Searching for old neutron stars with ROSAT. I. Soft X-ray sources in molecular clouds at high galactic latitude

Details Searching for old neutron stars with ROSAT. I. Soft X-ray sources in molecular clouds at high galactic latitude Searching for old neutron stars with ROSAT. I. Soft X-ray sources in molecular clouds at high galactic latitude

Mar 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26as..128..331d&link_type=abstract

Astronomy and Astrophysics Supplement, v.128, p.331-348

Astronomy and Astrophysics

Astrophysics

10

Surveys, Stars: Neutron, White Dwarfs, X-Rays: Stars, Radio Continuum: Stars

Scientific paper

This is the first in a series of three papers aiming to put strong observational constraints on the number of old accreting neutron stars in the Galaxy. Old neutron stars have been predicted to be visible as soft X-ray sources. The brightest sources are expected where the density of the interstellar medium is high. I present an X-ray survey of a complete sample of molecular clouds at high galactic latitudes based on the ROSAT All-Sky Survey. I detect 89 sources inside the projected contours of the molecular clouds and report on a comprehensive identification program. For all sources I searched astronomical catalogs and created finding charts. I also observed all sources at radio frequencies, most of them at 1.4GHz and at 8GHz. For sources with bright counterparts, optical spectra are presented. For fainter sources, optical CCD images are shown. Of all sources, 54 are securely identified and for the majority of the remaining sources likely identifications are given. I find no candidate for an old accreting neutron star in this sample. From this survey I derive an upper limit to the neutron star density of 50sr(-1) at a ROSAT count rate of 0.012s(-1) . Fig.\,9 and Fig.\,10 are only and Table\,2 is additionally available in electronic form at the CDS via http://cdsweb.u-strasbg.fr/Abstract.html

Affiliated with

Also associated with

No associations

Rating

Searching for old neutron stars with ROSAT. I. Soft X-ray sources in molecular clouds at high galactic latitude does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Searching for old neutron stars with ROSAT. I. Soft X-ray sources in molecular clouds at high galactic latitude, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Searching for old neutron stars with ROSAT. I. Soft X-ray sources in molecular clouds at high galactic latitude will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1655906