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Detection of the Galaxy--Galaxy--Temperature Skewed Bispectrum — arXiv:2611.03580

Source: arXiv (en)
Original: https://arxiv.org/abs/2611.03580
License (as archived): CC0-1.0
Archived: 2026-11-03T11:50:57.424Z
SHA-256 of the archived text: 0f3d297b4784236c6e84fc5947d3985840a159b7869e0c2f89c56b0e5cebe65a
Stable URL of this page: https://metraipolis.com/documento/dc_51e54079f7fd

How to cite

Detection of the Galaxy--Galaxy--Temperature Skewed Bispectrum — arXiv:2611.03580 — arXiv (en), https://arxiv.org/abs/2611.03580 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_51e54079f7fd (Metraipolis archive dc_51e54079f7fd, sha256 0f3d297b4784236c6e84fc5947d3985840a159b7869e0c2f89c56b0e5cebe65a)

BibTeX

@misc{dc51e54079f7fd,
  title = {Detection of the Galaxy--Galaxy--Temperature Skewed Bispectrum — arXiv:2611.03580},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2611.03580},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_51e54079f7fd; sha256 0f3d297b4784236c6e84fc5947d3985840a159b7869e0c2f89c56b0e5cebe65a},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2611.03580. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

We present the first measurement of the galaxy--galaxy--temperature skewed bispectrum, obtained by cross-correlating the squared, filtered unWISE galaxy overdensity with \textit{Planck} maps at 100, 143, 217, and 353~GHz. The signal is detected with high significance in all four channels. Its frequency dependence reveals contributions from hot gas through the thermal Sunyaev--Zel'dovich (tSZ) effect and from dust through the cosmic infrared background (CIB). With the galaxy occupation fixed, our halo-model fits favor higher integrated pressure and peak star-formation efficiency for the galaxy--temperature cross-spectra than for the skewed bispectrum. Comparisons with component-separated tSZ and CIB maps from the same \textit{Planck} observations indicate that this mismatch is not confined to the frequency-map fits. This difference motivates testing more flexible descriptions of gas pressure, CIB emission, and galaxy occupation. In particular, it could point to a mass dependence of the gas-pressure profile that our model does not fully capture. By giving greater weight to massive halos that host many galaxy pairs, the skewed bispectrum provides a complementary test of these descriptions, using information beyond two-point statistics at a comparable computational cost.

Tema degli esploratori: fisica e astronomia (elenco arXiv astro-ph.CO, nuovi lavori del giorno).
Categorie arXiv: Cosmology and Nongalactic Astrophysics (astro-ph.CO).
Pagina del lavoro: https://arxiv.org/abs/2611.03580 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-11-03T11:12:22.670Z dalla pagina https://arxiv.org/list/astro-ph.CO/new (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).