SpectroWeb: Oscillator Strength Measurements of Atomic Absorption Lines in the Sun and Procyon

Details SpectroWeb: Oscillator Strength Measurements of Atomic Absorption Lines in the Sun and Procyon SpectroWeb: Oscillator Strength Measurements of Atomic Absorption Lines in the Sun and Procyon

2007-12-07

arxiv.org/abs/0712.1185v1

J.Phys.Conf.Ser.130:012015,2008

Astronomy and Astrophysics

Astrophysics

6 pages, 7 figures. To appear in Proc. of the 9th Int. Coll. on Atomic Spectra and Oscillator Strengths for Astrophysical and

Scientific paper

10.1088/1742-6596/130/1/012015

We update the online SpectroWeb database of spectral standard reference stars with 1178 oscillator strength values of atomic absorption lines observed in the optical spectrum of the Sun and Procyon (Alpha CMi A). The updated line oscillator strengths are measured with best fits to the disk-integrated KPNO-FTS spectrum of the Sun observed between 4000 A and 6800 A using state-of-the-art detailed spectral synthesis calculations. A subset of 660 line oscillator strengths is validated with synthetic spectrum calculations of Procyon observed with ESO-UVES between 4700 A and 6800 A. The new log(gf)-values in SpectroWeb are improved over the values offered in the online Vienna Atomic Line Database (VALD). We find for neutral iron-group elements, such as Fe I, Ni I, Cr I, and Ti I, a statistically significant over-estimation of the VALD log(gf)-values for weak absorption lines with normalized central line depths below 15 %. For abundant lighter elements (e.g. Mg I and Ca I) this trend is statistically not significantly detectable, with the exception of Si I for which the log(gf)-values of 60 weak and medium-strong lines are substantially decreased to best fit the observed spectra. The newly measured log(gf)-values are available in the SpectroWeb database at http://spectra.freeshell.org which interactively displays the observed and computed stellar spectra, together with corresponding atomic line data.

Affiliated with

Also associated with

No associations

Rating

SpectroWeb: Oscillator Strength Measurements of Atomic Absorption Lines in the Sun and Procyon 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 SpectroWeb: Oscillator Strength Measurements of Atomic Absorption Lines in the Sun and Procyon, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and SpectroWeb: Oscillator Strength Measurements of Atomic Absorption Lines in the Sun and Procyon will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-120964