Mercury in a thin layer in HgMn stars - A test of a diffusion model

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

7

A Stars, Mercury (Metal), Metallic Stars, Stellar Atmospheres, Stellar Models, Abundance, Manganese, Stellar Spectra

Scientific paper

Lines of the first three states of ionization of mercury have been observed in Mu Leporis and Chi Lupi using the Copernicus satellite. Lines of Hg II and Hg III have been observed in Alpha Andromedae. There appears to be an absorption feature at every wavelength where there is expected to be a mercury line. The presence of all three states of ionization is likely in Mu Lep and Chi Lup. The relative equivalent widths of the lines of the various states of ionization do not depend on the effective temperature of the stars, in contradiction to what is expected if mercury were uniformly distributed in the atmosphere. It is, however, expected if mercury has been concentrated, by diffusion, in a thin layer, where the radiative forces just equal the gravitational forces on mercury. That mercury should be so concentrated is also required by the explanation of the mercury isotope anomaly proposed by Michaud, Reeves, and Charland.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Mercury in a thin layer in HgMn stars - A test of a diffusion model 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 Mercury in a thin layer in HgMn stars - A test of a diffusion model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mercury in a thin layer in HgMn stars - A test of a diffusion model will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-803340

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.