Issue |
A&A
Volume 450, Number 2, May I 2006
|
|
---|---|---|
Page(s) | 735 - 746 | |
Section | Stellar structure and evolution | |
DOI | https://doi.org/10.1051/0004-6361:20054021 | |
Published online | 10 April 2006 |
Effective temperature scale and bolometric corrections from 2MASS photometry
1
Departament d'Astronomia i Meteorologia, Universitat de Barcelona, Avda. Diagonal 647, 08028 Barcelona, Spain e-mail: emasana@am.ub.es
2
CER for Astrophysics, Particle Physics and Cosmology, associated with Institut de Ciències de l'Espai-CSIC
3
Institut d'Estudis de Espacials de Catalunya (IEEC). Edif. Nexus, C/Gran Capità 2-4, 08034 Barcelona, Spain
4
Institut de Ciències de l'Espai, CSIC, Campus UAB, Fac. Ciències, Torre C5 parell, 2$^{\rm a}$ planta, 08193 Bellaterra, Spain
Received:
9
August
2005
Accepted:
6
January
2006
We present a method to determine effective
temperatures, angular semi-diameters and bolometric corrections for
population I and II FGK type stars based on V and 2MASS IR photometry.
Accurate calibration is accomplished by using a sample of solar analogues,
whose average temperature is assumed to be equal to the solar effective
temperature of 5777 K. By taking into account all possible sources of
error we estimate associated uncertainties to better than 1% in effective
temperature and in the range 1.0–2.5% in angular semi-diameter for
unreddened stars. Comparison of our new temperatures with other
determinations extracted from the literature indicates, in general,
remarkably good agreement. These results suggest that the effective
temperaure scale of FGK stars is currently established with an accuracy
better than 0.5%–1%. The application of the method to a sample of
10 999 dwarfs in the Hipparcos catalogue allows us to define temperature
and bolometric correction (K band) calibrations as a function of ,
and
. Bolometric corrections in the V and K bands as a function of Teff,
and
are also given. We provide effective temperatures, angular
semi-diameters, radii and bolometric corrections in the V and
K bands for the 10 999 FGK stars in our sample with the
corresponding uncertainties.
Key words: stars: fundamental parameters / stars: late-type / stars: sub-dwarfs / infrared: stars / techniques: photometric / methods: analytical
© ESO, 2006
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.