Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009mnras.393.1503b&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 393, Issue 4, pp. 1503-1512.
Astronomy and Astrophysics
Astronomy
9
Atomic Data, Atomic Processes, Line: Formation, Stars: Abundances
Scientific paper
We continue a systematic study of chemical abundances of the strontium filament found in the ejecta of ηCarinae. To this end we interpret the emission spectrum of ScII and CrII using multilevel non-local thermodynamic equilibrium models. Since the atomic data for these ions were previously unavailable, we carry out ab initio calculations of radiative transition rates and electron impact excitation rate coefficients. The observed spectrum is consistent with an electron density of the order of 107cm-3 and a temperature between 6000 and 7000K, conditions previously determined from [NiII], [TiII] and [SrII] diagnostics. The observed spectrum indicates an abundance of Sc relative to Ni more than 40 times the solar value, while the Cr/Ni abundance ratio is roughly solar. Various scenarios of depletion and dust destruction are suggested to explain such abnormal abundances.
Ballance Connor
Bautista Manuel A.
Gull Ted R.
Hartman Henrik
Lodders Katharina
No associations
LandOfFree
Scandium and chromium in the strontium filament in the Homunculus of ηCarinae 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 Scandium and chromium in the strontium filament in the Homunculus of ηCarinae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scandium and chromium in the strontium filament in the Homunculus of ηCarinae will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1711527