Detecting z > 10 objects through carbon, nitrogen and oxygen emission lines

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

15 pages, 1 postscript figures included; Uses aaspp4.sty (AASTeX v4.0); Submitted to The Astrophysical Journal

Scientific paper

10.1086/306787

By redshift of 10, star formation in the first objects should have produced considerable amounts of Carbon, Nitrogen and Oxygen. The submillimeter lines of C, N and O redshift into the millimeter and centimeter bands (0.5 mm -- 1.2 cm), where they may be detectable. High spectral resolution observations could potentially detect inhomogeneities in C, N and O emission, and see the first objects forming at high redshift. We calculate expected intensity fluctuations and discuss frequency and angular resolution required to detect them. For CII emission, we estimate the intensity using two independent methods: the line emission coefficient argument and the luminosity density argument. We find they are in good agreement. At 1+z \sim 10, the typical protogalaxy has a velocity dispersion of 30 km s^{-1} and angular size of 1 arcsecond. If CII is the dominant coolant, then we estimate a characteristic line strength of \sim 0.1 K km s^{-1}. We also discuss other atomic lines and estimate their signal. Observations with angular resolution of 10^{-3} can detect moderately nonlinear fluctuations of amplitude 2 \cdot 10^{-5} times the microwave background. If the intensity fluctuations are detected, they will probe matter density inhomogeneity, chemical evolution and ionization history at high redshifts.

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

Detecting z > 10 objects through carbon, nitrogen and oxygen emission lines 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 Detecting z > 10 objects through carbon, nitrogen and oxygen emission lines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detecting z > 10 objects through carbon, nitrogen and oxygen emission lines will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-343796

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