FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2149594379> ?p ?o ?g. }

• W2149594379 endingPage "1082" @default.
• W2149594379 startingPage "1073" @default.
• W2149594379 abstract "<i>Context. <i/>The source 4U 2206+54 is one of the most enigmatic high-mass X-ray binaries. In spite of intensive searches, X-ray pulsations have not been detected in the time range 10<sup>-3<sup/>–10<sup>3<sup/> s. A cyclotron line at ~30 keV has been suggested by various authors but never detected with significance. The stellar wind of the optical companion is abnormally slow. The orbital period, initially reported to be 9.6 days, disappeared and a new periodicity of 19.25 days emerged.<i>Aims. <i/>The main objective of our RXTE monitoring of 4U 2206+54 is to study the X-ray orbital variability of the spectral and timing parameters. The new long and uninterrupted RXTE observations allow us to search for long (~1 h) pulsations for the first time. <i>Methods. <i/>We divided the ~7-day observation into five intervals and obtained time-averaged energy spectra and power spectral density for each observation interval. We also searched for pulsations using various algorithms.<i>Results. <i/>We have discovered 5560-s pulsations in the light curve of 4U 2206+54. Initially detected in RXTE data, these pulsations are also present in INTEGRAL and EXOSAT observations. The average X-ray luminosity in the energy range 2–10 keV is erg s<sup>-1<sup/> with a ratio . This ratio implies an eccentricity of ~0.4, somewhat higher than previously suggested. The power spectrum is dominated by red noise that can be fitted with a single power law whose index and strength decrease with X-ray flux. The source also shows a soft excess at low energies. If the soft excess is modelled with a blackbody component, then the size and temperature of the emitting region agrees with its interpretation in terms of a hot spot on the neutron star surface.<i>Conclusions. <i/>The discovery of X-ray pulsations in 4U 2206+54 confirms the neutron star nature of the compact companion and definitively rules out the presence of a black hole. The source displays variability on time scales of days, presumably due to changes in the mass accretion rate as the neutron star moves around the optical companion in a moderately eccentric orbit. If current models for the spin evolution in X-ray pulsars are correct, then the magnetic field of 4U 2206+54 at birth must have been G." @default.
• W2149594379 created "2016-06-24" @default.
• W2149594379 creator A5015202355 @default.
• W2149594379 creator A5015315882 @default.
• W2149594379 creator A5015472839 @default.
• W2149594379 creator A5036025727 @default.
• W2149594379 creator A5047547447 @default.
• W2149594379 creator A5079798281 @default.
• W2149594379 date "2008-12-11" @default.
• W2149594379 modified "2023-10-18" @default.
• W2149594379 title "Discovery of slow X-ray pulsations in the high-mass X-ray binary 4U 2206+54" @default.
• W2149594379 cites W1937275924 @default.
• W2149594379 cites W1970417976 @default.
• W2149594379 cites W1971128516 @default.
• W2149594379 cites W1974913150 @default.
• W2149594379 cites W1978765405 @default.
• W2149594379 cites W1979147878 @default.
• W2149594379 cites W1986242472 @default.
• W2149594379 cites W1988047233 @default.
• W2149594379 cites W1991181149 @default.
• W2149594379 cites W1998603019 @default.
• W2149594379 cites W2003481432 @default.
• W2149594379 cites W2010671365 @default.
• W2149594379 cites W2012270390 @default.
• W2149594379 cites W2017425741 @default.
• W2149594379 cites W2020166848 @default.
• W2149594379 cites W2024571707 @default.
• W2149594379 cites W2031197871 @default.
• W2149594379 cites W2038712570 @default.
• W2149594379 cites W2041497844 @default.
• W2149594379 cites W2042798485 @default.
• W2149594379 cites W2043534367 @default.
• W2149594379 cites W2056299947 @default.
• W2149594379 cites W2062198561 @default.
• W2149594379 cites W2067495139 @default.
• W2149594379 cites W2087572450 @default.
• W2149594379 cites W2107862238 @default.
• W2149594379 cites W2114931135 @default.
• W2149594379 cites W2115355545 @default.
• W2149594379 cites W2161414656 @default.
• W2149594379 cites W2169140809 @default.
• W2149594379 cites W3088345919 @default.
• W2149594379 cites W3099126036 @default.
• W2149594379 cites W3099183279 @default.
• W2149594379 cites W3099223098 @default.
• W2149594379 cites W3100847847 @default.
• W2149594379 cites W3100850549 @default.
• W2149594379 cites W3101347870 @default.
• W2149594379 cites W3101654263 @default.
• W2149594379 cites W3101971008 @default.
• W2149594379 cites W3103026706 @default.
• W2149594379 cites W3105131538 @default.
• W2149594379 cites W3105905232 @default.
• W2149594379 cites W3106309084 @default.
• W2149594379 cites W3106343655 @default.
• W2149594379 cites W3106536624 @default.
• W2149594379 cites W4298092355 @default.
• W2149594379 doi "https://doi.org/10.1051/0004-6361:200810950" @default.
• W2149594379 hasPublicationYear "2008" @default.
• W2149594379 type Work @default.
• W2149594379 sameAs 2149594379 @default.
• W2149594379 citedByCount "32" @default.
• W2149594379 countsByYear W21495943792012 @default.
• W2149594379 countsByYear W21495943792013 @default.
• W2149594379 countsByYear W21495943792014 @default.
• W2149594379 countsByYear W21495943792015 @default.
• W2149594379 countsByYear W21495943792016 @default.
• W2149594379 countsByYear W21495943792017 @default.
• W2149594379 countsByYear W21495943792018 @default.
• W2149594379 countsByYear W21495943792019 @default.
• W2149594379 countsByYear W21495943792020 @default.
• W2149594379 countsByYear W21495943792021 @default.
• W2149594379 countsByYear W21495943792022 @default.
• W2149594379 crossrefType "journal-article" @default.
• W2149594379 hasAuthorship W2149594379A5015202355 @default.
• W2149594379 hasAuthorship W2149594379A5015315882 @default.
• W2149594379 hasAuthorship W2149594379A5015472839 @default.
• W2149594379 hasAuthorship W2149594379A5036025727 @default.
• W2149594379 hasAuthorship W2149594379A5047547447 @default.
• W2149594379 hasAuthorship W2149594379A5079798281 @default.
• W2149594379 hasBestOaLocation W21495943791 @default.
• W2149594379 hasConcept C121332964 @default.
• W2149594379 hasConcept C12287442 @default.
• W2149594379 hasConcept C1276947 @default.
• W2149594379 hasConcept C130726490 @default.
• W2149594379 hasConcept C137179401 @default.
• W2149594379 hasConcept C150846664 @default.
• W2149594379 hasConcept C151730666 @default.
• W2149594379 hasConcept C192887742 @default.
• W2149594379 hasConcept C2779343474 @default.
• W2149594379 hasConcept C32224563 @default.
• W2149594379 hasConcept C33923547 @default.
• W2149594379 hasConcept C44870925 @default.
• W2149594379 hasConcept C48372109 @default.
• W2149594379 hasConcept C4839761 @default.
• W2149594379 hasConcept C86803240 @default.
• W2149594379 hasConcept C94375191 @default.
• W2149594379 hasConcept C98444146 @default.

• next