Saved in:
| Main Authors: | , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2501.17933 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866913670806634496 |
|---|---|
| author | Feder, Richard M. Bock, James J. Cheng, Yun-Ting Cooray, Asantha Korngut, Phillip M. Matsuura, Shuji Mirocha, Jordan Nguyen, Chi H. Takimoto, Kohji Tsumura, Kohji Wills, Ryan Zemcov, Michael collaboration, CIBER |
| author_facet | Feder, Richard M. Bock, James J. Cheng, Yun-Ting Cooray, Asantha Korngut, Phillip M. Matsuura, Shuji Mirocha, Jordan Nguyen, Chi H. Takimoto, Kohji Tsumura, Kohji Wills, Ryan Zemcov, Michael collaboration, CIBER |
| contents | We present new anisotropy measurements in the near-infrared (NIR) for angular multipoles $300<\ell<10^5$ using imaging data at 1.1 $μ$m and 1.8 $μ$m from the fourth flight of the Cosmic Infrared Background ExpeRiment (CIBER). Using improved analysis methods and higher quality fourth flight data, we detect surface brightness fluctuations on scales $\ell<2000$ with CIBER auto-power spectra at $\sim14σ$ and 18$σ$ for 1.1 and 1.8 $μ$m, respectively, and at $\sim10σ$ in cross-power spectra. The CIBER measurements pass internal consistency tests and represent a $5-10\times$ improvement in power spectrum sensitivity on several-arcminute scales relative to that of existing studies. Through cross-correlations with tracers of diffuse galactic light (DGL), we determine that scattered DGL contributes $<10\%$ to the observed fluctuation power at high confidence. On scales $θ> 5'$, the CIBER auto- and cross-power spectra exceed predictions for integrated galactic light (IGL) and integrated stellar light (ISL) by over an order of magnitude, and are inconsistent with our baseline IGL+ISL+DGL model at high significance. We cross-correlate two of the CIBER fields with 3.6 $μ$m and 4.5 $μ$m mosaics from the Spitzer Deep Wide-Field Survey and find similar evidence for departures from Poisson noise in Spitzer-internal power spectra and CIBER $\times$ Spitzer cross-power spectra. A multi-wavelength analysis indicates that the auto-power of the fluctuations at low-$\ell$ is bluer than the Poisson noise from IGL and ISL; however, for $1' <θ< 10'$, the cross-correlation coefficient $r_{\ell}$ of nearly all band combinations decreases with increasing $θ$, disfavoring astrophysical explanations that invoke a single correlated sky component. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_17933 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | CIBER 4th flight fluctuation analysis: Measurements of near-IR auto- and cross-power spectra on arcminute to sub-degree scales Feder, Richard M. Bock, James J. Cheng, Yun-Ting Cooray, Asantha Korngut, Phillip M. Matsuura, Shuji Mirocha, Jordan Nguyen, Chi H. Takimoto, Kohji Tsumura, Kohji Wills, Ryan Zemcov, Michael collaboration, CIBER Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies We present new anisotropy measurements in the near-infrared (NIR) for angular multipoles $300<\ell<10^5$ using imaging data at 1.1 $μ$m and 1.8 $μ$m from the fourth flight of the Cosmic Infrared Background ExpeRiment (CIBER). Using improved analysis methods and higher quality fourth flight data, we detect surface brightness fluctuations on scales $\ell<2000$ with CIBER auto-power spectra at $\sim14σ$ and 18$σ$ for 1.1 and 1.8 $μ$m, respectively, and at $\sim10σ$ in cross-power spectra. The CIBER measurements pass internal consistency tests and represent a $5-10\times$ improvement in power spectrum sensitivity on several-arcminute scales relative to that of existing studies. Through cross-correlations with tracers of diffuse galactic light (DGL), we determine that scattered DGL contributes $<10\%$ to the observed fluctuation power at high confidence. On scales $θ> 5'$, the CIBER auto- and cross-power spectra exceed predictions for integrated galactic light (IGL) and integrated stellar light (ISL) by over an order of magnitude, and are inconsistent with our baseline IGL+ISL+DGL model at high significance. We cross-correlate two of the CIBER fields with 3.6 $μ$m and 4.5 $μ$m mosaics from the Spitzer Deep Wide-Field Survey and find similar evidence for departures from Poisson noise in Spitzer-internal power spectra and CIBER $\times$ Spitzer cross-power spectra. A multi-wavelength analysis indicates that the auto-power of the fluctuations at low-$\ell$ is bluer than the Poisson noise from IGL and ISL; however, for $1' <θ< 10'$, the cross-correlation coefficient $r_{\ell}$ of nearly all band combinations decreases with increasing $θ$, disfavoring astrophysical explanations that invoke a single correlated sky component. |
| title | CIBER 4th flight fluctuation analysis: Measurements of near-IR auto- and cross-power spectra on arcminute to sub-degree scales |
| topic | Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2501.17933 |