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ABOUT


POSYDON : POpulation SYnthesis with Detailed binary-evolution simulatiONs

A next-generation single and binary-star population synthesis code incorporating full stellar structure and evolution modeling with the use of MESA.

POSYDON is being developed by a collaborative team of astrophysicists and computer scientists led by Principal Investigators Tassos Fragos (Université de Genève) and Vicky Kalogera (Northwestern University). The code is modular in many aspects and the user can specify initial population properties and adopt choices that determine how stellar evolution proceeds. Populations are simulated with the use of MESA evolutionary tracks for single, non-interacting, and interacting binaries organized in grids. Machine-learning methods are incorporated and applied on the grids for classification and various interpolation calculations, and the development of irregular grids guided by active learning, for computational efficiency.

POSYDON is a a publically available, community tool. In the different tabs found at the top of the page one can access the source code, find extensive documentation on installing and using POSYDON, access the grids of single- and binary-star evolutionary models via an advanced database query system, and perform small-scale population synthesis simulations with POSYDON using a user-friendly web application.

NEWS


  • [November 7th, 2022] We posted on the arXiv a paper about the natal kick of the black hole in the X-ray binary MAXI J1305-704 (Kimball et al.)
  • [September 16th, 2022] We posted on the arXiv a paper about the lower mass gap with low mass X-ray binary population synthesis (Siegel et al.)
  • [September 14th, 2022] We posted on the arXiv a paper about the signatures of different physical processes using detailed binary evolution calculations (Misra et al.)
  • [April 1st, 2022] We posted on the arXiv a paper about a new active-learning algorithm that can efficiently create the grids of binary simulations used by POSYDON as an input (Rocha et al.)
  • [February 15th, 2022] We posted on the arXiv the preprint version of the POSYDON v1.0 instrument paper (Fragos et al.). This describes the first version of our code and grids of simulated binaries
  • [November 4th, 2021] We published on ACM SIGSPATIAL'2021 a new demo paper about a prototype system for coupling similarity and diversity for clustering astrophysics multivariate datasets (Teng et al.)
  • [August 23rd, 2021] We published on SSTD'2021 a new demo paper about a system for context aware clustering of stellar evolution (Teng et al.)
  • [July 1st, 2021] We posted on the arXiv a new paper about the probing the progenitors of spinning binary black-hole mergers with long gamma-ray bursts (Bavera et al.)
  • [June 10th, 2021] We posted on the arXiv a new paper about the explodability of single massive star progenitors of stripped-envelope supernovae (Zapartas et al.)
  • [December 3rd, 2020] We posted on the arXiv a new paper about the role of core-collapse physics in the observability of black-hole neutron-star mergers as multi-messenger sources (Rom├ín-Garza et al.)
  • [October 30th, 2020] We posted on the arXiv a new paper about the impact of mass-transfer physics on the observable properties of field binary black hole populations (Bavera et al.)

TEAM


Jeff Andrews

Northwestern University

Simone Bavera

Université de Genève

Christopher Berry

Northwestern University

Scott Coughlin

(Past member)

Northwestern University

Aaron Dotter

Northwestern University

Tassos Fragos

Université de Genève

Prabin Giri

Iowa State University

Vicky Kalogera

Northwestern University

Aggelos Katsaggelos

Northwestern University

Konstantinos Kovlakas

Université de Genève

Shamal Lalvani

Northwestern University

Devina Misra

Université de Genève

Ying Qin

(Past member)

Northwestern University

Jaime Román-Garza

(Past member)

Université de Genève

Kyle Rocha

Northwestern University

Juan Gabriel Serra Pérez

(Past member)

Northwestern University

Petter Alexander Stahle

Université de Genève

Philipp M. Srivastava

Northwestern University

Meng Sun

Northwestern University

Elizabeth Teng

Northwestern University

Xu Teng

Iowa State University

Goce Trajcevski

Iowa State University

Nam Tran


(Past member)

University of Copenhagen

Zepei Xing

Université de Genève

Manos Zapartas

Université de Genève

FUNDING