2018A&A...612A..78O


Query : 2018A&A...612A..78O

2018A&A...612A..78O - Astronomy and Astrophysics, volume 612A, 78-78 (2018/4-1)

PSR J1618-3921: a recycled pulsar in an eccentric orbit.

OCTAU F., COGNARD I., GUILLEMOT L., TAURIS T.M., FREIRE P.C.C., DESVIGNES G. and THEUREAU G.

Abstract (from CDS):


Context. The 11.99ms pulsar PSR J1618-3921 orbits a He white dwarf companion of probably low mass with a period of 22.7d. The pulsar was discovered in a survey of the intermediate Galactic latitudes at 1400MHz that was conducted with the Parkes radio telescope in the late 1990s. Although PSR J1618-3921 was discovered more than 15 years ago, only limited information has been published about this pulsar, which has a surprisingly high orbital eccentricity (e∼0.027) considering its high spin frequency and the likely low mass of the companion.
Aims. The focus of this work is a precise measurement of the spin and the astrometric and orbital characteristics of PSR J1618-3921. This was done with timing observations made at the Nancay Radio Telescope from 2009 to 2017.
Methods. We analyzed the timing data recorded at the Nancay Radio Telescope over several years to characterize the properties of PSR J1618-3921. A rotation ephemeris for this pulsar was obtained by analyzing the arrival times of the radio pulses at the telescope.
Results. We confirm the unusual eccentricity of PSR J1618-3921 and discuss several hypotheses regarding its formation in the context of other discoveries of recycled pulsars in eccentric orbits.

Abstract Copyright: © ESO 2018

Journal keyword(s): pulsars: individual: PSR J1618-3921 - ephemerides

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 PSR J0955-6150 Psr 09 55 39.0 -61 48 36           ~ 28 0
2 PSR J1421-4409 Psr 14 21 20.9646 -44 09 04.541           ~ 9 0
3 PSR J1618-3919 Psr 16 18 30 -39 19.0           ~ 29 0
4 PSR J1903+0327 Psr 19 03 05.7937 +03 27 19.222           ~ 158 1
5 PSR J1946+3417 Psr 19 46 25.13182 +34 17 14.6770           ~ 48 0
6 PSR J1950+2414 Psr 19 50 45.06390 +24 14 56.9638           ~ 29 0
7 PSR J2234+06 Psr 22 34 22 +06 11.0           ~ 54 0

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