Spectroscopic metallicities of Vega-like stars

@article{Saffe2008SpectroscopicMO,
  title={Spectroscopic metallicities of Vega-like stars},
  author={C. Saffe and M. N. G{\'o}mez and Olga I. Pintado and Erica Gonzalez},
  journal={Astronomy and Astrophysics},
  year={2008},
  volume={490},
  pages={297-305}
}
Aims. We aim to determine the metallicities of 113 Southern Hemisphere Vega-like candidate stars in relation to the giant exoplanet host group and field stars. Methods. We applied two spectroscopic methods of abundance determinations: equivalent width measurements together with the ATLAS9 model atmospheres and the WIDTH9 program, and a comparison of observed spectra with a grid of synthetic spectra. Results. For the Vega-like group, the metallicities are indistinguishable from those of field… Expand
Characterization of the gaseous companion κ Andromedae b - New Keck and LBTI high-contrast observations
Context. We previously reported the direct detection of a low mass companion at a projected separation of 55 2 AU around the B9 type star Andromedae. The properties of the system (mass ratio,Expand
A high-resolution spectropolarimetric survey of Herbig Ae/Be stars – I. Observations and measurements
This is the first in a series of papers in which we describe and report the analysis of a large survey of Herbig Ae/Be stars in circular spectropolarimetry. Using the ESPaDOnS and NarvalExpand
A near-infrared interferometric survey of debris-disk stars - IV. An unbiased sample of 92 southern stars observed in H band with VLTI/PIONIER
Context. Detecting and characterizing circumstellar dust is a way to study the architecture and evolution of planetary systems. Cold dust in debris disks only traces the outer regions. Warm and hotExpand
STRUCTURE AND EVOLUTION OF DEBRIS DISKS AROUND F-TYPE STARS. I. OBSERVATIONS, DATABASE, AND BASIC EVOLUTIONARY ASPECTS
Although photometric and spectroscopic surveys with the Spitzer Space Telescope remarkably increased the number of well-studied debris disks around A-type and Sun-like stars, detailed analyses ofExpand
AB Dor Moving Group Stars Resolved with the CHARA Array
We present interferometric measurements obtained with the CHARA Array of 13 adolescent-age stars in nearby moving groups. The motivation was to spatially resolve the largest stars and to search forExpand
Revisiting the pulsational characteristics of the exoplanet host star β Pictoris
Context. Exoplanet properties crucially depend on the parameters of their host stars: more accurate stellar parameters yield more accurate exoplanet characteristics. When the exoplanet host starExpand
HERSCHEL OBSERVATIONS AND UPDATED SPECTRAL ENERGY DISTRIBUTIONS OF FIVE SUNLIKE STARS WITH DEBRIS DISKS
Observations from the Herschel Space Observatory have more than doubled the number of wide debris disks orbiting Sunlike stars to include over 30 systems with R > 100 AU. Here we present new HerschelExpand
The atmospheric parameters and spectral interpolator for the MILES stars
Context. Empirical libraries of stellar spectra are used to classify stars and synthetize stellar populations. MILES is a medium spectralresolution library in the optical domain covering a wide rangeExpand
Coudé-feed stellar spectral library – atmospheric parameters
Context. Empirical libraries of stellar spectra play an important role in different fields. For example, they are used as reference for the automatic determination of atmospheric parameters, or forExpand
The Correlation Between Metallicity and Debris Disk mass
We find that the initial dust masses in planetary debris disks are correlated with the metallicities of their central stars. We compiled a large sample of systems, including Spitzer, the HerschelExpand
...
1
2
3
...

References

SHOWING 1-10 OF 102 REFERENCES
Ages of A-Type Vega-like Stars from uvbyβ Photometry
We have estimated the ages of a sample of A-type Vega-like stars by using Stromgren uvbyβ photometric data and theoretical evolutionary tracks. We find that 13% of these A stars have been reported asExpand
Candidate Main-Sequence Stars with Debris Disks: A New Sample of Vega-like Sources
Vega-like sources are main-sequence stars that exhibit IR fluxes in excess of expectations for stellar photospheres, most likely due to reradiation of stellar emission intercepted by orbiting dustExpand
Twelve additional «Vega-like» stars
Twelve additional 'Vega-like' stars which show large excess fluxes at 60 microns are found in the Bright Star Catalog from a systematic search of the IRAS point-source catalog. These stars range inExpand
Spectroscopic metallicities for planet-host stars: Extending the samples
We present stellar parameters and metallicities for 29 planet-host stars, as well as for a large volume-limited sample of 53 stars not known to be orbited by any planetary-mass companion. These starsExpand
A 25 micron search for Vega-like disks around main-sequence stars with ISO
We present an ISO 25 m photometric survey of a sample of 81 nearby main-sequence stars in order to determine the incidence of \warm" dust disks. All stars were detected by ISO. We used an empiricalExpand
Statistical properties of exoplanets. II. Metallicity, orbital parameters, and space velocities
In this article we present a detailed spectroscopic analysis of more than 50 extra-solar planet host stars. Stellar atmospheric parameters and metallicities are derived using high resolution and highExpand
The Planet-Metallicity Correlation
We have recently carried out spectral synthesis modeling to determine Teff, log g, v sin i, and [Fe/H] for 1040 FGK-type stars on the Keck, Lick, and Anglo-Australian Telescope planet searchExpand
COOL CIRCUMSTELLAR MATTER AROUND NEARBY MAIN-SEQUENCE STARS
Stars are presented which have characteristics similar to Vega and other main-sequence stars with cool dust disks, based on the IRAS Point Source Catalog fluxes. The objects are selected to have a 60Expand
A search for H2 around pre‐main‐sequence stars
We present the results of a search for pure rotational molecular hydrogen emission from two pre-main-sequence stars, AB Aur and CQ Tau. Observations were made using MICHELLE, the mid-infrared echelleExpand
Metallicity, debris discs and planets
We investigate the populations of main-sequence stars within 25 pc that have debris discs and/or giant planets detected by Doppler shift. The metallicity distribution of the debris sample is a veryExpand
...
1
2
3
4
5
...