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Implications of a density dependent IMF for the statistics of progenitors of gravitational wave sources

Published online by Cambridge University Press:  30 December 2019

Indulekha Kavila Open the ORCID record for Indulekha Kavila [Opens in a new window]  and
Megha Viswambharan
Indulekha Kavila
Affiliation:
School of Pure & Applied Physics, Mahatma Gandhi University, Kottayam 686560INDIA emails: [email protected], [email protected]
Megha Viswambharan
Affiliation:
School of Pure & Applied Physics, Mahatma Gandhi University, Kottayam 686560INDIA emails: [email protected], [email protected]
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Abstract

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Observations of mergers of multi-compact object systems offer insights to the formation processes of massive stars in globular clusters. Simulations of stellar clusters, may be used to understand and interpret observations. Simulations generally adopt an Initial Mass Function (IMF) with a Salpeter slope at the high mass end, for the initial distribution of stellar masses. However, observations of the nearest high mass star forming regions point to the IMF at the high mass end being flatter than Salpeter, in regions where the stellar densities are high. We explore the impact of this on the formation rate of potential GW sources, estimated from standard considerations. Globular clusters being significant contributors to the ionization history of the universe, the results have implications for the same. It impacts our ability to explore the putative mass gap, between the upper limit for neutron star masses and the lower limit for black hole masses, also.

Keywords

binaries: closeglobular clusters: generalopen clusters and associations: generalearly universe
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S346: High-mass X-ray Binaries: Illuminating the Passage from Massive Binaries to Merging Compact Objects , August 2018 , pp. 464 - 467
Copyright
© International Astronomical Union 2019 

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