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- Herzberg Institute of AstrophysicsCA335 papers
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67 papers · 1 filter
The Environments around W Serpentis Systems: Independent Limits on System Masses and Extended Envelopes
T. J. Davidge
Information extracted from the GAIA Data Release 3 is used to examine the stellar contents within projected separations of 10 parsecs from eight close binary systems that are eithe…
Coaxing the Eclipsing Binary V367 Cygni Out of Its Shell
T. J. Davidge
Spectra that cover 0.63 - 0.69um with a spectral resolution ~ 17000 are presented of the W Serpentis system V367 Cygni. Absorption lines of FeII and SiII that form in a circumsyste…
COBRaS: The e-MERLIN 21 cm Legacy survey of Cygnus OB2
J. C. Morford, D. M. Fenech, R. K. Prinja +12
The role of massive stars is central to an understanding of galactic ecology. It is important to establish the details of how massive stars provide radiative, chemical, and mechani…
The chemical compositions of the 2 new HgMn stars HD 30085 and HD 30963. Comparison to Lupi A, Cap and HD 174567
R. Monier, E. Griffin, M. Gebran +3
We report on a detailed abundance study of the fairly bright slow rotators HD 30085 (A0 IV), HD 30963 (B9 III) and HD 174567 (A0 V), hitherto reported as normal stars and the sharp…
Horizontal branch morphology: A new photometric parametrization
Marianna Torelli, Giacinto Iannicola, Peter B. Stetson +8
Theory and observations indicate that the distribution of stars along the horizontal branch of Galactic globular clusters mainly depends on the metal content. However, the existenc…
On a new method to estimate distance, reddening and metallicity of RR Lyrae stars using optical/near-infrared (,,,,,) mean magnitudes: Centauri as a first test case
G. Bono, G. Iannicola, V. F. Braga +26
We developed a new approach to provide accurate estimates of metal content, reddening and true distance modulus of RR Lyrae stars (RRLs). The method is based on homogeneous optical…