Modeling the Near-ultraviolet Band of GK Stars. I. Local Thermodynamic Equilibrium Models

Details Modeling the Near-ultraviolet Band of GK Stars. I. Local Thermodynamic Equilibrium Models Modeling the Near-ultraviolet Band of GK Stars. I. Local Thermodynamic Equilibrium Models

Aug 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010apj...718.1416s&link_type=abstract

The Astrophysical Journal, Volume 718, Issue 2, pp. 1416-1427 (2010).

Astronomy and Astrophysics

Astronomy

2

Stars: Atmospheres, Stars: Fundamental Parameters, Stars: Late-Type

Scientific paper

We present a grid of LTE atmospheric models and synthetic spectra that covers the spectral class range from mid-G to mid-K, and luminosity classes from V to III, that is dense in T eff sampling (ΔT eff = 62.5 K), for stars of solar metallicity and moderately metal-poor scaled solar abundance ([{{A}\over {H}}]=0.0 and -0.5). All models have been computed with two choices of atomic line list: (1) the "big" line lists of Kurucz that best reproduce the broadband solar blue and near-UV f λ level, and (2) the "small" lists of Kurucz & Peytremann that provide the best fit to the high-resolution solar blue and near-UV spectrum. We compare our model spectral energy distributions to a sample of stars carefully selected from the large catalog of uniformly re-calibrated spectrophotometry of Burnashev with the goal of determining how the quality of fit varies with stellar parameters, especially in the historically troublesome blue and near-UV bands. We confirm that our models computed with the "big" line list recover the derived T eff values of the PHOENIX NextGen grid, but find that the models computed with the "small" line list provide greater internal self-consistency among different spectral bands, and closer agreement with the empirical T eff scale of Ramirez & Melendez, but not to the interferometrically derived T eff values of Baines et al. We find no evidence that the near-UV band discrepancy between models and observations for Arcturus (α Boo) reported in two works by Short & Hauschildt is pervasive, and that Arcturus may be peculiar in this regard.

Affiliated with

Also associated with

No associations

Rating

Modeling the Near-ultraviolet Band of GK Stars. I. Local Thermodynamic Equilibrium Models 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 Modeling the Near-ultraviolet Band of GK Stars. I. Local Thermodynamic Equilibrium Models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modeling the Near-ultraviolet Band of GK Stars. I. Local Thermodynamic Equilibrium Models will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1863076