Results 11 to 20 of about 36,167 (318)

Massive star archeology in globular clusters [PDF]

Proceedings of the International Astronomical Union, 2014
AbstractGlobular clusters are among the oldest structures in the Universe and they host today low-mass stars and no gas. However, there has been a time when they formed as gaseous objects hosting a large number of short-lived, massive stars. Many details on this early epoch have been depicted recently through unprecedented dissection of low-mass ...
Chantereau, W., Charbonnel, C., Meynet, G.   +2 more
openaire   +6 more sources

Dynamics of Stars and Globular Clusters in M87 [PDF]

The Astrophysical Journal, 2001
We examine the dynamics of the stars and globular clusters in the nearby giant galaxy M87 and constrain the mass distribution, using all the available data over a large range of radii, including higher-order moments of the stellar line-of-sight velocity distributions and the discrete velocities of over two hundred globular clusters.
Christopher S. Kochanek, Aaron J. Romanowsky, Aaron J. Romanowsky   +2 more
openaire   +6 more sources

Blue hook stars in globular clusters [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2009
Abstract Blue hook (BHk) stars are a rare class of horizontal branch stars that have so far been found in only very few Galactic globular clusters (GCs). The dominant mechanism for producing these objects is currently still unclear.
Dieball, A., Knigge, C., Maccarone, T.J., Long, K.S., Hannikainen, D.C., Zurek, D., Shara, M.   +6 more
openaire   +5 more sources

Massive Stars and Globular Cluster Formation [PDF]

The Astrophysical Journal, 2007
We first present chemodynamical simulations to investigate how stellar winds of massive stars influence early dynamical and chemical evolution of forming globular clusters (GCs). In our numerical models, GCs form in turbulent,high-density giant molecular clouds (GMCs), which are embedded in a massive dark matter halo at high redshifts. We show how high-
Masashi Chiba, Kenji Bekki
openaire   +4 more sources

On the absence of symbiotic stars in globular clusters [PDF]

Monthly Notices of the Royal Astronomical Society, 2020
ABSTRACT Even though plenty of symbiotic stars (SySts) have been found in the Galactic field and nearby galaxies, not a single one has ever been confirmed in a Galactic globular cluster (GC). We investigate the lack of such systems in GCs for the first time by analysing 144 GC models evolved with the mocca code, which have different ...
K. Iłkiewicz, K. Iłkiewicz, Liliana E. Rivera Sandoval, Diogo Belloni, Claudia V. Rodrigues, Mirek Giersz, Joanna Mikolajewska, Matthias R. Schreiber   +7 more
openaire   +3 more sources

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

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

Variability in NGC 3201 Giant Stars

The Astronomical Journal, 2023
We present the analysis of 510 light curves in V and I bands of 255 giant stars in the globular cluster NGC 3201. Our aim is to expand the sample of new types of variables reported in a previous study. These variables show a short period ( P _V < 0.6 day)
C. C. Cortés, Á. Llancaqueo Albornoz, S. Villanova, J. A. Ahumada, C. Parisi   +4 more
doaj   +1 more source

The Origin of Gamma-Rays from Globular Clusters [PDF]

, 2010
Fermi has detected gamma-ray emission from eight globular clusters. We suggest that the gamma-ray emission from globular clusters may result from the inverse Compton scattering between relativistic electrons/positrons in the pulsar wind of MSPs in the ...
Cheng, K. S., Chernyshov, D. O., Dogiel, V. A., Hui, C. Y., Kong, A. K. H.   +4 more
core   +2 more sources