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dc.date.accessioned | 2021-10-26T14:43:32Z | |
dc.date.available | 2021-10-26T14:43:32Z | |
dc.date.issued | 2013-03 | |
dc.identifier.uri | http://sedici.unlp.edu.ar/handle/10915/127272 | |
dc.description.abstract | We analysed the complete set of bursts from the neutron star low-mass X-ray binary 4U 1820-30 detected with the ossi X-ray Timing Explorer ( RXTE). We found that all are photospheric radius expansion bursts, and have similar duration, peak flux and fluence. From the analysis of time-resolved spectra during the cooling phase of the bursts, we found that the relation between the bolometric flux and the temperature is very different from the canonical F ∝ T⁴ relation which is expected if the apparent emitting area on the surface of the neutron star remains constant. The flux-temperature relation can be fitted using a broken power law, with indices ν₁ = 2.0 ± 0.3 and ν₂ = 5.72 ± 0.06. The departure from the F ∝ T⁴ relation during the cooling phase of the X-ray bursts in 4U 1820-30 could be due to changes in the emitting area of the neutron star while the atmosphere cools down, variations in the colour-correction factor due to chemical evolution, or the presence of a source of heat, e.g. residual hydrogen nuclear burning, playing an important role when the burst emission ceases. | en |
dc.format.extent | 3266-3271 | es |
dc.language | en | es |
dc.subject | stars: individual: 4U 1820−30 | es |
dc.subject | stars: neutron | es |
dc.subject | X-rays: binaries | es |
dc.subject | X-rays: bursts | es |
dc.title | The cooling phase of Type I X-ray bursts observed with RXTE in 4U 1820−30 does not follow the canonical F ∝ T⁴ relation | en |
dc.type | Articulo | es |
sedici.identifier.other | arXiv:1301.1035 | es |
sedici.identifier.other | doi:10.1093/mnras/sts583 | es |
sedici.identifier.issn | 0035-8711 | es |
sedici.identifier.issn | 1365-2966 | es |
sedici.creator.person | García, Federico | es |
sedici.creator.person | Zhang, Guobao | es |
sedici.creator.person | Méndez, Mariano R. | es |
sedici.subject.materias | Astronomía | es |
sedici.description.fulltext | true | es |
mods.originInfo.place | Facultad de Ciencias Astronómicas y Geofísicas | es |
mods.originInfo.place | Instituto Argentino de Radioastronomía | es |
sedici.subtype | Articulo | es |
sedici.rights.license | Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) | |
sedici.rights.uri | http://creativecommons.org/licenses/by-nc-sa/4.0/ | |
sedici.description.peerReview | peer-review | es |
sedici.relation.journalTitle | Monthly Notices of the Royal Astronomical Society | es |
sedici.relation.journalVolumeAndIssue | vol. 429, no. 4 | es |