High-Resolution Spectroscopy of the Transiting Planet Host Star TrES-1

Bibcode
2004ApJ...616L.167S
DOI
10.1086/426864
Sozzetti, Alessandro; Yong, David; Torres, Guillermo; Charbonneau, David; Latham, David W.; Allende Prieto, Carlos; Brown, Timothy M.; Carney, Bruce W.; Laird, John B.
Bibliographical reference

The Astrophysical Journal, Volume 616, Issue 2, pp. L167-L170.

Advertised on:
12
2004
Journal
The Astrophysical Journal
Number of authors
9
IAC number of authors
0
Citations
61
Refereed citations
54
Description
We report on a spectroscopic determination of the stellar parameters and chemical abundances for the parent star of the transiting planet TrES-1. Based on a detailed analysis of iron lines in our Keck and Hobby-Eberly Telescope spectra, we derive Teff=5250+/-75 K, logg=4.6+/-0.2, and [Fe/H]=0.00+/-0.09. By measuring the Ca II activity indicator and by putting useful upper limits on the Li abundance, we constrain the age of TrES-1 to be 2.5+/-1.5 Gyr. By comparing theoretical stellar evolution models with the observational parameters, we obtain M*=0.89+/-0.05 Msolar and R*=0.83+/-0.05 Rsolar. Our improved estimates of the stellar parameters are utilized in a new analysis of the transit photometry of TrES-1 to derive a mass Mp=(0.76+/-0.05)MJ, a radius Rp=1.04+0.08-0.05RJ, and an inclination i=89.5+0.5-1.3 deg. The improved planetary mass and radius estimates provide the grounds for new crucial tests of theoretical models of evolution and evaporation of irradiated extrasolar giant planets.
Type
Refereed

It may interest you

  • Refereed
    An ultra-short-period super-Earth with an extremely high density and an outer companion
    We present the discovery and characterization of a new multi-planetary system around the Sun-like star K2-360 (EPIC 201595106). K2-360 was first identified in K2 photometry as the host of an ultra-short-period (USP) planet candidate with a period of 0.88 d. We obtained follow-up transit photometry, confirming the star as the host of the signal
    Livingston, John H. et al.

    Advertised on:

    11
    2024
    Bibcode
    2024NatSR..1427219L
    Citations
    0
  • Refereed
    Neural calibration of imaging Stokes polarimeters
    Current polarimetric calibration techniques derive the instrument modulation matrix by numerically fitting an instrumental model to measurements of a set of calibration Stokes vectors. These techniques are typically limited to an error on the retrieved normalized Stokes Q, U and V parameters, in the $1\times10^{-2}$ to $1\times10^{-3}$ range. This
    Iglesias, F. A. et al.

    Advertised on:

    8
    2024
    Bibcode
    2024BAAA...65..281I
    Citations
    0
  • Refereed
    Model-based identification of solar coronal mass ejections using deep neural networks
    Coronal mass ejections (CMEs) are a major driver of space weather and thus can have important negative technological and social impacts. To assess their geoeffectiveness once they are ejected, it is crucial their prompt identification in coronagraph images. In the last decade, deep neural networks (DNN) have experienced enormous improvements in
    Iglesias, F. A. et al.

    Advertised on:

    8
    2024
    Bibcode
    2024BAAA...65...17I
    Citations
    0