THE WHITE DWARF COMPANION OF A 2 M ☉ NEUTRON STAR

THE WHITE DWARF COMPANION OF A 2 M ☉ NEUTRON STAR

We report the optical discovery of the companion to the 2 M millisecond pulsar PSR J1614--2230. The optical colors show that the 0.5 M companion is a 2.2 Gyr old He-CO white dwarf. We infer that during the accretion phase is . We show that the pulsar was born with a spin close to its current value,...

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Veröffentlicht in:Astrophysical journal. Letters 2011-08, Vol.737 (1), p.L1-jQuery1323916291473='48'
Hauptverfasser: Bhalerao, Varun B., Kulkarni, S. R.
Format: Artikel
Sprache:eng
Schlagworte:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
COSMIC RADIO SOURCES
DWARF STARS
NEUTRON STARS
PULSARS
STARS
WHITE DWARF STARS
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Zusammenfassung:We report the optical discovery of the companion to the 2 M millisecond pulsar PSR J1614--2230. The optical colors show that the 0.5 M companion is a 2.2 Gyr old He-CO white dwarf. We infer that during the accretion phase is . We show that the pulsar was born with a spin close to its current value, well below the rebirth line. The spin-down parameters, the mass of the pulsar, and the age of the system challenge the simple recycling model for the formation of millisecond pulsars.
ISSN:2041-8205
2041-8213
DOI:10.1088/2041-8205/737/1/L1