Bibcode
Kirichenko, A. Yu; Zharikov, S. V.; Zyuzin, D. A.; Shibanov, Yu A.; Karpova, A. V.; Dai, S.; Cabrera Lavers, A.
Bibliographical reference
Monthly Notices of the Royal Astronomical Society, Volume 480, Issue 2, p.1950-1955
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10
2018
Citations
5
Refereed citations
4
Description
We report detection of the binary companion to the millisecond pulsar
J2302+4442 based on the deep observations performed with the Gran
Telescopio Canarias. The observations revealed an optical source with r'
= 23.33 ± 0.02 and i' = 23.08 ± 0.02, whose position
coincides with the pulsar radio position. By comparing the source colour
and magnitudes with the white dwarf cooling predictions, we found that
it likely represents an He or CO-core white dwarf and estimated its mass
of 0.52^{+0.25}_{-0.19} M⊙ and effective temperature of
6300^{+1000}_{-800} K. Combining our results with the radio timing
measurements, we set constraints on the binary system inclination angle
i = 73^{+6}_{-5} deg and the pulsar mass m_ p = 3.1^{+2.7}_{-2.0}
M⊙.
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