Quantitative spectroscopy of Deneb

@article{Schiller2008QuantitativeSO,
  title={Quantitative spectroscopy of Deneb},
  author={Florian Schiller and Norbert Przybilla},
  journal={Astronomy and Astrophysics},
  year={2008},
  volume={479},
  pages={849-858}
}
Context. Quantitative spectroscopy of luminous BA-type supergiants offers a high potential for modern astrophysics. Detailed studies allow the evolution of massive stars, galactochemical evolution, and the cosmic distance scale to be constrained observationally. Aims. A detailed and comprehensive understanding of the atmospheres of BA-type supergiants is required in order to use this potential properly. The degree to which we can rely on quantitative studies of this class of stars as a whole… Expand
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References

SHOWING 1-10 OF 42 REFERENCES
Quantitative spectroscopy of ba-type supergiants
Luminous BA-type supergiants have enormous potential for modern astrophysics. They allow topics ranging from non-LTE physics and the evolution of massive stars to the chemical evolution of galaxiesExpand
On the α-Element Abundance Gradients in the Disk of the Sculptor Spiral Galaxy NGC 300*
We have carried out a detailed spectral analysis of six early B-type supergiants in the Sculptor Group spiral galaxy NGC 300. To this end, we used state-of-the-art unified blanketed non-localExpand
Carbon abundances of early B-type stars in the solar vicinity. Non-LTE line-formation for C II/III/I
Context. Precise determinations of the chemical composition in early B-type stars constitute fundamental observational constraints on stellar and galactochemical evolution. Carbon, in particular, isExpand
Stellar Spectroscopy Far Beyond the Local Group
Multiobject spectroscopic observations of blue supergiants in NGC 3621, a spiral galaxy at a distance of 6.7 Mpc, carried out with the ESO Very Large Telescope and focal reducer/spectrograph areExpand
Spectroscopy of Blue Supergiants in the Spiral Galaxy NGC 300
We have obtained VLT low-resolution (~5 ?) multiobject spectroscopy in the 4000-5000 ? spectral range of about 70 blue supergiant candidates in the Sculptor Group spiral galaxy NGC 300, selected fromExpand
C II Abundances in Early-Type Stars: Solution to a Notorious Non-LTE Problem
We address a long-standing discrepancy between non-LTE analyses of the prominent C II 4267 and 6578/82 A multiplets in early-type stars. A comprehensive non-LTE model atom of C II is constructedExpand
The Spectral Energy Distribution and Mass-Loss Rate of the A-Type Supergiant Deneb
A stellar wind module has been developed for the PHOENIX stellar atmosphere code for the purpose of computing non-LTE, line-blanketed, expanding atmospheric structures and detailed synthetic spectraExpand
Atmospheric NLTE-models for the spectroscopic analysis of blue stars with winds. II. Line-blanketed models
Received; accepted Abstract. We present new or improved methods for calculating NLTE, line-blanketed model atmospheres for hot stars with winds (spectral types A to O), with particular emphasis on aExpand
A New Extragalactic Distance Determination Method Using the Flux-weighted Gravity of Late B and Early A Supergiants*
Stellar evolution calculations predict the flux-weighted gravity g/T and absolute bolometric magnitude of blue supergiants to be strongly correlated. We use medium-resolution multiobject spectroscopyExpand
Presupernova Evolution of Rotating Massive Stars. II. Evolution of the Surface Properties
We investigate the evolution of the surface properties of models for rotating massive stars, i.e., their luminosities, effective temperatures, surface rotational velocities, and surface abundances ofExpand
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