dc.contributor.author | Keek, L. | |
dc.contributor.author | Arzoumanian, Z. | |
dc.contributor.author | Bult, P. | |
dc.contributor.author | Cackett, E. M. | |
dc.contributor.author | Chenevez, J. | |
dc.contributor.author | Fabian, A. C. | |
dc.contributor.author | Gendreau, K. C. | |
dc.contributor.author | Guillot, S. | |
dc.contributor.author | Güver, T. | |
dc.contributor.author | Homan, J. | |
dc.contributor.author | Jaisawal, G. K. | |
dc.contributor.author | Lamb, F. K. | |
dc.contributor.author | Ludlam, R. M. | |
dc.contributor.author | Mahmoodifar, S. | |
dc.contributor.author | Markwardt, C. B. | |
dc.contributor.author | Miller, J. M. | |
dc.contributor.author | Soong, Y. | |
dc.contributor.author | Strohmayer, T. E. | |
dc.contributor.author | Wolff, M. T. | |
dc.contributor.author | Chakrabarty, Deepto | |
dc.contributor.author | Prigozhin, Gregory | |
dc.date.accessioned | 2019-03-18T15:05:16Z | |
dc.date.available | 2019-03-18T15:05:16Z | |
dc.date.issued | 2018-03 | |
dc.date.submitted | 2018-02 | |
dc.identifier.issn | 2041-8213 | |
dc.identifier.uri | http://hdl.handle.net/1721.1/121013 | |
dc.description.abstract | Accretion disks around neutron stars regularly undergo sudden strong irradiation by Type-I X-ray bursts powered by unstable thermonuclear burning on the stellar surface. We investigate the impact on the disk during one of the first X-ray burst observations with the Neutron Star Interior Composition Explorer (NICER) on the International Space Station. The burst is seen from Aql X-1 during the hard spectral state. In addition to thermal emission from the neutron star, the burst spectrum exhibits an excess of soft X-ray photons below 1 keV, where NICER's sensitivity peaks. We interpret the excess as a combination of reprocessing by the strongly photoionized disk and enhancement of the pre-burst persistent flux, possibly due to Poynting-Robertson drag or coronal reprocessing. This is the first such detection for a short sub-Eddington burst. As these bursts are observed frequently, NICER will be able to study how X-ray bursts affect the disk and corona for a range of accreting neutron star systems and disk states. Key words: accretion, accretion disks – stars: individual (Aql X-1) – stars: neutron – X-rays: binaries – X-rays:
bursts | en_US |
dc.description.sponsorship | National Science Foundation (U.S.) (Grant PHY-1430152) | en_US |
dc.description.sponsorship | United States. National Aeronautics and Space Administration | en_US |
dc.publisher | American Astronomical Society | en_US |
dc.relation.isversionof | http://dx.doi.org/10.3847/2041-8213/AAB104 | en_US |
dc.rights | Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. | en_US |
dc.source | The Astrophysical Journal Letters | en_US |
dc.title | NICER Observes the Effects of an X-Ray Burst on the Accretion Environment in Aql X-1 | en_US |
dc.type | Article | en_US |
dc.identifier.citation | Keek, L., Z. Arzoumanian, P. Bult, E. M. Cackett, D. Chakrabarty, J. Chenevez, A. C. Fabian, et al. “NICER Observes the Effects of an X-Ray Burst on the Accretion Environment in Aql X-1.” The Astrophysical Journal 855, no. 1 (February 28, 2018): L4. © 2018 The American Astronomical Society. | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Department of Physics | en_US |
dc.contributor.department | MIT Kavli Institute for Astrophysics and Space Research | en_US |
dc.contributor.mitauthor | Chakrabarty, Deepto | |
dc.contributor.mitauthor | Prigozhin, Gregory | |
dc.relation.journal | The Astrophysical Journal | en_US |
dc.eprint.version | Final published version | en_US |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
dc.date.updated | 2019-03-12T14:53:02Z | |
dspace.orderedauthors | Keek, L.; Arzoumanian, Z.; Bult, P.; Cackett, E. M.; Chakrabarty, D.; Chenevez, J.; Fabian, A. C.; Gendreau, K. C.; Guillot, S.; Güver, T.; Homan, J.; Jaisawal, G. K.; Lamb, F. K.; Ludlam, R. M.; Mahmoodifar, S.; Markwardt, C. B.; Miller, J. M.; Prigozhin, G.; Soong, Y.; Strohmayer, T. E.; Wolff, M. T. | en_US |
dspace.embargo.terms | N | en_US |
dc.identifier.orcid | https://orcid.org/0000-0001-8804-8946 | |
mit.license | PUBLISHER_POLICY | en_US |