MEASUREMENTS OF SECONDARY COSMIC MICROWAVE BACKGROUND ANISOTROPIES WITH THE SOUTH POLE TELESCOPE
Bibliographic record
Abstract
We report cosmic microwave background (CMB) power spectrum measurements from\nthe first 100 sq. deg. field observed by the South Pole Telescope (SPT) at 150\nand 220 GHz. On angular scales where the primary CMB anisotropy is dominant,\nell ~< 3000, the SPT power spectrum is consistent with the standard LambdaCDM\ncosmology. On smaller scales, we see strong evidence for a point source\ncontribution, consistent with a population of dusty, star-forming galaxies.\nAfter we mask bright point sources, anisotropy power on angular scales of 3000\n< ell < 9500 is detected with a signal-to-noise > 50 at both frequencies. We\ncombine the 150 and 220 GHz data to remove the majority of the point source\npower, and use the point source subtracted spectrum to detect\nSunyaev-Zel'dovich (SZ) power at 2.6 sigma. At ell=3000, the SZ power in the\nsubtracted bandpowers is 4.2 +/- 1.5 uK^2, which is significantly lower than\nthe power predicted by a fiducial model using WMAP5 cosmological parameters.\nThis discrepancy may suggest that contemporary galaxy cluster models\noverestimate the thermal pressure of intracluster gas. Alternatively, this\nresult can be interpreted as evidence for lower values of sigma8. When combined\nwith an estimate of the kinetic SZ contribution, the measured SZ amplitude\nshifts sigma8 from the primary CMB anisotropy derived constraint of 0.794 +/-\n0.028 down to 0.773 +/- 0.025. The uncertainty in the constraint on sigma8 from\nthis analysis is dominated by uncertainties in the theoretical modeling\nrequired to predict the amplitude of the SZ power spectrum for a given set of\ncosmological parameters.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".