Results 31 to 40 of about 12,121 (216)

The role of rotation on the formation of second generation stars in globular clusters

Monthly Notices of the Royal Astronomical Society, 2022
ABSTRACT By means of 3D hydrodynamic simulations, we explore the effects of rotation in the formation of second-generation (SG) stars in globular clusters (GC). Our simulations follow the SG formation in a first-generation (FG) internally rotating GC; SG stars form out of FG asymptotic giant branch (AGB) ejecta and external pristine gas ...
E Lacchin, F Calura, E Vesperini, A Mastrobuono-Battisti   +3 more
openaire   +4 more sources

The Next Generation Virgo Cluster Survey (NGVS). XXXI. The Kinematics of Intracluster Globular Clusters in the Core of the Virgo Cluster [PDF]

The Astrophysical Journal, 2018
Abstract Intracluster (IC) populations are expected to be a natural result of the hierarchical assembly of clusters, yet their low space densities make them difficult to detect and study. We present the first definitive kinematic detection of an IC population of globular clusters (GCs) in the Virgo cluster, around the central galaxy M87.
Alessia Longobardi, Eric W. Peng, Patrick Côté, J. Christopher Mihos, Laura Ferrarese, Thomas H. Puzia, Ariane Lançon, Hong-Xin Zhang, Roberto P. Muñoz, John P. Blakeslee, Puragra Guhathakurta, Patrick R. Durrell, Rúben Sánchez-Janssen, Elisa Toloba, Andrés Jordán, Susana Eyheramendy, Jean-Charles Cuillandre, Stephen D. J. Gwyn, Alessandro Boselli, Pierre-Alain Duc, Chengze Liu, Karla Alamo-Martínez, Mathieu Powalka, Sungsoon Lim   +23 more
openaire   +4 more sources

The Next Generation Virgo Cluster Survey. XXXIII. Stellar Population Gradients in the Virgo Cluster Core Globular Cluster System

The Astrophysical Journal, 2022
Abstract We present a study of the stellar populations of globular clusters (GCs) in the Virgo Cluster core with a homogeneous spectroscopic catalog of 692 GCs within a major-axis distance R maj = 840 kpc from M87. We investigate radial and azimuthal variations in the mean age, total metallicity, [Fe/H], and α-element ...
Ko, Youkyung, Peng, Eric W., Côté, Patrick, Ferrarese, Laura, Liu, Chengze, Longobardi, Alessia, Lançon, Ariane, Muñoz, Roberto P., Puzia, Thomas H., Alamo-Martínez, Karla A., Sales, Laura V., Ramos-Almendares, Felipe, Abadi, Mario G., Lee, Myung Gyoon, Hwang, Ho Seong, Caldwell, Nelson, Blakeslee, John P., Boselli, Alessandro, Cuillandre, Jean-Charles, Duc, Pierre-Alain, Eyheramendy, Susana, Guhathakurta, Puragra, Gwyn, Stephen, Jordán, Andrés, Lim, Sungsoon, Sánchez-Janssen, Rubén, Toloba, Elisa   +26 more
openaire   +4 more sources

The Next Generation Virgo Cluster Survey (NGVS). XXX. Ultra-diffuse Galaxies and Their Globular Cluster Systems [PDF]

The Astrophysical Journal, 2020
Abstract We present a study of ultra-diffuse galaxies (UDGs) in the Virgo Cluster based on deep imaging from the Next Generation Virgo Cluster Survey. Applying a new definition for the UDG class based on galaxy scaling relations, we define samples of 44 and 26 UDGs using expansive and restrictive selection criteria, respectively. Our UDG
Lim, Sungsoon, Côté, Patrick, Peng, Eric W., Ferrarese, Laura, Roediger, Joel C., Durrell, Patrick R., Mihos, J. Christopher, Wang, Kaixiang, Gwyn, S. D. J., Cuillandre, Jean-Charles, Liu, Chengze, Sánchez-Janssen, Rubén, Toloba, Elisa, Sales, Laura V., Guhathakurta, Puragra, Lançon, Ariane, Puzia, Thomas H.   +16 more
openaire   +4 more sources

