The Magnificent Seven in the dusty prairie

B. Posselt, S. B. Popov, F. Haberl, J. Trümper, R. Turolla, R. Neuhäuser

Research output: Chapter in Book/Report/Conference proceedingChapter


The Magnificent Seven have all been discovered by their exceptional soft X-ray spectra and high ratios of X-ray to optical flux. They all are considered to be nearby sources. Searching for similar objects with larger distances, one expects larger interstellar absorption resulting in harder X-ray counterparts. Current interstellar absorption treatment depends on chosen abundances and scattering cross-sections of the elements as well as on the 3D distribution of the interstellar medium. After a discussion of these factors we use the comprehensive 3D measurements of the Local Bubble by Lallement et al. (2003, Astron. Astrophys. 411, 447) to construct two simple models of the 3D distribution of the hydrogen column density. We test these models by using a set of soft X-ray sources with known distances. Finally, we discuss possible applications for distance estimations and population synthesis studies.

Original languageEnglish (US)
Title of host publicationIsolated Neutron Stars
Subtitle of host publicationFrom The Surface To The Interior
PublisherSpringer Netherlands
Number of pages9
ISBN (Print)9781402059971
StatePublished - 2007

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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