Probing the parameter space of HD 49933: A comparison between global and local methods

Bibcode
2011JPhCS.271a2038C
DOI
10.1088/1742-6596/271/1/012038
Creevey, O. L.; Bazot, M.
Bibliographical reference

Journal of Physics: Conference Series, Volume 271, Issue 1, pp. 012038 (2011).

Advertised on:
1
2011
Number of authors
2
IAC number of authors
0
Citations
7
Refereed citations
7
Description
We present two independent methods for studying the global stellar parameter space (mass M, age, chemical composition X0, Z0) of HD 49933 with seismic data. Using a local minimization and an MCMC algorithm, we obtain consistent results for the determination of the stellar properties: M = 1.1-1.2 M&sun; Age ~ 3.0 Gyr, Z0 ~ 0.008. A description of the error ellipses can be defined using Singular Value Decomposition techniques, and this is validated by comparing the errors with those from the MCMC method.
Type
Non-refereed

It may interest you

  • Non-refereed
    Multi-epoch precise photometry from the ground: MUDEHaR, magnetic O stars and everything around
    MUDEHaR has completed its first of five years of project, and all the information is already available for exploitation. MUDEHaR is a multi-epoch photometric survey with two narrow filters in Hα and the calcium triplet window that uses T80Cam at the JAST80 telescope at Javalambre spanish astronomical observatory. It is obtaining ~50 epochs/year per
    Holgado, Gonzalo et al.

    Advertised on:

    7
    2024
    Bibcode
    2024eas..conf..124H
    Citations
    0
  • Non-refereed
    Observed Structural Properties of UDGs
    Ultra-diffuse galaxies (UDGs) have been one of the latest hypes in the extragalactic community. Although discovered a few decades ago, only recently we have had the opportunity to start grasping their nature thanks to deep photometric observations and, more challengingly, spectroscopic ones. From different properties ranging from their dark matter
    Ferre-Mateu, Anna

    Advertised on:

    7
    2024
    Bibcode
    2024eas..conf..177F
    Citations
    0
  • Non-refereed
    Constraining atmospheric evaporation timescales on young planets with systematic H and He transmission observations
    During the early stages of planetary formation, planets undergo strong changes in their physical and orbital properties due to internal and external forces, which also affect their primordial atmospheres composed mainly of H and He. The study of planets in these early stages and their comparison with the more mature planet population is crucial for
    Orell-Miquel, Jaume et al.

    Advertised on:

    7
    2024
    Bibcode
    2024eas..conf.1494O
    Citations
    0