Results 1 to 10 of about 36,679 (341)

Is Earendel a Star Cluster?: Metal-poor Globular Cluster Progenitors at z ∼ 6

The Astrophysical Journal Letters
The strongly lensed z  ∼ 6 Sunrise galaxy offers an incredible opportunity to investigate star formation in the early Universe on parsec or smaller scales.
Massimo Pascale, Liang Dai, Brenda L. Frye, Aliza G. Beverage   +3 more
doaj   +2 more sources

Cracking the Relation Between Mass and 1P-star Fraction of Globular Clusters. III. Initial Distributions of In Situ and Ex Situ Clusters

The Astrophysical Journal
Galactic globular clusters consist of two main stellar populations, the pristine (1P) and polluted (2P) stars. The fraction of 1P stars in clusters, F _1P , is a decreasing function of the present-day cluster mass, m _prst . The information about cluster
Geneviève Parmentier
doaj   +2 more sources

The GeMS/GSAOI Galactic Globular Cluster Survey (G4CS). II. Characterization of 47 Tuc with Bayesian Statistics

The Astrophysical Journal, 2023
We present a photometric analysis of globular cluster 47 Tuc (NGC 104) using near-IR imaging data from the GeMS/GSAOI Galactic Globular Cluster Survey (G4CS), which is in operation at Gemini-South telescope.
Mirko Simunovic, Thomas H. Puzia, Bryan Miller, Eleazar R. Carrasco, Aaron Dotter, Santi Cassisi, Stephanie Monty, Peter Stetson   +7 more
doaj   +1 more source

A Wide View of the Galactic Globular Cluster NGC 2808: Red Giant and Horizontal Branch Star Spatial Distributions

The Astronomical Journal, 2023
Wide-field and deep DECam multiband photometry, combined with HST data for the core of the Galactic globular cluster NGC 2808, allowed us to study the distribution of various stellar subpopulations and stars in different evolutionary phases out to the ...
Christian I. Johnson, Annalisa Calamida, Justin A. Kader, Ivan Ferraro, Catherine A. Pilachowski, Giuseppe Bono, Alessandra Mastrobuono-Battisti, Armin Rest, Alfredo Zenteno, Alice Zocchi   +9 more
doaj   +1 more source

oMEGACat. I. MUSE Spectroscopy of 300,000 Stars within the Half-light Radius of ω Centauri

The Astrophysical Journal, 2023
Omega Centauri ( ω Cen) is the most massive globular cluster of the Milky Way and has been the focus of many studies that reveal the complexity of its stellar populations and kinematics.
M. S. Nitschai, N. Neumayer, C. Clontz, M. Häberle, A. C. Seth, T.-O. Husser, S. Kamann, M. Alfaro-Cuello, N. Kacharov, A. Bellini, A. Dotter, S. Dreizler, A. Feldmeier-Krause, M. Latour, M. Libralato, A. P. Milone, R. Pechetti, G. van de Ven, K. Voggel, Daniel R. Weisz   +19 more
doaj   +1 more source

First Evidence of Multi-iron Subpopulations in the Bulge Fossil Fragment Candidate Liller 1

The Astrophysical Journal, 2023
In the context of a project aimed at characterizing the properties of the so-called Bulge Fossil Fragments (the fossil remnants of the bulge formation epoch), here we present the first determination of the metallicity distribution of Liller 1.
Chiara Crociati, Elena Valenti, Francesco R. Ferraro, Cristina Pallanca, Barbara Lanzoni, Mario Cadelano, Cristiano Fanelli, Livia Origlia, Silvia Leanza, Emanuele Dalessandro, Alessio Mucciarelli, R. Michael Rich   +11 more
doaj   +1 more source

Future of the General Catalogue of Variable Stars from the Experience of Recent Name-lists

Open Astronomy, 2021
We briefly outline the history of the General Catalogue of Variable Stars (GCVS) and the New Catalogue of Suspected Variable Stars (NSV catalogue). Recently, we have completed a revision of the NSV catalogue.
Samus Nikolay N., Kazarovets Elena V., Durlevich Olga V., Kireeva Natalia N., Pastukhova Elena N., Khruslov Anton V.   +5 more
doaj   +1 more source

Calibrating X-Ray Binary Luminosity Functions via Optical Reconnaissance. II. The High-mass XLF and Globular Cluster Population of X-Ray Binaries in the Low Star-forming Spiral M81

The Astrophysical Journal, 2023
We characterize the optical counterparts to the compact X-ray source population within the nearby spiral galaxy M81 using multiband Hubble Space Telescope (HST) imaging data.
Qiana Hunt, Elena Gallo, Rupali Chandar, Angus Mok, Andrea Prestwich   +4 more
doaj   +1 more source

Searching for New Globular Clusters in M31 with Gaia EDR3

The Astrophysical Journal, 2023
We have found 50 new globular cluster (GC) candidates around M31 with Gaia Early Data Release 3 (EDR3), with the help of Pan-STARRS1 DR1 magnitudes and Pan-Andromeda Archaeological Survey (PAndAS) images.
Yilun Wang, Haibo Yuan, Bingqiu Chen, Xinlei Chen, Hao Wu, Zexi Niu, Song Huang, Jifeng Liu   +7 more
doaj   +1 more source

The Global Mass Functions of 35 Galactic globular clusters: II. Clues on the Initial Mass Function and Black Hole Retention Fraction [PDF]

, 2017
In this paper we compare the mass function slopes of Galactic globular clusters recently determined by Sollima & Baumgardt (2017) with a set of dedicated N-body simulations of star clusters containing between 65,000 to 200,000 stars.
Baumgardt, Holger, Sollima, Antonio
core   +2 more sources