Binary evolution leading to the formation of the very massive neutron star in the J0740+6620 binary system

We study the evolution of close binary systems in order to account for the existence of the recently observed binary system containing the most massive millisecond pulsar ever detected, PSR J0740+6620, and its ultra-cool helium white dwarf companion. In order to find a progenitor for this object we...

Descripción completa

Detalles Bibliográficos
Autores principales:	Echeveste, Maite, Novarino, María Leonela, Benvenuto, Omar Gustavo, De Vito, María Alejandra
Formato:	Articulo Preprint
Lenguaje:	Inglés
Publicado:	2020
Materias:	Ciencias Astronómicas (stars:) binaries (including multiple): close (stars:) pulsars: general
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/125005
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-125005
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Astronómicas (stars:) binaries (including multiple): close (stars:) pulsars: general
spellingShingle	Ciencias Astronómicas (stars:) binaries (including multiple): close (stars:) pulsars: general Echeveste, Maite Novarino, María Leonela Benvenuto, Omar Gustavo De Vito, María Alejandra Binary evolution leading to the formation of the very massive neutron star in the J0740+6620 binary system
topic_facet	Ciencias Astronómicas (stars:) binaries (including multiple): close (stars:) pulsars: general
description	We study the evolution of close binary systems in order to account for the existence of the recently observed binary system containing the most massive millisecond pulsar ever detected, PSR J0740+6620, and its ultra-cool helium white dwarf companion. In order to find a progenitor for this object we compute the evolution of several binary systems composed by a neutron star and a normal donor star employing our stellar code. We assume conservative mass transfer. We also explore the effects of irradiation feedback on the system. We find that irradiated models also provide adequate models for the millisecond pulsar and its companion, so both irradiated and non irradiated systems are good progenitors for PSR J0740+6620. Finally, we obtain a binary system that evolves and accounts for the observational data of the system composed by PSR J0740+6620 (i.e. orbital period, mass, effective temperature and inferred metallicity of the companion, and mass of the neutron star) in a time scale smaller than the age of the Universe. In order to reach an effective temperature as low as observed, the donor star should have an helium envelope as demanded by observations.
format	Articulo Preprint
author	Echeveste, Maite Novarino, María Leonela Benvenuto, Omar Gustavo De Vito, María Alejandra
author_facet	Echeveste, Maite Novarino, María Leonela Benvenuto, Omar Gustavo De Vito, María Alejandra
author_sort	Echeveste, Maite
title	Binary evolution leading to the formation of the very massive neutron star in the J0740+6620 binary system
title_short	Binary evolution leading to the formation of the very massive neutron star in the J0740+6620 binary system
title_full	Binary evolution leading to the formation of the very massive neutron star in the J0740+6620 binary system
title_fullStr	Binary evolution leading to the formation of the very massive neutron star in the J0740+6620 binary system
title_full_unstemmed	Binary evolution leading to the formation of the very massive neutron star in the J0740+6620 binary system
title_sort	binary evolution leading to the formation of the very massive neutron star in the j0740+6620 binary system
publishDate	2020
url	http://sedici.unlp.edu.ar/handle/10915/125005
work_keys_str_mv	AT echevestemaite binaryevolutionleadingtotheformationoftheverymassiveneutronstarinthej07406620binarysystem AT novarinomarialeonela binaryevolutionleadingtotheformationoftheverymassiveneutronstarinthej07406620binarysystem AT benvenutoomargustavo binaryevolutionleadingtotheformationoftheverymassiveneutronstarinthej07406620binarysystem AT devitomariaalejandra binaryevolutionleadingtotheformationoftheverymassiveneutronstarinthej07406620binarysystem
bdutipo_str	Repositorios
_version_	1764820451405594624

Binary evolution leading to the formation of the very massive neutron star in the J0740+6620 binary system

Ejemplares similares