Exploring the role of binarity in the origin of the bimodal rotational velocity distribution in stellar clusters

  title={Exploring the role of binarity in the origin of the bimodal rotational velocity distribution in stellar clusters},
  author={Sebastian Kamann and N. Bastian and Christopher Usher and Ivan Cabrera-Ziri and Sara Saracino},
  journal={Monthly Notices of the Royal Astronomical Society},
Many young- and intermediate-age massive stellar clusters host bimodal distributions in the rotation rates of their stellar populations, with a dominant peak of rapidly rotating stars and a secondary peak of slow rotators. The origin of this bimodal rotational distribution is currently debated and two main theories have been put forward in the literature. The first is that all/most stars are born as rapid rotators and that interacting binaries break a fraction of the stars, resulting in two… Expand

Figures from this paper


On the origin of the bimodal rotational velocity distribution in stellar clusters: rotation on the pre-main sequence
We address the origin of the observed bimodal rotational distribution of stars in massive young and intermediate age stellar clusters. This bimodality is seen as split main sequences at young agesExpand
How stellar rotation shapes the colour−magnitude diagram of the massive intermediate-age star cluster NGC 1846
We present a detailed study of stellar rotation in the massive 1.5 Gyr old cluster NGC 1846 in the Large Magellanic Cloud. Similar to other clusters at this age, NGC 1846 shows an extended mainExpand
The Effect of Stellar Rotation on Colour-Magnitude Diagrams: On the apparent presence of multiple populations in intermediate age stellar clusters
A significant number of intermediate age clusters (1 − 2 Gyr) in the Magellanic Clouds appear to have multiple stellar populations within them, derived from bi-modal or extended main sequence turnExpand
Using our recently improved Monte Carlo evolution code, we study the evolution of the binary fraction in globular clusters. In agreement with previous N-body simulations, we find generally that theExpand
Tidal-locking-induced Stellar Rotation Dichotomy in the Open Cluster NGC 2287?
Stars spend most of their lifetimes on the `main sequence' (MS) in the Hertzsprung--Russell diagram. The obvious double MSs seen in the equivalent color--magnitude diagrams characteristic of MilkyExpand
The extended main-sequence turn-off cluster NGC 1856: rotational evolution in a coeval stellar ensemble
Multiple or extended turnoffs in young clusters in the Magellanic Clouds have recently received large attention. A number of studies have shown that they may be interpreted as the result of aExpand
Dissecting the extended main-sequence turn-off of the young star cluster NGC 1850
We use the Wide Field Camera 3 onboard the Hubble Space Telescope to obtain deep, high-resolution photometry of the young (~ 100 Myr) star cluster NGC1850 in the Large Magellanic Cloud. We analyzeExpand
A stellar census in globular clusters with MUSE: Binaries in NGC 3201
We utilise multi-epoch MUSE spectroscopy to study binary stars in the core of the Galactic globular cluster NGC 3201. Our sample consists of 3553 stars with 54 883 spectra in total comprising 3200Expand
NGC 1866: First Spectroscopic Detection of Fast Rotating Stars in a Young LMC Cluster
High-resolution spectroscopic observations were taken of 29 extended main sequence turn-off (eMSTO) stars in the young ($\sim$200 Myr) LMC cluster, NGC 1866 using the Michigan/Magellan Fiber SystemExpand
Cluster kinematics and stellar rotation in NGC 419 with MUSE and adaptive optics
We present adaptive optics (AO)-assisted integral-field spectroscopy of the intermediate-age star cluster NGC 419 in the Small Magellanic Cloud. By investigating the cluster dynamics and the rotationExpand