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INVESTIGATING THE MASS SEGREGATION PROCESS IN GLOBULAR CLUSTERS WITH BLUE STRAGGLER STARS: THE IMPACT OF DARK REMNANTS
- Source :
- The Astrophysical Journal. 833:252
- Publication Year :
- 2016
- Publisher :
- American Astronomical Society, 2016.
-
Abstract
- We present the results of a set of N-body simulations aimed at exploring how the process of mass segregation (as traced by the spatial distribution of blue straggler stars, BSSs) is affected by the presence of a population of heavy dark remnants (as neutron stars and black holes). To this end, clusters characterized by different initial concentrations and different fractions of dark remnants have been modeled. We find that an increasing fraction of stellar-mass black holes significantly delays the mass segregation of BSSs and the visible stellar component. In order to trace the evolution of BSS segregation, we introduce a new parameter ($A^+$) that can be easily measured when the cumulative radial distribution of these stars and a reference population are available. Our simulations show that $A^+$ might also be used as an approximate indicator of the time remaining to the core collapse of the visible component.<br />ApJ accepted
- Subjects :
- Astrophysics::High Energy Astrophysical Phenomena
stars: kinematics and dynamic
FOS: Physical sciences
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
globular clusters: general
01 natural sciences
Blue straggler
methods: numerical
0103 physical sciences
Astrophysics::Solar and Stellar Astrophysics
Mass segregation
010303 astronomy & astrophysics
Solar and Stellar Astrophysics (astro-ph.SR)
Astrophysics::Galaxy Astrophysics
Physics
010308 nuclear & particles physics
Astronomy and Astrophysics
blue straggler
Astronomy and Astrophysic
Astrophysics - Astrophysics of Galaxies
Stars
Astrophysics - Solar and Stellar Astrophysics
Space and Planetary Science
Astrophysics of Galaxies (astro-ph.GA)
Globular cluster
Subjects
Details
- ISSN :
- 15384357
- Volume :
- 833
- Database :
- OpenAIRE
- Journal :
- The Astrophysical Journal
- Accession number :
- edsair.doi.dedup.....b097b3e53b59e4a109eed205a34c0ad5