Iron Abundance at Redshift z~eq4.5

Details Iron Abundance at Redshift z~eq4.5 Iron Abundance at Redshift z~eq4.5

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000noao.prop...75d&link_type=abstract

NOAO Proposal ID #2000B-0075

Mathematics

Logic

Scientific paper

Quasars at high redshift (z>=3) show solar or even enhanced metallicities which require a violent star formation phase. The nucleosynthesis timescales and yields for (alpha) -elements like oxygen, neon, magnesium, or silicon and iron are significantly different and this cause an enrichment delay of the order of ~1-2 Gyrs for iron. Hence, the abundance ratio iron/(alpha) -element is a potentially useful cosmological clock to identify the epoch of the first star formation in galaxies in the early universe. If Fe II emission at high redshift (z> 4) is attributed to an overabundance of iron the epoch of the first star formation phase would start at redshift z~10. Therefore, we will measure the Fe II and Mg II 2798 emission lines for quasars at redshift z~eq4.5. We will analyse the spectra of the proposed quasars by applying FeII and Balmer continuum emission templates, and a power law continuum to the recorded spectra. We apply for 4 nights observing time at the 4 m telescope at CTIO using OSIRIS to measure rest frame near ultraviolet spectra (170nm< (lambda) _rest < 430nm) of 3 quasars with redshift z~eq4.5.

Affiliated with

Also associated with

No associations

Rating

Iron Abundance at Redshift z~eq4.5 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 Iron Abundance at Redshift z~eq4.5, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Iron Abundance at Redshift z~eq4.5 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-891594