The puzzles of RX J1856.5-3754: neutron star or quark star?
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| Title: | The puzzles of RX J1856.5-3754: neutron star or quark star? |
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| Authors: | Trümper, J.E.1, Burwitz, V.1, Haberl, F.1, Zavlin, V.E.1 |
| Source: | Nuclear Physics B Proceedings Supplement. Jun2004, Vol. 132 Issue 1-3, p560-565. 6p. |
| Subjects: | Neutron stars, Pulsars, Magnetic fields, Spectrum analysis |
| Abstract: | We discuss recent Chandra and XMM-Newton observations of the bright isolated neutron star RX J1856.5–3754 and suggest that the absence of any line features is due to effects of a high magnetic field strength (∼1013G). Using different models for the temperature distribution across the neutron star surface and assuming blackbody emission to fit the optical and X-ray spectrum, we derive a conservative lower limit of the "apparent“ neutron star radius of 16.5 km × (d/117 pc). This corresponds to the radius for the ”true“ (de-redshifted) radius of 14 km for a 1.4 M◎ neutron star, indicating a stiff equation of state at high densities. A comparison of the result with mass-radius diagrams shows that quark stars and neutron stars with quark matter cores can be ruled out with high confidence. [Copyright &y& Elsevier] |
| Copyright of Nuclear Physics B Proceedings Supplement is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 13434698 AccessLevel: 6 PubType: Periodical PubTypeId: serialPeriodical PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: The puzzles of RX J1856.5-3754: neutron star or quark star? – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Trümper%2C+J%2EE%2E%22">Trümper, J.E.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Burwitz%2C+V%2E%22">Burwitz, V.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Haberl%2C+F%2E%22">Haberl, F.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Zavlin%2C+V%2EE%2E%22">Zavlin, V.E.</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nuclear+Physics+B++Proceedings+Supplement%22">Nuclear Physics B Proceedings Supplement</searchLink>. Jun2004, Vol. 132 Issue 1-3, p560-565. 6p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Neutron+stars%22">Neutron stars</searchLink><br /><searchLink fieldCode="DE" term="%22Pulsars%22">Pulsars</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+fields%22">Magnetic fields</searchLink><br /><searchLink fieldCode="DE" term="%22Spectrum+analysis%22">Spectrum analysis</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: We discuss recent Chandra and XMM-Newton observations of the bright isolated neutron star RX J1856.5–3754 and suggest that the absence of any line features is due to effects of a high magnetic field strength (∼1013G). Using different models for the temperature distribution across the neutron star surface and assuming blackbody emission to fit the optical and X-ray spectrum, we derive a conservative lower limit of the "apparent“ neutron star radius of 16.5 km × (d/117 pc). This corresponds to the radius for the ”true“ (de-redshifted) radius of 14 km for a 1.4 M◎ neutron star, indicating a stiff equation of state at high densities. A comparison of the result with mass-radius diagrams shows that quark stars and neutron stars with quark matter cores can be ruled out with high confidence. [Copyright &y& Elsevier] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nuclear Physics B Proceedings Supplement is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.nuclphysbps.2004.04.094 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 6 StartPage: 560 Subjects: – SubjectFull: Neutron stars Type: general – SubjectFull: Pulsars Type: general – SubjectFull: Magnetic fields Type: general – SubjectFull: Spectrum analysis Type: general Titles: – TitleFull: The puzzles of RX J1856.5-3754: neutron star or quark star? Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Trümper, J.E. – PersonEntity: Name: NameFull: Burwitz, V. – PersonEntity: Name: NameFull: Haberl, F. – PersonEntity: Name: NameFull: Zavlin, V.E. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun2004 Type: published Y: 2004 Identifiers: – Type: issn-print Value: 09205632 Numbering: – Type: volume Value: 132 – Type: issue Value: 1-3 Titles: – TitleFull: Nuclear Physics B Proceedings Supplement Type: main |
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