MAXIMUM-LIKELIHOOD ANALYSIS OF THE COBE ANGULAR-CORRELATION FUNCTION

Authors
SELJAK U BERTSCHINGER E
Citation
U. Seljak et E. Bertschinger, MAXIMUM-LIKELIHOOD ANALYSIS OF THE COBE ANGULAR-CORRELATION FUNCTION, The Astrophysical journal, 417(1), 1993, pp. 120000009-120000012
Citations number
15
Categorie Soggetti
Astronomy & Astrophysics
Journal title
The Astrophysical journal → ACNP
ISSN journal
0004637X
Volume
417
Issue
1
Year of publication
1993
Part
2
Pages
120000009 - 120000012
Database
ISI
SICI code
0004-637X(1993)417:1<120000009:MAOTCA>2.0.ZU;2-Y
Abstract
We have used maximum-likelihood estimation to determine the quadrupole amplitude Q(rms-PS) and the spectral index n of the density fluctuati on power spectrum at recombination from the COBE DMR data. We find a s trong correlation between the two parameters of the form Q(rms-PS) = ( 15.7 +/- 2.6) exp [0.46(1 - n)] muK for fixed n. Our result is slightl y smaller than and has a smaller statistical uncertainty than the 1992 estimate of Smoot et al.