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Precise effective temperatures of solar analog stars
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Astrophysics.
2012 (English)In: IAU Symposium, 2012, Vol. 286, 328-331 p.Conference paper, Published paper (Refereed)
Abstract [en]

We perform a study of 62 solar analog stars to compute their effective temperatures (T $_eff$) using the Balmer line wing fitting procedure and compare them with T $_eff$ values obtained using other commonly employed methods. We use observed Hα spectral lines and a fine grid of theoretical LTE model spectra calculated with the best available atomic data and most recent quantum theory. Our spectroscopic data are of very high quality and have been carefully normalized to recover the proper shape of the Hα line profile. We obtain T $_eff$ values with internal errors of about 25K. Comparison of our results with those from other methods shows reasonably good agreement. Then, combining T $_eff$ values obtained from four independent techniques, we are able to determine final T $_eff$ values with errors of about 10K.

Place, publisher, year, edition, pages
2012. Vol. 286, 328-331 p.
Series
IAU Symposium
Keyword [en]
Lines Profiles, Stellar Atmospheres
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:uu:diva-196829DOI: 10.1017/S1743921312005042OAI: oai:DiVA.org:uu-196829DiVA: diva2:610959
Conference
IAU Symposium 286
Available from: 2013-03-13 Created: 2013-03-13 Last updated: 2013-03-13

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