Mario Cadelano

The first MeerKAT S-band globular cluster pulsar survey

Rouhin Nag, M. Burgay, A. Ridolfi, Federico Abbate et autres

Globular clusters are efficient factories of recycled pulsars, but searches towards high dispersion-measure (DM) clusters can be strongly limited around 1,GHz---which is where most pulsar surveys are typically conducted---due to dispersive smearing and interstellar scattering. Observations at higher radio frequencies provide a …

The youngest white dwarf companion to a millisecond pulsar: Insights from NGC 362D

Greta Ettorre, Emanuele Dalessandro, Mario Cadelano, A. Ridolfi et autres

We report on the identification of the optical counterpart to the recently discovered millisecond pulsar (MSP) NGC362D in the Galactic globular cluster NGC 362 based on deep, multi-band, and multi-epoch Space Telescope observations. Our analysis robustly shows that this object is a …

Exploring the optical properties of redback pulsars: The case of J1717+4308A in the globular cluster M92

Jianxing Chen, Greta Ettorre, Cristina Pallanca, Mario Cadelano et autres

Binary millisecond pulsars (MSPs) in globular clusters (GCs) are key for binary and stellar evolution studies under extreme conditions. The identification of their optical companion stars is instrumental in order to characterise these systems and to constrain the possible recycling mechanisms. For …

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CRIRES+ Reveals the Chemistry of the Stellar Subpopulations in the Bulge Fossil Fragment Liller 1*

L. Chiappino, L. Origlia, C. Fanelli, A. Bartolomei et autres

Abstract In this paper, we present the chemical screening of the complex stellar population discovered in the Bulge Fossil Fragment Liller 1. This study is part of the Bulge Cluster Origin (BulCO) survey based on a Large Program at the ESO-Very Large …

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The one and the only: The pulsar-white dwarf system in NGC 6749

Paulo C. C. Freire Yinfeng Dai, Yinfeng Dai, Mario Cadelano, Cristina Pallanca et autres

PSR J1905+0154A is a binary millisecond pulsar (MSP) located in the globular cluster (GC) NGC 6749. It was discovered in 2004 in a search for pulsars in GCs carried out with the Arecibo 305-m radio telescope. The pulsar has a spin period …

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Kinematic catalog of stars in NGC 6569

Cristina Pallanca, Silvia Leanza, F. R. Ferraro, B. Lanzoni et autres

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The one and the only: The pulsar-white dwarf system in NGC 6749

Paulo C. C. Freire Yinfeng Dai, Yinfeng Dai, Mario Cadelano, Cristina Pallanca et autres

PSR J1905+0154A is a binary millisecond pulsar (MSP) located in the globular cluster (GC) NGC 6749. It was discovered in 2004 in a search for pulsars in GCs carried out with the Arecibo 305-m radio telescope. The pulsar has a spin period …

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A joint MeerKAT and Parkes view of Omega Centauri: New TRAPUM Searches and Pulsar Timing

Miquel Colom i Bernadich, Shi Dai, Federico Abbate, Matthew Kerr et autres

Millisecond pulsars (MSPs) are powerful probes of globular clusters (GCs), tracing stellar evolution, cluster dynamics, and the local gravitational potential. We investigate the MSP population in GC Omega Centauri. We perform Fourier-domain acceleration and jerk searches on MeerKAT observations, and carry out …

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A binary-related origin mediated by environmental conditions for blue straggler stars

F. R. Ferraro, B. Lanzoni, Enrico Vesperini, E. Dalessandro et autres

Blue stragglers are anomalously massive core hydrogen-burning stars that, according to the theory of single star evolution, should not exist. They are suspected to form in mass-enhancement processes, involving binary evolution or stellar collisions. In dynamically active systems like globular clusters, the …

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A binary-related origin mediated by environmental conditions for blue straggler stars

F. R. Ferraro, B. Lanzoni, Enrico Vesperini, E. Dalessandro et autres

Blue stragglers are anomalously massive core hydrogen-burning stars that, according to the theory of single star evolution, should not exist. They are suspected to form in mass-enhancement processes, involving binary evolution or stellar collisions. In dynamically active systems like globular clusters, the …

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Fast Rotating Blue Straggler Stars in the globular cluster NGC 1851

Alex Billi, L. Monaco, F. R. Ferraro, A. Mucciarelli et autres

In this work we study the rotational velocities of a sample of blue straggler stars (BSSs) and reference stars belonging to the Galactic globular cluster NGC 1851, using high-resolution spectra acquired with FLAMES-GIRAFFE at the ESO/VLT. After field decontamination based on radial …

Identification and characterization of optical companions to the population of millisecond pulsars in the globular cluster M3

Greta Ettorre, E. Dalessandro, Mario Cadelano, Cristina Pallanca et autres

Context. The study of binary millisecond pulsars (MSPs) in globular clusters (GCs) is a key element to study binary and stellar evolution under extreme conditions, and it provides interesting insights into the physical properties of their host stellar systems. Aims. In this …

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