Results 31 to 40 of about 3,207 (171)
Ecology of Blue Straggler Stars [PDF]
, 2015 Ecology of Blue Straggler Stars, H.M.J. Boffin, G. Carraro & G.
Boffin, Henri M. J. +2 more
openaire +4 more sources
SPINNING LIKE A BLUE STRAGGLER: THE POPULATION OF FAST ROTATING BLUE STRAGGLER STARS IN ω CENTAURI [PDF]
The Astrophysical Journal, 2014 By using high-resolution spectra acquired with FLAMES-GIRAFFE at the ESO/VLT, we measured radial and rotational velocities for 110 Blue Straggler stars (BSSs) in Omega Centauri, the globular cluster-like stellar system harboring the largest known BSS population. According to their radial velocities, 109 BSSs are members of the system.
MUCCIARELLI, ALESSIO +5 more
openaire +3 more sources
The Astrophysical Journal, 2023 We have used the “dynamical clock” to measure the level of dynamical evolution reached by three Galactic globular clusters (namely, NGC 3201, NGC 6316, and NGC 6440).
Francesco R. Ferraro +5 more
doaj +1 more source
Blue Straggler Stars beyond the Milky Way. II. A Binary Origin for Blue Straggler Stars in Magellanic Cloud Clusters [PDF]
The Astrophysical Journal, 2018 Abstract We have analyzed populations of blue straggler stars (BSSs) in 24 Magellanic Cloud (MC) star clusters using multi-passband Hubble Space Telescope images. We compiled a homogeneous BSS database, containing both traditional and evolved BSSs.
Chengyuan Li +6 more
openaire +3 more sources
M67 Blue Stragglers with High-resolution Infrared Spectroscopy
The Astronomical Journal, 2023 We report on the first detailed infrared chemical analysis of five binary members (S277, S997, S975, S1031, and S1195) in the open cluster M67 (NGC 2682).
K. E. Brady +7 more
doaj +1 more source
BLUE STRAGGLER STAR POPULATIONS IN GLOBULAR CLUSTERS. I. DYNAMICAL PROPERTIES OF BLUE STRAGGLER STARS IN NGC 3201, NGC 6218, AND ω CENTAURI [PDF]
The Astrophysical Journal, 2014 We present the first dynamical study of Blue Straggler Stars (BSSs) in three Galactic globular clusters, NGC\,3201, NGC\,5139 ($ $Cen), and NGC\,6218, based on medium-resolution spectroscopy (R 10000) obtained with IMACS. Our BSS candidate selection technique uses HST/ACS and ESO/WFI photometric data out to $>\!4.5\,r_c$.
Thomas H. Puzia +2 more
openaire +8 more sources
A Wide Metallicity Range for Gyr-old Stars in the Nuclear Star Cluster
The Astrophysical Journal Letters, 2023 We report metallicities for three ∼Gyr-old stars in the Milky Way nuclear star cluster (NSC) using high-resolution near-infrared spectroscopy. We derive effective temperatures from a calibration with Sc line strength, which yields results in good ...
B. Thorsbro +8 more
doaj +1 more source
Blue straggler stars in dwarf spheroidal galaxies - II. Sculptor and Fornax [PDF]
Monthly Notices of the Royal Astronomical Society, 2009 The existence of blue straggler stars (BSSs) in dwarf spheroidal galaxies (dSphs) is still an open question. In fact, many BSS candidates have been observed in the Local Group dSphs, but it is unclear whether they are real BSSs or young stars. Shedding light on the nature of these BSS candidates is crucial, in order to understand the star formation ...
Michela Mapelli +6 more
openalex +7 more sources
The Astrophysical Journal, 2023 We present the first far-UV (FUV) imaging results of the intermediate-age Galactic open cluster NGC 2818 that has a planetary nebula (PN) within the field using images taken from the Ultra Violet Imaging Telescope (UVIT) aboard AstroSat.
Sharmila Rani +3 more
doaj +1 more source
Blue Straggler Stars in Globular Clusters: a powerful tool to probe the internal dynamical evolution of stellar systems [PDF]
, 2014 This chapter presents an overview of the main observational results obtained to date about Blue Straggler Stars (BSSs) in Galactic Globular Clusters (GCs).
A. Dotter +80 more
core +2 more sources