5-year spectroscopy and photometry of Deneb : J/AJ/141/17

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Authors : Richardson N.D. orcid , Morrison N.D., Kryukova E.E. (hide) , Morrison N.D., Kryukova E.E. et..al

VizieR DOI : 10.26093/cds/vizier.51410017
Bibcode : 2011AJ....141...17R (ADS) (Simbad) (Objects)
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CDS Keywords : Stars, variable; Stars, supergiant; Equivalent widths; Photometry, uvby
UAT : Variable stars, Supergiant stars, Line intensities, Optical astronomy, Medium band photometry

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Inserted into VizieR : 11-Aug-2012
Last modification : 03-Jul-2017

A five-year spectroscopic and photometric campaign on the prototypical {alpha} Cygni variable and A-type supergiant star Deneb. (2011)

Keywords : stars early-type - stars: individual (Deneb) - stars: mass-loss - stars: variables: general - supergiants

Abstract:Deneb is often considered the prototypical A-type supergiant and is one of the visually most luminous stars in the Galaxy. A-type supergiants are potential extragalactic distance indicators, but the variability of these stars needs to be better characterized before this technique can be considered reliable. We analyzed 339 high-resolution echelle spectra of Deneb obtained over the five-year span of 1997 through 2001 as well as 370 Stroemgren photometric measurements obtained during the same time frame. Our spectroscopic analysis included dynamical spectra of the H{alpha} profile, H{alpha} equivalent widths, and radial velocities measured from SiII {lambda}{lambda} 6347, 6371. ...(more)
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Three hundred and thirty-nine high-resolution (R=26000) red-yellow spectra of Deneb were obtained between 1997 March 20 and 2001 December 21 with the Ritter Observatory 1m telescope and fiber-fed echelle spectrograph. Three hundred and seventy differential Stroemgren photometric measurements were made with the Four College Automated Photoelectric Telescope (FCAPT) during the concurrent time period of 1997 October 29 to 2001 July 2.

  • J/A+A/364/237 : Elemental abundances of Deneb (Albayrak+, 2000)
  • J/A+A/400/1043 : Spectroscopic atlas of Deneb 3826-5212{AA} (Albayrak+, 2003)

                


                

                    

                


                

                    

                


                

                    
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