SIMBAD references

2003ApJ...598..458R - Astrophys. J., 598, 458-473 (2003/November-3)

A limit on the number of isolated neutron stars detected in the ROSAT bright source catalogue.


Abstract (from CDS):

The challenge in searching for non-radio-pulsing isolated neutron stars (INSs) is in excluding association with objects in the very large error boxes (∼13", 1 σ radius) typical of sources from the largest X-ray all-sky survey, the ROSAT All-Sky Survey Bright Source Catalogue (RASS BSC). We search for candidate INSs using statistical analysis of optical (USNO-A2), infrared (IRAS), and radio (NVSS) sources near the ROSAT X-ray localization and show that this selection would find 20% of the INSs in the RASS BSC. This selection finds 32 candidates at declinations δ>-39°, among which are two previously known INSs, 17 sources that we show are not INSs, and 13 the classification of which are as yet undetermined. These results require a limit of less than 67 INSs (90% confidence, full sky, assuming isotropy) in the RASS BSC. This limit modestly constrains a naive and optimistic model for cooling neutron stars in the Galaxy.

Abstract Copyright:

Journal keyword(s): Stars: Neutron - X-Rays: Stars

Simbad objects: 43

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