi, C. Trigilio, P. Leto +9
We present a multi-wavelength study of the Galactic Luminous Blue Variable HR Carinae, based on new high resolution mid-infrared (IR) and radio images obtained with the Very Large…
Probing the magnetosphere of the M8.5 dwarf TVLM513-46546 by modelling its auroral radio emission. Hint of star exoplanet interaction?
P. Leto, C. Trigilio, C. S. Buemi +3
In this paper we simulate the cyclic circularly-polarised pulses of the ultra-cool dwarf TVLM513-46546, observed with the VLA at 4.88 and 8.44 GHz on May 2006, by using a 3D model…
3D-modelling of the stellar auroral radio emission
P. Leto, C. Trigilio, C. S. Buemi +3
The electron cyclotron maser is the coherent emission process that gives rise to the radio lighthouse effect observed in the hot magnetic chemically peculiar star CU Virginis. It h…
Searching for OH maser emission towards the MIPSGAL compact Galactic bubbles
A. Ingallinera, C. Trigilio, P. Leto +4
We conducted radio observations searching for OH 18-cm maser emission from a sample of 169 unclassified MIPSGAL compact Galactic bubbles. These sources are thought to be the circum…
SCORPIO: A deep survey of Radio Emission from the stellar life-cycle
G. Umana, C. Trigilio, T. M. O. Franzen +7
Radio emission has been detected in a broad variety of stellar objects from all stages of stellar evolution. However, most of our knowledge originates from targeted observations of…
Spitzer observations of a circumstellar nebula around the candidate Luminous Blue Variable MWC 930
L. Cerrigone, G. Umana, C. S. Buemi +4
MWC 930 is a star just ~2° above the Galactic plane whose nature is not clear and that has not been studied in detail so far. While a post-Asymptotic Giant Branch (AGB) classificat…
Radio detection of nebulae around four LBV stars in the LMC
Claudia Agliozzo, Grazia Umana, Corrado Trigilio +5
The nebulae associated to four Luminous Blue Variables (LBVs) in the Large Magellanic Cloud (LMC) have been observed at 5.5 and 9 GHz using the Australia Telescope Compact Array, a…
Searching for CU Vir-type cyclotron maser from σOri E: The role of the magnetic quadrupole component
P. Leto, C. Trigilio, C. S. Buemi +2
In this paper we present new and archive radio measurements obtained with the Very Large Array of the magnetic chemically peculiar (MCP) star σOri E. The radio data have been obtai…