140 citations · 1.8k across the 74 of their papers we have counts for
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Discovery of over a thousand variable stars in Terzan 5 and Liller 1 with JWST
Kevin B. Burdge, Ilaria Caiazzo, Malina M. Desai +18
The Bulge Fossil Fragments Terzan 5 and Liller 1 host some of the densest stellar environments in the Galaxy, yet their variable star populations have remained largely unexplored d…
The youngest white dwarf companion to a millisecond pulsar: Insights from NGC 362D
Greta Ettorre, Emanuele Dalessandro, Mario Cadelano +7
We report on the identification of the optical counterpart to the recently discovered millisecond pulsar (MSP) NGC362D in the Galactic globular cluster NGC362 based on deep, multi-…
A candidate to the long sought optical counterpart to the Rapid Burster in the bulge fossil fragment Liller 1
Cristina Pallanca, Francesco R. Ferraro, Barbara Lanzoni +6
We report on the possible identification of the optical counterpart of the Rapid Burster MXB 1730-335 in the stellar system Liller 1. The identification was performed by taking adv…
A binary-related origin mediated by environmental conditions for blue straggler stars
Francesco R. Ferraro, Barbara Lanzoni, Enrico Vesperini +7
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-enh…
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Westerlund 1 and 2 Open Clusters Survey
M. G. Guarcello, E. Flaccomio, J. F. Albacete-Colombo +48
Context. With a mass exceeding several 10^4 solar masses and a rich and dense population of massive stars, supermassive young star clusters represent the most massive star-forming…
Fast rotating Blue Stragglers prefer loose clusters
Francesco R. Ferraro, Alessio Mucciarelli, Barbara Lanzoni +9
Blue stragglers are anomalously luminous core hydrogen-burning stars formed through mass-transfer in binary/triple systems and stellar collisions. Their physical and evolutionary p…
The "canonical" White Dwarf Cooling Sequence of M5
Jianxing Chen, Francesco R. Ferraro, Maurizio Salaris +5
Recently, a new class of white dwarfs (dubbed ``slowly cooling WDs'') has been identified in two globular clusters (namely M13 and NGC 6752) showing a horizontal branch (HB) morpho…
Discovery of a double sequence of blue straggler stars in the core-collapsed globular cluster NGC 6256
Mario Cadelano, Francesco R. Ferraro, Emanuele Dalessandro +3
We used a combination of high-resolution optical images acquired with the Hubble Space Telescope and near-IR wide-field data to investigate the stellar density profile and the popu…
Slowly cooling white dwarfs in NGC 6752
J. Chen, F. R. Ferraro, M. Cadelano +6
Recently, a new class of white dwarfs (``slowly cooling WDs'') has been identified in the globular cluster M13. The cooling time of these stars is increased by stable thermonuclear…
The RGB tip of galactic globular clusters and the revision of the bound of the axion-electron coupling
O. Straniero, C. Pallanca, E. Dalessandro +5
By combining Hubble Space Telescope (HST) and ground based optical and near-infrared photometric samples, we derive the RGB tip absolute magnitude of 22 galactic globular clusters…
A kinematic view of NGC 1261: structural parameters, internal dispersion, absolute proper motion and Blue Straggler Stars
S. Raso, M. Libralato, A. Bellini +8
We constructed a Hubble Space Telescope (HST) astro-photometric catalog of the central region of the Galactic globular cluster NGC 1261. This catalog, complemented with Gaia DR2 da…
High-resolution extinction map in the direction of the bulge globular cluster NGC 6440
Cristina Pallanca, Francesco R. Ferraro, Barbara Lanzoni +3
We used optical images acquired with the UVIS channel of the Wide Field Camera 3 on board of the Hubble Space Telescope to construct the first high-resolution extinction map in the…
Spectral Energy Distribution of Blue Stragglers in the core of 47 Tucanae
S. Raso, C. Pallanca, F. R. Ferraro +8
We have constructed the Spectral Energy Distributions (SEDs) of a sample of Blue Straggler Stars (BSSs) in the core of the globular cluster 47 Tucanae, taking advantage of the larg…
A complete census of emitters in NGC 6397
Cristina Pallanca, Giacomo Beccari, Francesco R. Ferraro +3
We used a dataset of archival Hubble Space Telescope images obtained through the F555W, F814W and F656N filters, to perform a complete search for objects showing emission in t…
Proper motions and structural parameters of the Galactic globular cluster M71
M. Cadelano, E. Dalessandro, F. R. Ferraro +4
By exploiting two ACS/HST datasets separated by a temporal baseline of ~7 years, we have determined the relative stellar proper motions (providing membership) and the absolute prop…
Weighing stars: the identification of an Evolved Blue Straggler Star in the globular cluster 47 Tucanae
F. R. Ferraro, E. Lapenna, A. Mucciarelli +4
Globular clusters are known to host peculiar objects, named Blue Straggler Stars (BSSs), significantly heavier than the normal stellar population. While these stars can be easily i…
Probing the MSP prenatal stage: the optical identification of the X-ray burster EXO 1745-248 in Terzan 5
F. R. Ferraro, C. Pallanca, B. Lanzoni +5
We report on the optical identification of the neutron star burster EXO 1745-248 in Terzan 5. The identification was performed by exploiting HST/ACS images acquired in Director's D…
Radio Timing and Optical Photometry of the Black Widow System PSR J1953+1846A in the Globular Cluster M71
M. Cadelano, C. Pallanca, F. R. Ferraro +6
We report on the determination of the astrometric, spin and orbital parameters for PSR J1953+1846A, a "black widow" binary millisecond pulsar in the globular cluster M71. By using…
Radio timing and optical photometry of the black widow system PSR J1518+0204C in the globular cluster M5
C. Pallanca, S. M. Ransom, F. R. Ferraro +5
We report on the determination of astrometric, spin and orbital parameters for PSR J1518+0204C, a "black widow" binary millisecond pulsar in the globular cluster M5. The accurate p…
Cosmic-Lab: Optical companions to binary Millisecond Pulsars
Cristina Pallanca
Millisecond Pulsars (MSPs) are fast rotating, highly magnetized neutron stars. According to the "canonical recycling scenario", MSPs form in binary systems containing a neutron sta…
Constraining the true nature of an exotic binary in the core of NGC 6624
E. Dalessandro, C. Pallanca, F. R. Ferraro +4
We report on the identification of the optical counterpart to Star1, the exotic object serendipitously discovered by Deutsch et al. in the core of the Galactic globular cluster NGC…
New clues on the nature of the companion to PSR~J1740-5340 in NGC6397 from XSHOOTER spectroscopy
A. Mucciarelli, M. Salaris, B. Lanzoni +4
By using XSHOOTER spectra acquired at the ESO Very Large Telescope, we have studied the surface chemical composition of the companion star to the binary millisecond pulsar PSR J174…
The optical counterpart to the X-ray transient IGR J18245-2452 in the globular cluster M28
C. Pallanca, E. Dalessandro, F. R. Ferraro +3
We report on the identification of the optical counterpart to the recently detected INTEGRAL transient IGR J18245-2452 in the Galactic globular cluster M28. From the analysis of a…
The optical companion to the intermediate mass millisecond pulsar J1439-5501 in the Galactic field
C. Pallanca, B. Lanzoni, E. Dalessandro +5
We present the identification of the companion star to the intermediate mass binary pulsar J1439-5501 obtained by means of ground-based deep images in the B, V and I bands, acquire…