A spectroscopic study of the blue stragglers in M67
arXiv:0811.2553 · doi:10.1111/j.1365-2966.2008.13741.x
Abstract
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 ~3500-10000 A. 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 -12600 K) and surface gravities that are fully compatible with those expected for main-sequence objects (log g = 3.5 -5.0 dex).
10 pages, 10 figures, published in MNRAS (2008, Volume 390, Issue 2, pp. 665-674)
References in corpus (18)
- A standard stellar library for evolutionary synthesis: I. Calibration of theoretical spectra
- Old Stellar Populations. VI. Absorption-Line Spectra of Galaxy Nuclei and Globular Clusters
- A standard stellar library for evolutionary synthesis: II. The M dwarf extension
- Catalogue of [Fe/H] determinations for FGK stars : 2001 edition
- A catalogue of [Fe/H] determinations : 1996 edition
- Deep Wide-Field Spectrophotometry of the Open Cluster M67
- Spectroscopy of Blue Stragglers and Turnoff Stars in M67 (NGC 2682)
- The blue stragglers formed via mass transfer in old open clusters
- ATLAS vs. NextGen model atmospheres: a combined analysis of synthetic spectral energy distributions
- Close Approach during Hard Binary--Binary Scattering
- Time-Series Photometry of M67: W UMa Systems, Blue Stragglers, and Related Systems
- The blue straggler S1082: a triple system in the old open cluster M67
- Blue Stragglers in Galactic Open Clusters and the Integrated Spectral Energy Distributions
- Multisite campaign on the open cluster M67. III. Delta Scuti pulsations in the blue stragglers
- Blue Straggler Stars in Galactic Open Clusters and the Simple Stellar Population Model
- The Evolution of Blue Stragglers Formed Via Stellar Collisions
- Lick Spectral Indices for Super Metal-rich Stars
- Simple Stellar Population Models as probed by the Large Magellanic Cloud Star Cluster ESO 121-SC03
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- A chemical study of M67 candidate blue stragglers and evolved blue stragglers observed with APOGEE DR14
- M67 Blue Stragglers with High-resolution Infrared Spectroscopy
- Asteroseismic Study of Subgiants and Giants of the Open Cluster M67 using Kepler/K2: Expanded Sample and Precise Masses