Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010iaus..268..499t&link_type=abstract
Light Elements in the Universe, Proceedings of the International Astronomical Union, IAU Symposium, Volume 268, p. 499-500
Astronomy and Astrophysics
Astronomy
Galaxy: Disk, Evolution — Stars: Abundances
Scientific paper
Chemical features of the local disk have firmly established the picture for the formation of the Galactic disk that the star formation has proceeded under the continuous accretion of low-metallicity gas from the halo. It sets two determinant processes for the evolution of deuterium (D), that is, the destruction of D in the interior of stars and the supply of new (nearly) primordial D associated with the gas infall. Conventional Galactic chemical evolution (GCE) models predict that this scheme leads to a monotonic decrease in D/H with time and ends up in the present-day D/H abundance (D/H)0 which is severely lower than the recently observed estimates. These predicted features are the natural results of a construction of the metal-rich (~solar abundance) local star+gas system. Here we propose that the new GCE models, that incorporate large-scale winds form the Galactic bulge which entrain heavy elements and drop them on the disk with the recent tendency of star formation in tune with the observed implications, make the system rich in both metals and D. In addition, our finding of a gradual increase in D/H with time during the last several Gyr is observationally supported by the D/H abundance for the protosolar cloud lower than (D/H)0.
Bland-Hawthorn Joss
Tsujimoto Takuji
No associations
LandOfFree
Chemical evolution of D in the Local Disk 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 Chemical evolution of D in the Local Disk, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chemical evolution of D in the Local Disk will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1583491