Blue Stragglers as Stellar Collision Products: the Angular Momentum Question

Abstract

We investigate the structure and evolution of blue stragglers stars which were formed from direct stellar collisions between main sequence stars in globular clusters. In particular, we look at the rotational evolution of the products of off-axis collisions. As found in previous work, such blue stragglers initially have too high an angular momentum to contract down to the main sequence. We consider angular momentum loss through either disc locking or locking to an outflowing wind and show that both methods allow the merged object to shed sufficient angular momentum to contract down to the main sequence.

accepted by MNRAS

References in corpus (6)

• Blue straggler production in globular clusters
• Blue Straggler Stars: a direct comparison of Star counts and population ratios in six Galactic Globular Clusters
• Disk-locking and the presence of slow rotators among solar-type stars in young star clusters
• High-resolution simulations of stellar collisions between equal-mass main-sequence stars in globular clusters
• Does Disk Locking Solve the Stellar Angular Momentum Problem?
• First Evidence of Circumstellar Disks around Blue Straggler Stars

Cited by in corpus (62)

• The rotation rates of massive stars: the role of binary interaction through tides, mass transfer and mergers
• The evolution of runaway stellar collision products
• Structure and evolution of high-mass stellar mergers
• Where the Blue Stragglers Roam: Searching for a Link Between Formation and Environment
• An Analytic Technique for Constraining the Dynamical Origins of Multiple Star Systems Containing Merger Products
• Violent Stellar Merger Model for Transient Events
• Stellar mergers as the origin of the blue main-sequence band in young star clusters
• Stellar triples on the edge; Comprehensive overview of the evolution of destabilised triples leading to stellar and binary exotica
• On the onset of runaway stellar collisions in dense star clusters - II. Hydrodynamics of three-body interactions
• Smoothed Particle Hydrodynamics simulations of white dwarf collisions and close encounters
• Blue Lurkers: Hidden Blue Stragglers on the M67 Main Sequence Identified from their Kepler/K2 Rotation Periods
• On the Origin of Sub-subgiant Stars. I. Demographics
• Evolution of stellar collision products in open clusters. I. Blue stragglers in N-body models of M67
• Chemical and kinematical properties of BSSs and HB stars in NGC 6397
• Very Wide Binary Stars as the Primary Source of Stellar Collisions in the Galaxy
• Hypervelocity Collisions of Binary Stars at the Galactic Centre
• Evolution of stellar collision products in open clusters. II. A grid of low-mass collisions
• Pre-supernova evolution and final fate of stellar mergers and accretors of binary mass transfer
• A Spectroscopic Analysis of Blue Stragglers, Horizontal Branch and Turn-Off Stars in Four Globular Clusters
• Tidal disruption events, main-sequence extreme-mass ratio inspirals and binary star disruptions in galactic nuclei
• Fast rotating Blue Stragglers in the globular cluster M4
• WIYN Open Cluster Study. LIX. Radial-Velocity Membership of the Evolved Population of the Old Open Cluster NGC 6791
• Star Cluster Ecology: VII The evolution of young dense star clusters containing primordial binaries
• On the Origin of Sub-subgiant Stars. III. Formation Frequencies
• Fast rotating Blue Stragglers prefer loose clusters
• FLAMES and XSHOOTER spectroscopy along the two BSS sequences of M30
• Observations of Spin-Down in Post-Mast-Transfer Stars and the Possibility for Blue Straggler Gyrochronology
• Oscillating Blue Stragglers, gamma Doradus stars and eclipsing binaries in the open cluster NGC2506
• WOCS 5379: Detailed Analysis of the Evolution of a Post-Mass-Transfer Blue Straggler
• UOCS.VI. UVIT/AstroSat detection of low-mass white dwarf companions to 4 more blue stragglers in M67
• IR nebulae around bright massive stars as indicators for binary interactions
• The Blue Stragglers of the Old Open Cluster NGC 188
• Spinning like a Blue Straggler: the population of fast rotating Blue Straggler stars in Omega Centauri
• Stellar Collisions in Galactic Nuclei: Impact on Destructive Events Near a Supermassive Black Hole
• Magnetic Activity in Stellar Merger Products
• A chemical study of M67 candidate blue stragglers and evolved blue stragglers observed with APOGEE DR14
• Empirical measurement of the dynamical ages of three globular clusters and some considerations on the use of the dynamical clock
• Another brick in understanding chemical and kinematical properties of BSSs: NGC 6752
• The blue straggler population of the open clusters Trumpler 5, Trumpler 20, and NGC 2477
• Rotation of Kepler field dwarfs and sub giants: Spectroscopic $v\sin I$ from APOGEE
• Simple Stellar Population Models as probed by the Large Magellanic Cloud Star Cluster ESO 121-SC03
• Blue Stragglers and Friends: Initial Evolutionary Pathways in Close Low-Mass Binaries: Literature Review
• The MODEST questions: challenges and future directions in stellar cluster research
• Spectroscopic and asteroseismic analysis of the remarkable main-sequence A star KIC 11145123
• Blue Straggler Star Populations in Globular Clusters: I. Dynamical Properties of Blue Straggler Stars in NGC 3201, NGC 6218 and $\omega$ Centauri
• Explaining the Praesepe blue straggler HD 73666
• M67 Blue Stragglers with High-resolution Infrared Spectroscopy
• Segregation and Collisions in Galactic Nuclei: Rates of Destructive Events Near a Supermassive Black Hole
• The Blue Lurker WOCS 14020: A Long-Period Post-Common-Envelope Binary in M67 Originating from a Merger in a Triple System
• A binary-related origin mediated by environmental conditions for blue straggler stars
• Today a Duo, But Once a Trio? The Double White Dwarf HS 2220$+$2146 May Be A Post-Blue Straggler Binary
• Blue Straggler Stars in Globular Clusters: a powerful tool to probe the internal dynamical evolution of stellar systems
• Binary imposters: Mergers in massive hierarchical triple stars
• Searching for new observational signatures of the dynamical evolution of star clusters
• Formation Channels for Blue Straggler Stars
• Astrophysics in 2005
• Multiple stellar populations and their influence on blue stragglers
• Rotational velocities of Blue Straggler Stars in the Globular Cluster M55
• Detection of a white dwarf orbiting a Carbon-Oxygen depleted blue straggler in 47 Tucanae
• Models of Individual Blue Stragglers
• Fast Rotating Blue Straggler Stars in the globular cluster NGC 1851
• Spectroscopic Line Modeling of the Fastest Rotating O-type Stars