THE NEXT GENERATION VIRGO CLUSTER SURVEY. VI. THE KINEMATICS OF ULTRA-COMPACT DWARFS AND GLOBULAR CLUSTERS IN M87 [PDF]

The Astrophysical Journal, 2015
27 pages, 21 figures.
Zhang, Hong-Xin, Peng, Eric W., Cote, Patrick, Liu, Chengze, Ferrarese, Laura, Cuillandre, Jean-Charles, Caldwell, Nelson, Gwyn, Stephen D. J., Jordan, Andrees, Lançon, Ariane, Li, Biao, Munoz, Roberto P., Puzia, Thomas H., Bekki, Kenji, Blakeslee, John P., Boselli, Alessandro, Drinkwater, Michael J., Duc, Pierre-Alain, Durrell, Patrick, Emsellem, Eric, Firth, Peter, Sanchez-Janssen, Ruben   +21 more
openaire   +6 more sources

Diversity and complexity in neural organoids

FEBS Letters, EarlyView.
Neural organoid research aims to expand genetic diversity on one side and increase tissue complexity on the other. Chimeroids integrate multiple donor genomes within single organoids. Self‐organising multi‐identity organoids, exogenous cell seeding, or enforced assembly of region‐specific organoids contribute to tissue complexity.
Ilaria Chiaradia, Madeline A. Lancaster
wiley   +1 more source

The fraction of first- and second-generation stars in globular clusters [PDF]

Astronomy & Astrophysics, 2013
We present a new method to estimate the fraction of stars with chemical composition of first and second(s) generation(s) currently hosted in Galactic globular clusters (GCs). We compare cluster and field stars of similar metallicity in the [Fe/H]-[Na/H] plane.
openaire   +2 more sources

The Next Generation Virgo Cluster Survey (NGVS). XXXII. A Search for Globular Cluster Substructures in the Virgo Galaxy Cluster Core [PDF]

The Astrophysical Journal, 2018
Abstract Substructure in globular cluster (GC) populations around large galaxies is expected in galaxy formation scenarios that involve accretion or merger events, and it has been searched for using direct associations between GCs and structure in the diffuse galaxy light, or with GC kinematics.
Mathieu Powalka, Thomas H. Puzia, Ariane Lançon, Alessia Longobardi, Eric W. Peng, Pierre-Alain Duc, Karla Alamo-Martínez, John P. Blakeslee, Patrick Côté, Jean-Charles Cuillandre, Patrick Durrell, Paul Eigenthaler, Laura Ferrarese, Puragra Guhathakurta, S. D. J. Gwyn, Patrick Hudelot, Chengze Liu, Simona Mei, Roberto P. Muñoz, Joel Roediger, Rubén Sánchez-Janssen, Elisa Toloba, Hongxin Zhang   +22 more
openaire   +5 more sources

The human gut microbiome across the life course

FEBS Letters, EarlyView.
Despite significant individual variation and continuous change throughout life, the human gut microbiome follows some life stage‐specific trends. This article provides a brief overview of how gut microbiome composition shifts across different phases of life. Created in BioRender. Özkurt, E. (2026) https://BioRender.com/8q4nrnc.
Alise J. Ponsero, Basak Bahcivanci, Antonietta Hayhoe, Animesh Acharjee, Ezgi Özkurt   +4 more
wiley   +1 more source

Ba STARS AND OTHER BINARIES IN FIRST AND SECOND GENERATION STARS IN GLOBULAR CLUSTERS [PDF]

The Astrophysical Journal, 2010
The determination of the Ba abundance in globular cluster (GC) stars is a very powerful test to address several issues in the framework of multiple population scenarios. We measured the Ba content for a sample of more than 1200 stars in 15 Galactic GCs, using high-resolution FLAMES/Giraffe spectra.
D'Orazi, V., Gratton, R., Lucatello, S., Carretta, E., Bragaglia, A., Marino, A. F.   +5 more
openaire   +4 more sources