FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2912561686> ?p ?o ?g. }

• W2912561686 endingPage "81" @default.
• W2912561686 startingPage "81" @default.
• W2912561686 abstract "We present new, contemporaneous HST STIS and XMM observations of the O7 III(n)((f)) star xi Per. We supplement the new data with archival IUE spectra, to analyze the variability of the wind lines and X-ray flux of xi Pper. The variable wind of this star is known to have a 2.086 day periodicity. We use a simple, heuristic spot model which fits the low velocity (near surface) IUE wind line variability very well, to demonstrate that the low velocity absorption in the new STIS spectra of N IV 1718 and Si IV 1402 vary with the same 2.086 day period. It is remarkable that the period and amplitude of the STIS data agree with those of the IUE spectra obtained 22 years earlier. We also show that the time variability of the new XMM fluxes are also consistent with the 2.086 day period. Thus, our new, multi-wavelength coordinated observations demonstrate that the mechanism which causes the UV wind line variability is also responsible for a significant fraction of the X-rays in single O stars. The sequence of events for the multi-wavelength light curve minima is: Si IV 1402, N IV 1718, and X-ray flux, each separated by a phase of about 0.06 relative to the 2.086 day period. Analysis of the X-ray fluxes shows that they become softer as they weaken. This is contrary to expectations if the variability is caused by periodic excess absorption. Further, the high resolution X-ray spectra suggest that the individual emission lines at maximum are more strongly blue shifted. If we interpret the low velocity wind line light curves in terms of our model, it implies that there are two bright regions, i.e., regions with less absorption, separated by 180 deg, on the surface of the star. We note that the presence and persistent of two spots separated by 180 deg suggests that a weak dipole magnetic field is responsible for the variability of the UV wind line absorption and X-ray flux in xi Per." @default.
• W2912561686 created "2019-02-21" @default.
• W2912561686 creator A5028642035 @default.
• W2912561686 creator A5054983875 @default.
• W2912561686 creator A5059798421 @default.
• W2912561686 creator A5066422983 @default.
• W2912561686 date "2019-03-06" @default.
• W2912561686 modified "2023-10-01" @default.
• W2912561686 title "Coordinated UV and X-Ray Spectroscopic Observations of the O-type Giant <i>ξ</i> Per: The Connection between X-Rays and Large-scale Wind Structure" @default.
• W2912561686 cites W1757987097 @default.
• W2912561686 cites W1967476931 @default.
• W2912561686 cites W1974764678 @default.
• W2912561686 cites W1977725692 @default.
• W2912561686 cites W1986675427 @default.
• W2912561686 cites W1989199175 @default.
• W2912561686 cites W2000307147 @default.
• W2912561686 cites W2001756230 @default.
• W2912561686 cites W2028733429 @default.
• W2912561686 cites W2034631799 @default.
• W2912561686 cites W2047940588 @default.
• W2912561686 cites W2055625862 @default.
• W2912561686 cites W2071028813 @default.
• W2912561686 cites W2081433139 @default.
• W2912561686 cites W2087000175 @default.
• W2912561686 cites W2099442838 @default.
• W2912561686 cites W2105577713 @default.
• W2912561686 cites W2105903052 @default.
• W2912561686 cites W2110555593 @default.
• W2912561686 cites W2117034571 @default.
• W2912561686 cites W2126724012 @default.
• W2912561686 cites W2128291589 @default.
• W2912561686 cites W2139110327 @default.
• W2912561686 cites W2154078330 @default.
• W2912561686 cites W2166400669 @default.
• W2912561686 cites W2167788806 @default.
• W2912561686 cites W2168688449 @default.
• W2912561686 cites W2800621674 @default.
• W2912561686 cites W2903862576 @default.
• W2912561686 cites W3098370426 @default.
• W2912561686 cites W3098570360 @default.
• W2912561686 cites W3099186123 @default.
• W2912561686 cites W3099398191 @default.
• W2912561686 cites W3100027325 @default.
• W2912561686 cites W3100260909 @default.
• W2912561686 cites W3101340166 @default.
• W2912561686 cites W3101477521 @default.
• W2912561686 cites W3102808992 @default.
• W2912561686 cites W3103020419 @default.
• W2912561686 cites W3103144565 @default.
• W2912561686 cites W3104697504 @default.
• W2912561686 cites W3106263766 @default.
• W2912561686 cites W3123112321 @default.
• W2912561686 cites W4237786902 @default.
• W2912561686 cites W4296509934 @default.
• W2912561686 cites W4297900718 @default.
• W2912561686 cites W4299584207 @default.
• W2912561686 cites W4300237569 @default.
• W2912561686 cites W4303098660 @default.
• W2912561686 doi "https://doi.org/10.3847/1538-4357/ab0283" @default.
• W2912561686 hasPublicationYear "2019" @default.
• W2912561686 type Work @default.
• W2912561686 sameAs 2912561686 @default.
• W2912561686 citedByCount "8" @default.
• W2912561686 countsByYear W29125616862020 @default.
• W2912561686 countsByYear W29125616862021 @default.
• W2912561686 countsByYear W29125616862022 @default.
• W2912561686 crossrefType "journal-article" @default.
• W2912561686 hasAuthorship W2912561686A5028642035 @default.
• W2912561686 hasAuthorship W2912561686A5054983875 @default.
• W2912561686 hasAuthorship W2912561686A5059798421 @default.
• W2912561686 hasAuthorship W2912561686A5066422983 @default.
• W2912561686 hasBestOaLocation W29125616861 @default.
• W2912561686 hasConcept C120665830 @default.
• W2912561686 hasConcept C121332964 @default.
• W2912561686 hasConcept C125287762 @default.
• W2912561686 hasConcept C1276947 @default.
• W2912561686 hasConcept C130726490 @default.
• W2912561686 hasConcept C150846664 @default.
• W2912561686 hasConcept C180205008 @default.
• W2912561686 hasConcept C191897082 @default.
• W2912561686 hasConcept C192562407 @default.
• W2912561686 hasConcept C198352243 @default.
• W2912561686 hasConcept C2524010 @default.
• W2912561686 hasConcept C33923547 @default.
• W2912561686 hasConcept C44870925 @default.
• W2912561686 hasConcept C4839761 @default.
• W2912561686 hasConcept C6260449 @default.
• W2912561686 hasConcept C68709404 @default.
• W2912561686 hasConceptScore W2912561686C120665830 @default.
• W2912561686 hasConceptScore W2912561686C121332964 @default.
• W2912561686 hasConceptScore W2912561686C125287762 @default.
• W2912561686 hasConceptScore W2912561686C1276947 @default.
• W2912561686 hasConceptScore W2912561686C130726490 @default.
• W2912561686 hasConceptScore W2912561686C150846664 @default.
• W2912561686 hasConceptScore W2912561686C180205008 @default.
• W2912561686 hasConceptScore W2912561686C191897082 @default.
• W2912561686 hasConceptScore W2912561686C192562407 @default.
• W2912561686 hasConceptScore W2912561686C198352243 @default.

• next