Spectroscopic fine-structure in Supernova 1987A

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

16

Balmer Series, Fine Structure, Radial Velocity, Supernova 1987A, Velocity Distribution, H Alpha Line, Photosphere, Radioactive Decay

Scientific paper

It is demonstrated that the H-alpha Bochum event is a rather general spectroscopic fine-structure event in SN 1987A around day 20. The event is also evident in H-beta, H-gamma, and H-delta, and to some degree in Na I-D and Ca II. The H-beta and H-gamma profiles do not disappear between roughly days 50 and 70 because of line blends, but rather are transiently filled up by intrinsic fine structure. The radial velocity of the observed fine structure in H-alpha and H-beta evolves similarly with time. An increase of the excitation and ionization degree of the material closely above the photosphere is the most likely mechanism for the observed fine structure. It is proposed that this increase is due to the pervasion of radioactively heated material through the photosphere around day 20. The H-alpha Bochum event then would be the earliest spectroscopic evidence for the existence and activity of shock-generated Co-56 and its mixup in SN 1987A.

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

Spectroscopic fine-structure in Supernova 1987A 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 Spectroscopic fine-structure in Supernova 1987A, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectroscopic fine-structure in Supernova 1987A will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-778876

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