Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2012-01-13
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
To be published April 2012. 14 pages, 9 figures, 4 tables
Scientific paper
A number of empirical correlations that allows us to calculate the effective temperature and surface gravity for a set evolved post-AGB and RV Tauri stars are determined using as calibrators the intrinsic colours of 2MASS (Two Micron All Sky Survey) photometry. We have analyzed a total sample of 36 stars where 25 are post-AGB stars and 11 are RV Tauri stars, respectively. A group of 11 stars with parallaxes measures were used as calibrators of the absolute magnitude. The result for T$_{\rm eff}$ and log g from intrinsic colours (J-H)$_{0}$ and (H-K$_{s}$)$_{0}$ at the near-infrared pass bands reach a dispersion of 220 K and 0.27, respectively. We can estimate the absolute magnitude using the intrinsic colour in the near-infrared band with an uncertainty of 0.28 mag. This indicates that (J-H)$_{0}$ and (H-K$_{s}$)$_{0}$ show sensitivity to the absolute magnitude.
No associations
LandOfFree
An approach to effective temperature and surface gravity in post-AGB and RV Tauri stars at the near-IR region does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with An approach to effective temperature and surface gravity in post-AGB and RV Tauri stars at the near-IR region, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An approach to effective temperature and surface gravity in post-AGB and RV Tauri stars at the near-IR region will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-471967