Mass-loading of bow shock pulsar wind nebulae

We investigate the dynamics of bow shock nebulae created by pulsars moving supersonically through a partially ionized interstellar medium. A fraction of interstellar neutral hydrogen atoms penetrating into the tail region of a pulsar wind will undergo photo-ionization due to the UV light emitted by...

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Detalles Bibliográficos
Autores principales: Morlino, Giovanni, Lyutikov, Maxim, Vorster, Michael
Formato: Objeto de conferencia
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Astronómicas
bow shock nebulae
pulsars
ionized interstellar medium
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/167940
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-167940
record_format dspace
spelling I19-R120-10915-1679402024-07-11T20:03:08Z http://sedici.unlp.edu.ar/handle/10915/167940 Mass-loading of bow shock pulsar wind nebulae Morlino, Giovanni Lyutikov, Maxim Vorster, Michael 2015-10 2016 2024-07-11T13:11:25Z en Ciencias Astronómicas bow shock nebulae pulsars ionized interstellar medium We investigate the dynamics of bow shock nebulae created by pulsars moving supersonically through a partially ionized interstellar medium. A fraction of interstellar neutral hydrogen atoms penetrating into the tail region of a pulsar wind will undergo photo-ionization due to the UV light emitted by the nebula, with the resulting mass loading dramatically changing the flow dynamics of the light leptonic pulsar wind. Using a quasi 1-D hydrodynamic model of relativistic flow we find that if a relatively small density of neutral hydrogen, as low as 10⁻⁴ cm⁻³, penetrate inside the pulsar wind, this is sufficient to strongly affect the tail flow. Mass loading leads to the fast expansion of the pulsar wind tail, making the tail flow intrinsically non-stationary. The shapes predicted for the bow shock nebulae compare well with observations, both in Hα and X-rays. Facultad de Ciencias Astronómicas y Geofísicas Objeto de conferencia Objeto de conferencia http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf 73-80
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
bow shock nebulae
pulsars
ionized interstellar medium
spellingShingle Ciencias Astronómicas
bow shock nebulae
pulsars
ionized interstellar medium
Morlino, Giovanni
Lyutikov, Maxim
Vorster, Michael
Mass-loading of bow shock pulsar wind nebulae
topic_facet Ciencias Astronómicas
bow shock nebulae
pulsars
ionized interstellar medium
description We investigate the dynamics of bow shock nebulae created by pulsars moving supersonically through a partially ionized interstellar medium. A fraction of interstellar neutral hydrogen atoms penetrating into the tail region of a pulsar wind will undergo photo-ionization due to the UV light emitted by the nebula, with the resulting mass loading dramatically changing the flow dynamics of the light leptonic pulsar wind. Using a quasi 1-D hydrodynamic model of relativistic flow we find that if a relatively small density of neutral hydrogen, as low as 10⁻⁴ cm⁻³, penetrate inside the pulsar wind, this is sufficient to strongly affect the tail flow. Mass loading leads to the fast expansion of the pulsar wind tail, making the tail flow intrinsically non-stationary. The shapes predicted for the bow shock nebulae compare well with observations, both in Hα and X-rays.
format Objeto de conferencia
Objeto de conferencia
author Morlino, Giovanni
Lyutikov, Maxim
Vorster, Michael
author_facet Morlino, Giovanni
Lyutikov, Maxim
Vorster, Michael
author_sort Morlino, Giovanni
title Mass-loading of bow shock pulsar wind nebulae
title_short Mass-loading of bow shock pulsar wind nebulae
title_full Mass-loading of bow shock pulsar wind nebulae
title_fullStr Mass-loading of bow shock pulsar wind nebulae
title_full_unstemmed Mass-loading of bow shock pulsar wind nebulae
title_sort mass-loading of bow shock pulsar wind nebulae
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/167940
work_keys_str_mv AT morlinogiovanni massloadingofbowshockpulsarwindnebulae
AT lyutikovmaxim massloadingofbowshockpulsarwindnebulae
AT vorstermichael massloadingofbowshockpulsarwindnebulae
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