Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-06-20
Astrophys.J.556:L63,2001
Astronomy and Astrophysics
Astrophysics
16 pages, 3 eps figures included; a more compact PostScript version created using emulateapj.sty is available from http://he
Scientific paper
10.1086/322874
We reexamine closely the solar photospheric line at 6300 A, which is attributed to a forbidden line of neutral oxygen, and is widely used in analyses of other late-type stars. We use a three-dimensional time-dependent hydrodynamical model solar atmosphere which has been tested successfully against observed granulation patterns and an array of absorption lines. We show that the solar line is a blend with a Ni I line, as previously suggested but oftentimes neglected. Thanks to accurate atomic data on the [O I] and Ni I lines we are able to derive an accurate oxygen abundance for the Sun: log epsilon (O) = 8.69 +/- 0.05 dex, a value at the lower end of the distribution of previously published abundances, but in good agreement with estimates for the local interstellar medium and hot stars in the solar neighborhood. We conclude by discussing the implication of the Ni I blend on oxygen abundances derived from the [O I] 6300 A line in disk and halo stars.
Allende Prieto Carlos
Asplund Martin
Lambert David L.
No associations
LandOfFree
The 'Forbidden' Abundance of Oxygen in the Sun 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 The 'Forbidden' Abundance of Oxygen in the Sun, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The 'Forbidden' Abundance of Oxygen in the Sun will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-517216