A follow-up optical investigation of the binary pulsar PSR J1811-1736

Details A follow-up optical investigation of the binary pulsar PSR J1811-1736 A follow-up optical investigation of the binary pulsar PSR J1811-1736

Jun 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...358l..53m&link_type=abstract

Astronomy and Astrophysics, v.358, p.L53-L54 (2000)

Astronomy and Astrophysics

Astrophysics

4

Stars: Pulsars: Individual: Psr J1811-1736, Stars: Binaries: General

Scientific paper

PSR J1811-1736 (P = 104 ms) is a binary pulsar in a highly eccentric orbit (P_orb= 18.8 d) around an unidentified companion. Here, an optical follow-up investigation of the pulsar field, performed using photographic plates from the UK-SERC Equatorial red survey, is reported. No object is detected at the pulsar position down to R ~ 22. At the pulsar distance of 6 kpc, this implies, for a likely value of A_R (~ 5), an absolute magnitude M_R >= 3 for the companion star. Although the present upper limit is deep enough to rule out a red giant, it still leaves open the possibility of a main sequence star or a red dwarf companion. Deeper optical observations are thus required to investigate the presence of white dwarf or a neutron star.

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