@article{PosseltSchreyerPernaetal.2010, author = {B. Posselt and K. Schreyer and R. Perna and M. W. Sommer and B. Klein and P. Slane}, title = {Submillimetre observations of RXJ1856.5-3754}, series = {MNRAS (Monthly Notices of the Royal Astronomical Society)}, volume = {405}, number = {3}, publisher = {Oxford University Press}, issn = {0035-8711}, doi = {10.1111/j.1365-2966.2010.16557.x}, pages = {1840 -- 1844}, year = {2010}, abstract = {We report on submillimetre bolometer observations of the isolated neutron star RX J1856.5−3754 using the Large Apex Bolometer Camera bolometer array on the Atacama Pathfinder Experiment telescope. No cold dust continuum emission peak at the position of RX J1856.5−3754 was detected. The 3σ flux density upper limit of 5 mJy translates into a cold dust mass limit of a few earth masses. We use the new submillimetre limit, together with a previously obtained H-band limit, to constrain the presence of a gaseous, circumpulsar disc. Adopting a simple irradiated disc model, we obtain a mass accretion limit of Graphic and a maximum outer disc radius of ∼1014 cm. By examining the projected proper motion of RX J1856.5−3754, we speculate about a possible encounter of the neutron star with a dense fragment of the CrA molecular cloud a few thousand years ago.}, language = {en} }