Matches in SemOpenAlex for { <https://semopenalex.org/work/W2964325765> ?p ?o ?g. }
Showing items 1 to 66 of
66
with 100 items per page.
- W2964325765 abstract "The Balmer lines of four A Ia - supergiants (spectral type A0 to A3) and fourteen B Ia and Ib - supergiants (spectral type B0 to B3) in the solar neighbourhood are analyzed by means of NLTE unified model atmospheres to determine the properties of their stellar winds, in particular their wind momenta. As in previous work for O-stars (Puls et al.) a tight relationship between stellar wind momentum and luminosity (`WLR'') is found. However, the WLR varies as function of spectral type. Wind momenta are strongest for O-supergiants, then decrease from early B (B0 and B1) to mid B (B1.5 to B3) spectral types and become stronger again for A-supergiants. The slope of the WLR appears to be steeper for A- and mid B-supergiants than for O-supergiants. The spectral type dependence is interpreted as an effect of ionization changing the effective number and the line strength distribution function of spectral lines absorbing photon momentum around the stellar flux maximum. This interpretation needs to be confirmed by theoretical calculations for radiation driven winds. A-supergiants in M31 observed with HIRES at the Keck telescope have wind momenta compatible with their galactic counterparts. The potential of the WLR as a new, independent extragalactic distance indicator is discussed. It is concluded that with ten to twenty objects, photometry with HST and medium resolution spectroscopy with 8m-telescopes from the ground distance moduli can be obtained with an accuracy of about 0.1m out to the Virgo and Fornax clusters of galaxies." @default.
- W2964325765 created "2019-07-30" @default.
- W2964325765 creator A5020765843 @default.
- W2964325765 creator A5028668027 @default.
- W2964325765 creator A5029411413 @default.
- W2964325765 creator A5031007321 @default.
- W2964325765 creator A5033311951 @default.
- W2964325765 creator A5035958223 @default.
- W2964325765 creator A5067750365 @default.
- W2964325765 creator A5078316910 @default.
- W2964325765 date "1999-10-25" @default.
- W2964325765 modified "2023-09-25" @default.
- W2964325765 title "The Wind Momentum - Luminosity Relationship of Galactic A- and B- Supergiants" @default.
- W2964325765 doi "https://doi.org/10.48550/arxiv.astro-ph/9910449" @default.
- W2964325765 hasPublicationYear "1999" @default.
- W2964325765 type Work @default.
- W2964325765 sameAs 2964325765 @default.
- W2964325765 citedByCount "4" @default.
- W2964325765 countsByYear W29643257652016 @default.
- W2964325765 crossrefType "posted-content" @default.
- W2964325765 hasAuthorship W2964325765A5020765843 @default.
- W2964325765 hasAuthorship W2964325765A5028668027 @default.
- W2964325765 hasAuthorship W2964325765A5029411413 @default.
- W2964325765 hasAuthorship W2964325765A5031007321 @default.
- W2964325765 hasAuthorship W2964325765A5033311951 @default.
- W2964325765 hasAuthorship W2964325765A5035958223 @default.
- W2964325765 hasAuthorship W2964325765A5067750365 @default.
- W2964325765 hasAuthorship W2964325765A5078316910 @default.
- W2964325765 hasBestOaLocation W29643257651 @default.
- W2964325765 hasConcept C121332964 @default.
- W2964325765 hasConcept C1276947 @default.
- W2964325765 hasConcept C150846664 @default.
- W2964325765 hasConcept C173220165 @default.
- W2964325765 hasConcept C180690934 @default.
- W2964325765 hasConcept C198785896 @default.
- W2964325765 hasConcept C44870925 @default.
- W2964325765 hasConcept C4839761 @default.
- W2964325765 hasConcept C96141758 @default.
- W2964325765 hasConcept C98444146 @default.
- W2964325765 hasConceptScore W2964325765C121332964 @default.
- W2964325765 hasConceptScore W2964325765C1276947 @default.
- W2964325765 hasConceptScore W2964325765C150846664 @default.
- W2964325765 hasConceptScore W2964325765C173220165 @default.
- W2964325765 hasConceptScore W2964325765C180690934 @default.
- W2964325765 hasConceptScore W2964325765C198785896 @default.
- W2964325765 hasConceptScore W2964325765C44870925 @default.
- W2964325765 hasConceptScore W2964325765C4839761 @default.
- W2964325765 hasConceptScore W2964325765C96141758 @default.
- W2964325765 hasConceptScore W2964325765C98444146 @default.
- W2964325765 hasLocation W29643257651 @default.
- W2964325765 hasOpenAccess W2964325765 @default.
- W2964325765 hasPrimaryLocation W29643257651 @default.
- W2964325765 hasRelatedWork W1506316959 @default.
- W2964325765 hasRelatedWork W164350437 @default.
- W2964325765 hasRelatedWork W2023175001 @default.
- W2964325765 hasRelatedWork W2044065061 @default.
- W2964325765 hasRelatedWork W2053076632 @default.
- W2964325765 hasRelatedWork W3040671294 @default.
- W2964325765 hasRelatedWork W3101395278 @default.
- W2964325765 hasRelatedWork W3106232146 @default.
- W2964325765 hasRelatedWork W3200731769 @default.
- W2964325765 hasRelatedWork W1635611031 @default.
- W2964325765 isParatext "false" @default.
- W2964325765 isRetracted "false" @default.
- W2964325765 magId "2964325765" @default.
- W2964325765 workType "article" @default.