2020MNRAS.493..713A


Query : 2020MNRAS.493..713A

2020MNRAS.493..713A - Mon. Not. R. Astron. Soc., 493, 713-722 (2020/March-3)

Classification of pulsars with Dirichlet process Gaussian mixture model.

AY F., INCE G., KAMASAK M.E. and EKSI K.Y.

Abstract (from CDS):

Young isolated neutron stars (INSs) most commonly manifest themselves as rotationally powered pulsars that involve conventional radio pulsars as well as gamma-ray pulsars and rotating radio transients. Some other young INS families manifest themselves as anomalous X-ray pulsars and soft gamma-ray repeaters that are commonly accepted as magnetars, i.e. magnetically powered neutron stars with decaying super-strong fields. Yet some other young INSs are identified as central compact objects and X-ray dim isolated neutron stars that are cooling objects powered by their thermal energy. Older pulsars, as a result of a previous long episode of accretion from a companion, manifest themselves as millisecond pulsars and more commonly appear in binary systems. We use Dirichlet process Gaussian mixture model (DPGMM), an unsupervised machine learning algorithm, for analysing the distribution of these pulsar families in the parameter space of period and period derivative. We compare the average values of the characteristic age, magnetic dipole field strength, surface temperature, and transverse velocity of all discovered clusters. We verify that DPGMM is robust and provide hints for inferring relations between different classes of pulsars. We discuss the implications of our findings for the magnetothermal spin evolution models and fallback discs.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: data analysis - methods: statistical - stars: neutron - pulsars: general

Simbad objects: 13

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Number of rows : 13
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 PSR B0154+61 Psr 01 57 49.930 +62 12 25.90           ~ 113 0
2 NAME Sgr J0418+5729 gam 04 18 33.867 +57 32 22.91           ~ 195 0
3 RX J0720.4-3125 N* 07 20 24.961 -31 25 50.21   26.1   27.0   ~ 288 0
4 PSR J1119-6127 Psr 11 19 14.30 -61 27 49.5           ~ 352 1
5 RX J1308.8+2127 N*? 13 08 48.7 +21 27 08   28.6 28.6     ~ 147 1
6 PSR B1509-58 Psr 15 13 55.52 -59 08 08.8     13.06     ~ 806 1
7 AJG 44 Psr 16 17 33.000 -51 02 00.00           ~ 471 3
8 2E 3623 X 16 17 36.30 -51 02 26.6           ~ 94 1
9 PSR J1647-4552 Psr 16 47 10.18 -45 52 16.7           ~ 182 1
10 PSR B1811-17.7 Psr 18 14 43.10 -17 44 48.0           ~ 70 0
11 1WGA J1822.2-1604 X 18 22 18.32 -16 04 27.2           ~ 115 0
12 PSR J1847-0130 Psr 18 47 35.2 -01 30 46           ~ 40 0
13 2E 4673 HXB 23 01 08.14 +58 52 44.5           ~ 599 1

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2021.08.04-14:52:44

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