2008/09/01 by G. Q. Liu, L. Deng, M. Chavez +5
Physics and Astronomy · #Astronomical spectroscopy #Astronomy and Astrophysical Research #Astrophysics and Star Formation Studies #Blue straggler #Cluster (spacecraft) #Galaxy groups and clusters #Observatory #Open cluster #Spectral line #Stars #Stellar classification #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1111/j.1365-2966.2008.13741.x
10 pages, 10 figures, published in MNRAS (2008, Volume 390, Issue 2, pp. 665-674)
openalex publication_date 2008/09/01 · arxiv created 2008/11/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Based on spectrophotometric observations from the Guillermo Haro Observatory (Cananea, Mexico), a study of the spectral properties of the complete sample of 24 blue straggler stars (BSs) in the old Galactic open cluster M67 (NGC 2682) is presented. All spectra, calibrated using spectral standards, were recalibrated by means of photometric magnitudes in the Beijing–Arizona–Taipei–Connecticut system, which includes fluxes in 11 bands covering ∼3500–10 000 Å. The set of parameters was obtained using two complementary approaches that rely on a comparison of the spectra with (i) an empirical sample of stars with well-established spectral types and (ii) a theoretical grid of optical spectra computed at both low and high resolution. The overall results indicate that the BSs in M67 span a wide range in Teff(∼ 5600 –126 00 K) and surface gravities that are fully compatible with those expected for main-sequence objects (log g= 3.5 –5.0 dex).