Matches in SemOpenAlex for { <https://semopenalex.org/work/W2147128104> ?p ?o ?g. }
- W2147128104 endingPage "998" @default.
- W2147128104 startingPage "985" @default.
- W2147128104 abstract "We analyse the optical spectrum of the very massive binary system WR 20a (WN6ha + WN6ha). The most prominent emission lines, Hα and He ii λ 4686, display strong phase-locked profile variability. From the variations of their equivalent widths and from a tomographic analysis, we find that part of the line emission probably arises in a wind interaction region between the stars. Our analysis of the optical spectrum of WR 20a indicates a reddening of mag and a distance of ~ kpc, suggesting that the star actually belongs to the open cluster Westerlund 2. The location of the system at ∼1.1 pc from the cluster core could indicate that WR 20a was gently ejected from the core via dynamical interactions. Using a non-LTE model atmosphere code, we derive the fundamental parameters of each component: K, , yr-1 (assuming a clumped wind with a volume filling factor ). Nitrogen is enhanced in the atmospheres of the components of WR 20a, while carbon is definitely depleted. Finally, the position of the binary components in the Hertzsprung-Russell diagram suggests that they are core hydrogen burning stars in a pre-LBV stage and their current atmospheric chemical composition probably results from rotational mixing that might be enhanced in a close binary compared to a single star of same age." @default.
- W2147128104 created "2016-06-24" @default.
- W2147128104 creator A5003067523 @default.
- W2147128104 creator A5006206971 @default.
- W2147128104 creator A5018423236 @default.
- W2147128104 creator A5025696341 @default.
- W2147128104 creator A5036507348 @default.
- W2147128104 creator A5043240614 @default.
- W2147128104 creator A5068280975 @default.
- W2147128104 creator A5086492121 @default.
- W2147128104 creator A5089846654 @default.
- W2147128104 date "2005-03-01" @default.
- W2147128104 modified "2023-10-15" @default.
- W2147128104 title "The spectrum of the very massive binary system WR 20a (WN6ha + WN6ha): Fundamental parameters and wind interactions" @default.
- W2147128104 cites W136006321 @default.
- W2147128104 cites W1494469588 @default.
- W2147128104 cites W1966247864 @default.
- W2147128104 cites W1975684122 @default.
- W2147128104 cites W1983849072 @default.
- W2147128104 cites W1991502431 @default.
- W2147128104 cites W1993607476 @default.
- W2147128104 cites W1996900209 @default.
- W2147128104 cites W2002033407 @default.
- W2147128104 cites W2004580848 @default.
- W2147128104 cites W2014594465 @default.
- W2147128104 cites W2020310578 @default.
- W2147128104 cites W2023148293 @default.
- W2147128104 cites W2025107042 @default.
- W2147128104 cites W2027589198 @default.
- W2147128104 cites W2033001644 @default.
- W2147128104 cites W2034575083 @default.
- W2147128104 cites W2046301828 @default.
- W2147128104 cites W2047884463 @default.
- W2147128104 cites W2048757238 @default.
- W2147128104 cites W2059412677 @default.
- W2147128104 cites W2059571318 @default.
- W2147128104 cites W2063398397 @default.
- W2147128104 cites W2067886648 @default.
- W2147128104 cites W2080783288 @default.
- W2147128104 cites W2096393314 @default.
- W2147128104 cites W2096416121 @default.
- W2147128104 cites W2097389505 @default.
- W2147128104 cites W2101432910 @default.
- W2147128104 cites W2104609084 @default.
- W2147128104 cites W2107225101 @default.
- W2147128104 cites W2125328487 @default.
- W2147128104 cites W2125902541 @default.
- W2147128104 cites W2129039251 @default.
- W2147128104 cites W2135062727 @default.
- W2147128104 cites W2151279282 @default.
- W2147128104 cites W2153408444 @default.
- W2147128104 cites W2156811398 @default.
- W2147128104 cites W2157223684 @default.
- W2147128104 cites W2164139019 @default.
- W2147128104 cites W3100485470 @default.
- W2147128104 cites W3103221027 @default.
- W2147128104 cites W330134876 @default.
- W2147128104 doi "https://doi.org/10.1051/0004-6361:20042136" @default.
- W2147128104 hasPublicationYear "2005" @default.
- W2147128104 type Work @default.
- W2147128104 sameAs 2147128104 @default.
- W2147128104 citedByCount "72" @default.
- W2147128104 countsByYear W21471281042012 @default.
- W2147128104 countsByYear W21471281042013 @default.
- W2147128104 countsByYear W21471281042014 @default.
- W2147128104 countsByYear W21471281042015 @default.
- W2147128104 countsByYear W21471281042016 @default.
- W2147128104 countsByYear W21471281042017 @default.
- W2147128104 countsByYear W21471281042019 @default.
- W2147128104 countsByYear W21471281042021 @default.
- W2147128104 countsByYear W21471281042022 @default.
- W2147128104 countsByYear W21471281042023 @default.
- W2147128104 crossrefType "journal-article" @default.
- W2147128104 hasAuthorship W2147128104A5003067523 @default.
- W2147128104 hasAuthorship W2147128104A5006206971 @default.
- W2147128104 hasAuthorship W2147128104A5018423236 @default.
- W2147128104 hasAuthorship W2147128104A5025696341 @default.
- W2147128104 hasAuthorship W2147128104A5036507348 @default.
- W2147128104 hasAuthorship W2147128104A5043240614 @default.
- W2147128104 hasAuthorship W2147128104A5068280975 @default.
- W2147128104 hasAuthorship W2147128104A5086492121 @default.
- W2147128104 hasAuthorship W2147128104A5089846654 @default.
- W2147128104 hasBestOaLocation W21471281041 @default.
- W2147128104 hasConcept C121332964 @default.
- W2147128104 hasConcept C1276947 @default.
- W2147128104 hasConcept C150846664 @default.
- W2147128104 hasConcept C164866538 @default.
- W2147128104 hasConcept C169233029 @default.
- W2147128104 hasConcept C182283691 @default.
- W2147128104 hasConcept C198352243 @default.
- W2147128104 hasConcept C199360897 @default.
- W2147128104 hasConcept C2524010 @default.
- W2147128104 hasConcept C33923547 @default.
- W2147128104 hasConcept C41008148 @default.
- W2147128104 hasConcept C44870925 @default.
- W2147128104 hasConcept C48372109 @default.
- W2147128104 hasConcept C4839761 @default.
- W2147128104 hasConcept C94375191 @default.