SIMBAD references

2011AJ....141....6P - Astron. J., 141, 6 (2011/January-0)

RR Lyrae atmospherics: wrinkles old and new. A preview.


Abstract (from CDS):

I report some results of an echelle spectroscopic survey of RR Lyrae stars begun in 2006 that I presented in my Henry Norris Lecture of 2010 January 4. Topics include (1) atmospheric velocity gradients, (2) phase-dependent envelope turbulence as it relates to Peterson's discoveries of axial rotation on the horizontal branch and to Stothers' explanation of the Blazhko effect, (3) the three apparitions of hydrogen emission during a pulsation cycle, (4) the occurrence of He I lines in emission and absorption, (5) detection of He II emission and metallic line doubling in Blazhko stars, and finally (6) speculation about what helium observations of RR Lyrae stars in omega Centauri might tell us about the putative helium populations and the horizontal branch of that strange globular cluster.

Abstract Copyright:

Journal keyword(s): stars: variables: RR Lyrae

Simbad objects: 23

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2011AJ....141....6P and select 'bookmark this link' or equivalent in the popup menu


© Université de Strasbourg/CNRS

    • Contact