Galactic pulsar with proper motions Virtual Observatory Resource

Authors
  1. Ronchi M.
  2. Graber V.
  3. Garcia-Garcia A.
  4. Rea N.
  5. Pons J.A.
  6. Published by
    CDS
Abstract

We explore the possibility of inferring the properties of the Galactic population of neutron stars through machine learning. In particular, in this paper we focus on their dynamical characteristics and show that an artificial neural network is able to estimate with high accuracy the parameters that control the current positions of a mock population of pulsars. For this purpose, we implement a simplified population-synthesis framework (where selection biases are neglected at this stage) and concentrate on the natal kick-velocity distribution and the distribution of birth distances from the Galactic plane. By varying these and evolving the pulsar trajectories in time, we generate a series of simulations that are used to train and validate a suitably structured convolutional neural network. We demonstrate that our network is able to recover the parameters governing the distribution of kick velocity and Galactic height with a mean relative error of about 10^-2^. We discuss the limitations of our idealized approach and study a toy problem to introduce selection effects in a phenomenological way by incorporating the observed proper motions of 216 isolated pulsars. Our analysis highlights that by increasing the sample of pulsars with accurate proper-motion measurements by a factor of ~10, one of the future breakthroughs of the Square Kilometre Array, we might succeed in constraining the birth spatial and kick-velocity distribution of the neutron stars in the Milky Way with high precision through machine learning.

Keywords
  1. pulsars
  2. proper-motions
  3. stellar-distance
  4. neutron-stars
  5. visible-astronomy
  6. trigonometric-parallax
Bibliographic source Bibcode
2021ApJ...916..100R
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/916/100
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/916/100
Document Object Identifer DOI
doi:10.26093/cds/vizier.19160100

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/916/100
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/916/100
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/916/100
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/916/100/table5?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/916/100/table5?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/916/100/table5?

History

2023-01-26T14:31:43Z
Resource record created
2023-01-26T14:31:43Z
Created
2023-02-15T07:46:27Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr