J. R. Rizzo

Discovery of sulfur oxides in the ejecta of a B[e] supergiant

C. Bordiu, J. R. Rizzo, D. Navarro-Almaida, A. Fuente et autres

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 their surroundings, molecular detections beyond carbon monoxide have remained elusive, leaving their chemical reservoirs largely unexplored. …

Discovery of Sulfur Oxides in the Ejecta of a B[e] Supergiant

Cristóbal Bordiú, J. R. Rizzo, D. Navarro-Almaida, A. Fuente et autres

Abstract 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 their surroundings, molecular detections beyond carbon monoxide have remained elusive, leaving their chemical reservoirs largely …

es, it, cl (code pays fourni par la source)

Molecular gas in AFGL 2298

J. R. Rizzo, Bordiu C., Buemi C., Leto P. et autres

A Semi-supervised “Cluster-then-Label” Scheme for Photometric Classification of Evolved Stars

Cristóbal Bordiú, F. Bufano, J. R. Rizzo, Thomas Cecconello et autres

it, es (code pays fourni par la source)

Millimetre continuum from luminous blue variable stars and their environs

J. R. Rizzo, Cristóbal Bordiú, A. Ritacco

Context. Luminous blue variables (LBVs) represent a brief transitional phase in the evolution of massive stars. Multi-wavelength studies of their circumstellar environments are essential to quantify their feedback at Galactic scales. Dominant emission mechanisms at millimetre wavelengths are, however, still poorly understood. …

es, it, fr (code pays fourni par la source)

MeerKAT discovery of 164 compact radio rings towards the Galactic plane

Cristóbal Bordiú, F. Bufano, G. Umana, J. R. Rizzo et autres

ABSTRACT We report the discovery of 164 compact (radius < 1 arcmin) radio rings using MeerKAT 1.3 GHz data from the SARAO (South African Radio Astronomy Observatory) MeerKAT Galactic Plane Survey ($l=2^{\circ } \!-\! 60^{\circ }, 252^{\circ } \!-\! 358^{\circ }$, $|b|\le …

it, es, au, cl, Afrique du Sud (code pays fourni par la source)

Millimetre continuum from LBV stars and their environs. NIKA2 observations and Virtual Observatory data

J. R. Rizzo, Cristóbal Bordiú, A. Ritacco

Multi-wavelength studies of their circumstellar environments around LBVs are essential to quantify their feedback at Galactic scales. Dominant emission mechanisms at millimetre wavelengths are, however, still poorly understood. Stellar winds, circumstellar dust, and ionised gas have not been explored together in the …

fr (code pays fourni par la source)

Using virtual reality to enhance mobility, safety, and equity for persons with vision loss in urban environments

Fabiana Sofia Ricci, Charles K Ukegbu, Anne Krassner, Sanjukta Hazarika et autres

This study explores the use of virtual reality (VR) as an innovative tool to enhance awareness, acceptance, and understanding of accessibility for persons with vision loss (VL). Through a VR-based workshop developed in collaboration with New York City's Department Of Transportation, participants …

MeerKAT reveals a ghostly thermal radio ring towards the Galactic Centre

Cristóbal Bordiú, M. D. Filipović, G. Umana, W. D. Cotton et autres

We present the serendipitous discovery of a new radio-continuum ring-like object nicknamed Kýklos (J1802–3353), with MeerKAT UHF and L-band observations. The radio ring, which resembles the recently discovered odd radio circles (ORCs), has a diameter of ∼80″ and is located just ∼6° …

it, au, us, Afrique du Sud, cl, rs, se, ie, es (code pays fourni par la source)

The rich molecular environment of the luminous blue variable star AFGL 2298

J. R. Rizzo, Cristóbal Bordiú, C. S. Buemi, P. Leto et autres

Context. Luminous blue variable (LBV) stars represent a short-lived stage in the late evolution of the most massive stars. Highly unstable, LBVs exhibit dense stellar winds and episodic eruptions that produce complex circumstellar nebulae, the study of which is crucial for properly …

es, it, cl (code pays fourni par la source)

Main Sequence to Starburst Transitioning Galaxies: Gamma-Ray Burst Hosts at z ∼ 2

Jakub Nadolny, M. J. Michałowski, J. R. Rizzo, A. Karska et autres

Abstract Star-forming galaxies populate a main sequence (MS), a well-defined relation between stellar mass (M *) and star formation rate (SFR). Starburst (SB) galaxies lie significantly above the relation, whereas quenched galaxies lie below the sequence. In order to study the evolution …

pl, es, de, dk, se, it (code pays fourni par la source)

The rich molecular environment of the luminous blue variable star AFGL 2298

J. R. Rizzo, Cristóbal Bordiú, C. S. Buemi, P. Leto et autres

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 of multiple mass-loss events in the last few $10^4$ a. We present spectral line observations of AFGL …

es, it, cl (code pays fourni par la source)