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The Minimum Mass of Rotating Main Sequence Stars and its Impact on the Nature of Extended Main Sequence Turnoffs in Intermediate-Age Star Clusters in the Magellanic Clouds
Paul Goudfrooij, Leo Girardi, Andrea Bellini +3
Extended main sequence turn-offs (eMSTOs) are a common feature in color-magnitude diagrams (CMDs) of young and intermediate-age star clusters in the Magellanic Clouds. The nature o…
The Age of the Old Metal-Poor Globular Cluster NGC6397 Using WFC3/IR Photometry
Matteo Correnti, Mario Gennaro, Jason S. Kalirai +2
Globular Clusters (GCs) in the Milky Way represent the ideal laboratory to establish the age of the oldest stellar populations and to measure the color-magnitude relation of stars.…
On the use of the main sequence knee (saddle) to measure globular cluster ages
S. Saracino, E. Dalessandro, F. R. Ferraro +11
In this paper we review the operational definition of the so-called main sequence knee (MS-knee), a feature in the color-magnitude diagram (CMD) occurring at the low-mass end of th…
Alone on a wide wide sea. The origin of SECCO 1, an isolated star-forming gas cloud in the Virgo cluster
M. Bellazzini, L. Armillotta, S. Perina +12
SECCO1 is an extremely dark, low-mass (M_star=10^5 M_sun), star-forming stellar system lying in the Low Velocity Cloud (LVC) substructure of the Virgo cluster of galaxies, and host…