Results 81 to 90 of about 1,887,044 (177)
UOCS. XIII. Study of the Far-ultraviolet Bright Stars in the Open Cluster NGC 2420 Using AstroSat
The Astrophysical JournalWe present the study of four far-ultraviolet (FUV) bright stars in the field of the open cluster NGC 2420 using the Ultra Violet Imaging Telescope mounted on AstroSat.
R. K. S. Yadav +5 more
doaj +1 more source
Investigation of high-quality spectra of a sample of high-radial-velocity stars★
Astronomy & AstrophysicsContext. Old, metal-poor stars are perfect tracers of the formation of the Milky Way. The combination of chemical and kinematic investigations into them provides an insight into accretion episodes in the past history of our Galaxy. Aims.
Alazzawi J. M. K. +6 more
doaj +1 more source
Blue Straggler Stars In The Globular Cluster M53
, 2007 The first large-format CCD color-magnitude diagram (CMD) in the B and V passbands is presented for the Galactic globular cluster M53 (NGC 5024). We have discovered 117 new blue straggler (BS) candidates in the field of M53.
Soo-Chang Rey, Yong-ik Byun
core
Journal of Heterocyclic Chemistry, EarlyView.A robust method for synthesizing substituted oxadiazepines and related heterocycles via intramolecular SNAr is detailed. Under mild conditions, this methodology has been leveraged to afford products of varying electronic and aryl nature in up to 99% yields.
Matthew W. Reeves +4 more
wiley +1 more source
Revisiting the Evidence for Double Sequences of Blue Straggler Stars in Globular Clusters
The Astronomical JournalBlue straggler stars (BSSs) are believed to form through mass transfer in binary systems or stellar collisions. The reported presence of double BSS sequences in some globular clusters (GCs) has been interpreted as evidence that these two formation ...
Gourav Kumawat +7 more
doaj +1 more source
New parameters for star-cluster dynamics: Observational results
Astronomy & AstrophysicsWe recently used a large set of Monte Carlo simulations of globular clusters (GCs) to define new, fully empirical parameters (named A51, P51, and S2.5) able to trace the internal dynamical evolution of dense stellar systems.
Lanzoni B., Ferraro F. R., Vesperini E.
doaj +1 more source
Stelle blue straggler in ammassi aperti galattici
, 2022 More than 60 years ago, in the optical color-magnitude diagram of the Galactic Globular Cluster M3 a new type of star was discovered: the blue straggler stars.
RAIN SEPULVEDA, MARIA JOSE DEL PILAR
core
A Fully‐Connected Chip‐Integrated Reconfigurable Mode‐Pairing Quantum Key Distribution Network
Laser &Photonics Reviews, EarlyView.This work constructs a fully connected reconfigurable chip‐integrated quantum key distribution network via the mode‐pairing protocol. Hybrid ECL and WSS chips cut wavelength and port overhead, realizing arbitrary‐user key sharing with merely two wavelengths.
Xiao‐Lei Jiang +14 more
wiley +1 more source
The Astronomical JournalTrumpler 5 is a populous, intermediate-age (∼3 Gyr), metal-poor ([Fe/H] ∼ −0.4) open cluster, located at a distance of approximately ∼3050 pc. This is a well-studied cluster for its broadened main-sequence (MS) and blue straggler star (BSS) population ...
Komal Chand, Anju Panthi, Kaushar Vaidya
doaj +1 more source
Nonprofit Management and Leadership, EarlyView.ABSTRACT The purpose of this paper is to develop foundational propositions designed to reflect success factors in the recruitment and retention of volunteers for future longevity. Using insights gathered from three universities' experiences of student volunteering during COVID‐19, plus capturing the experiences of volunteer involving organizations, we ...
Ingrid O'Brien +5 more
wiley +1 more source