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Submillimetre observations of RXJ1856.5-3754
- 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.
Document Type: | Article |
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Language: | English |
Author: | B. Posselt, K. Schreyer, R. Perna, M. W. Sommer, B. Klein, P. Slane |
Parent Title (English): | MNRAS (Monthly Notices of the Royal Astronomical Society) |
Volume: | 405 |
Issue: | 3 |
First Page: | 1840 |
Last Page: | 1844 |
ISSN: | 0035-8711 |
DOI: | https://doi.org/10.1111/j.1365-2966.2010.16557.x |
Publisher: | Oxford University Press |
Date of first publication: | 2010/07/01 |
Keyword: | circumstellar matter; stars: individual: RXJ1856.5-3754 |
Departments, institutes and facilities: | Fachbereich Ingenieurwissenschaften und Kommunikation |
Dewey Decimal Classification (DDC): | 5 Naturwissenschaften und Mathematik / 52 Astronomie / 520 Astronomie und zugeordnete Wissenschaften |
Entry in this database: | 2015/10/09 |