Matches in SemOpenAlex for { <https://semopenalex.org/work/W3043370888> ?p ?o ?g. }
Showing items 1 to 76 of
76
with 100 items per page.
- W3043370888 startingPage "29" @default.
- W3043370888 abstract "During intensive/comparative studies with Preston's spectroscopic works (1961, 1962, 1964 & 1965) on RR Lyrae atmospheric phenomena, I unexpectedly found the existence of hypersonic shock waves (Chadid 1996 & 2008), that are strongly connected with the turbulence amplification mechanism (Chadid 1996b) and the Blazhko modulation (1997). Here I will show how the hypersonic shocks are at the origin of helium line formation and connected with the helium emission and line doubling detected by Preston (2009, 2011). I will present new neutral and single ionized helium line data in the hypersonic Blazhko star S Arae. The He II appears as a weak emission and its origin is strongly connected with the hypersonic shock in S Arae. The shock is extremely strong and can reach a Mach number >30. The HeI lines first appear in emission, over ~2% of the pulsation period, followed by the HeI absorption doubling phenomenon occurring simultaneously with the neutral metallic absorption line phenomenon over ~8% of the pulsation period. Despite several claimed detections of magnetic fields in RR Lyrae, Preston (1967) found none after two years of observations. This is consistent with my recent spectro-polarimetric measurements (2004), over four years, concluding that RR Lyr is a bona fide nonmagnetic star, leading to the falsification of all the models of the Blazhko effect requiring strong photospheric magnetic fields. I report on a new series of high precision circular polarization spectroscopic observations of Blazhko star RV UMa. The longitudinal field measurements of RV UMa show a mean longitudinal magnetic field of B_l = -13+/-35 G, and no significant detection over the entire pulsation cycle. These spectroscopic results reveal a serious challenge for explaining the complex behavior in the pulsation of hypersonic atmospheres of RR Lyrae stars." @default.
- W3043370888 created "2020-07-23" @default.
- W3043370888 creator A5091787520 @default.
- W3043370888 date "2011-08-01" @default.
- W3043370888 modified "2023-09-27" @default.
- W3043370888 title "Atmospheres of RR Lyrae Stars: Hypersonic Shock waves, Helium line detection and Magnetic fields. A few spectra for George Preston on the occasion of his birthday" @default.
- W3043370888 hasPublicationYear "2011" @default.
- W3043370888 type Work @default.
- W3043370888 sameAs 3043370888 @default.
- W3043370888 citedByCount "0" @default.
- W3043370888 crossrefType "journal-article" @default.
- W3043370888 hasAuthorship W3043370888A5091787520 @default.
- W3043370888 hasConcept C113461152 @default.
- W3043370888 hasConcept C115260700 @default.
- W3043370888 hasConcept C121332964 @default.
- W3043370888 hasConcept C122824865 @default.
- W3043370888 hasConcept C1276947 @default.
- W3043370888 hasConcept C150846664 @default.
- W3043370888 hasConcept C165231844 @default.
- W3043370888 hasConcept C172338258 @default.
- W3043370888 hasConcept C184779094 @default.
- W3043370888 hasConcept C198352243 @default.
- W3043370888 hasConcept C2524010 @default.
- W3043370888 hasConcept C33923547 @default.
- W3043370888 hasConcept C44870925 @default.
- W3043370888 hasConcept C4839761 @default.
- W3043370888 hasConcept C546029482 @default.
- W3043370888 hasConcept C57879066 @default.
- W3043370888 hasConcept C62520636 @default.
- W3043370888 hasConcept C70477161 @default.
- W3043370888 hasConceptScore W3043370888C113461152 @default.
- W3043370888 hasConceptScore W3043370888C115260700 @default.
- W3043370888 hasConceptScore W3043370888C121332964 @default.
- W3043370888 hasConceptScore W3043370888C122824865 @default.
- W3043370888 hasConceptScore W3043370888C1276947 @default.
- W3043370888 hasConceptScore W3043370888C150846664 @default.
- W3043370888 hasConceptScore W3043370888C165231844 @default.
- W3043370888 hasConceptScore W3043370888C172338258 @default.
- W3043370888 hasConceptScore W3043370888C184779094 @default.
- W3043370888 hasConceptScore W3043370888C198352243 @default.
- W3043370888 hasConceptScore W3043370888C2524010 @default.
- W3043370888 hasConceptScore W3043370888C33923547 @default.
- W3043370888 hasConceptScore W3043370888C44870925 @default.
- W3043370888 hasConceptScore W3043370888C4839761 @default.
- W3043370888 hasConceptScore W3043370888C546029482 @default.
- W3043370888 hasConceptScore W3043370888C57879066 @default.
- W3043370888 hasConceptScore W3043370888C62520636 @default.
- W3043370888 hasConceptScore W3043370888C70477161 @default.
- W3043370888 hasLocation W30433708881 @default.
- W3043370888 hasOpenAccess W3043370888 @default.
- W3043370888 hasPrimaryLocation W30433708881 @default.
- W3043370888 hasRelatedWork W1512879453 @default.
- W3043370888 hasRelatedWork W1634551242 @default.
- W3043370888 hasRelatedWork W1968776264 @default.
- W3043370888 hasRelatedWork W1998924990 @default.
- W3043370888 hasRelatedWork W2029402241 @default.
- W3043370888 hasRelatedWork W2051459707 @default.
- W3043370888 hasRelatedWork W2054415803 @default.
- W3043370888 hasRelatedWork W2071666852 @default.
- W3043370888 hasRelatedWork W2157957408 @default.
- W3043370888 hasRelatedWork W2952429701 @default.
- W3043370888 hasRelatedWork W3001673216 @default.
- W3043370888 hasRelatedWork W3083337985 @default.
- W3043370888 hasRelatedWork W3102515116 @default.
- W3043370888 hasRelatedWork W3121536661 @default.
- W3043370888 hasRelatedWork W3123711054 @default.
- W3043370888 hasRelatedWork W3135429371 @default.
- W3043370888 hasRelatedWork W3168855650 @default.
- W3043370888 hasRelatedWork W3201521267 @default.
- W3043370888 hasRelatedWork W2146091986 @default.
- W3043370888 hasVolume "5" @default.
- W3043370888 isParatext "false" @default.
- W3043370888 isRetracted "false" @default.
- W3043370888 magId "3043370888" @default.
- W3043370888 workType "article" @default.