Modelling Stellar Optical and Mid-Ultraviolet Spectra from First Principles

Details Modelling Stellar Optical and Mid-Ultraviolet Spectra from First Principles Modelling Stellar Optical and Mid-Ultraviolet Spectra from First Principles

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.0708p&link_type=abstract

American Astronomical Society Meeting 204, #07.08; Bulletin of the American Astronomical Society, Vol. 36, p.786

Astronomy and Astrophysics

Astrophysics

Scientific paper

We present comparisons of theoretical and observational high-resolution spectra for a half-dozen stars of a wide range of temperature and abundance, from A star to K giant. These show the fits achieved to date by our ab initio spectral calculations. These comparisons form the first phase of our three-year Hubble Treasury program GO-9455/9974, aimed at providing mid-ultraviolet spectral templates to improve the determination of the age and metallicity of old stellar systems. From matches such as these, we have modified the input atomic-line parameters and guessed the identifications of spectral lines missing from the calculations, as described by Peterson, Dorman, & Rood (2001, ApJ, 559, 372).
With this new line list, we now match well the optical spectra of stars of all line strengths. We have begun to calculate a grid of optical indices from the theoretical spectra. In the mid-UV, while the fits at solar abundance are much improved, we are still missing very weak absorption lines near 2650Å and 2900Å. This will be addressed as additional mid-ultraviolet spectra are taken for a larger range of stellar targets during Cycle 13.
Support for this work includes grants GO-9455 and GO-9974 from the Hubble Space Telescope Science Institute, and an award from the NASA-OSS Long Term Space Astrophysics program.

Affiliated with

Also associated with

No associations

Rating

Modelling Stellar Optical and Mid-Ultraviolet Spectra from First Principles 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 Modelling Stellar Optical and Mid-Ultraviolet Spectra from First Principles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modelling Stellar Optical and Mid-Ultraviolet Spectra from First Principles will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1170367