Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978mnras.182..727d&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 182, Mar. 1978, p. 727-733.
Astronomy and Astrophysics
Astronomy
22
Emission Spectra, Hydrogen Clouds, Neutral Particles, Red Shift, Astronomical Models, H Lines, Spectral Line Width, Universe
Scientific paper
A search has been made for the redshifted neutral hydrogen emission from primordial protoclusters at early epochs in the history of the universe. A system with a 2.5-MHz bandwidth was used to investigate 20 intermediate-latitude fields at frequencies of 328 and 240 MHz which correspond to neutral hydrogen redshifts of z = 3.33 and 4.92. Upper limits of peak flux density as low as 50 and 11 mJy have been set in fields at the two frequencies. These results are used to derive a limit to the properties of protoclusters in the early universe on the model proposed by Sunyaev and Zeldovich; either their masses are less than or approximately equal to 3 x 10 to the 15th solar masses or the number of such objects in the early universe is less than or approximately equal to 10 to the 6th.
Davies Rhodri D.
Mirabel Felix I.
Pedlar Alan
No associations
LandOfFree
A search for neutral hydrogen in primordial protoclusters at Z = 3.33 and 4.92 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 A search for neutral hydrogen in primordial protoclusters at Z = 3.33 and 4.92, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A search for neutral hydrogen in primordial protoclusters at Z = 3.33 and 4.92 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1082712