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The DOI matches its Crossref record; 83 of the 83 references it cites were found in a registry or an index.

An absolutely calibrated Teffscale from the infrared flux method: Dwarfs and subgiants

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Casagrande, L., Ramírez, I., Meléndez, J., Bessell, M., Asplund, M.·2010·Astronomy and Astrophysics

Abstract

Various effective temperature scales have been proposed over the years. Despite much work and the high internal precision usually achieved, systematic differences of order 100 K (or more) among various scales are still present. We present an investigation based on the infrared flux method aimed at assessing the source of such discrepancies and pin down their origin. We break the impasse among different scales by using a large set of solar twins, stars which are spectroscopically and photometrically identical to the Sun, to set the absolute zero point of the effective temperature scale to within few degrees. Our newly calibrated, accurate and precise temperature scale applies to dwarfs and subgiants, from super-solar metallicities to the most metal-poor stars currently known. At solar metallicities our results validate spectroscopic effective temperature scales, whereas for [Fe/H] -2.5 our temperatures are roughly 100 K hotter than those determined from model fits to the Balmer lines and 200 K hotter than those obtained from the excitation equilibrium of Fe lines. Empirical bolometric corrections and useful relations linking photometric indices to effective temperatures and angular diameters have been derived. Our results take full advantage of the high accuracy reached in absolute calibration in recent years and are further validated by interferometric angular diameters and space based spectrophotometry over a wide range of effective temperatures and metallicities.

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Metadata

Authors
Casagrande, L., Ramírez, I., Meléndez, J., Bessell, M., & Asplund, M.
Venue
Astronomy and Astrophysics
Publisher
EDP Sciences
Published
2010-03
Volume
512
Pages
A54
ISSN
  • 0004-6361 (ISSN-L)
  • 1432-0746
OpenAlex
W2151554466
Cited by
718
References
83
FWCI
37.75
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: An absolutely calibrated Teffscale from the infrared flux method: Dwarfs and subgiants. https://app.cochat.ai/papers/10.1051/0004-6361/200913204
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Casagrande, L., Ramírez, I., Meléndez, J., Bessell, M., & Asplund, M. (2010). An absolutely calibrated Teffscale from the infrared flux method: Dwarfs and subgiants. Astronomy and Astrophysics. https://doi.org/10.1051/0004-6361/200913204

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