Metraipolis › archive › dc_cfdc1baba267

An Empirically Calibrated [C II] Luminosity-Halo Mass Relation for Line Intensity Mapping — arXiv:2610.40550

Source

arXiv (en)

Original

https://arxiv.org/abs/2610.40550

License (as archived)

CC0-1.0

Archived

2026-11-01T02:56:42.828Z

SHA-256 of the archived text

1729d30cba866f6fe499003e5773db7883c4cace4499c6c027883f972cb64d6d

Stable URL of this page

https://metraipolis.com/documento/dc_cfdc1baba267

How to cite

An Empirically Calibrated [C II] Luminosity-Halo Mass Relation for Line Intensity Mapping — arXiv:2610.40550 — arXiv (en), https://arxiv.org/abs/2610.40550 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_cfdc1baba267 (Metraipolis archive dc_cfdc1baba267, sha256 1729d30cba866f6fe499003e5773db7883c4cace4499c6c027883f972cb64d6d)

@misc{dccfdc1baba267,
  title = {An Empirically Calibrated [C II] Luminosity-Halo Mass Relation for Line Intensity Mapping — arXiv:2610.40550},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2610.40550},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_cfdc1baba267; sha256 1729d30cba866f6fe499003e5773db7883c4cace4499c6c027883f972cb64d6d},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2610.40550. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Millimeter-wave line intensity mapping aims to observe the high-redshift universe through the 158 $\mu$m fine-structure line of [C II], the brightest far-infrared line of star-forming galaxies. Whether a [C II] experiment at $z>4$ measures the clustering of large-scale structure, which carries rich cosmological information, rather than the shot noise of the emitters depends on the amplitude and the shape of the [C II] power spectrum. Forecasts often build the power spectrum from a halo mass--luminosity relation, $L(M_h)$, chained from scaling relations measured in other regimes or read off simulations, without a quantified uncertainty. We instead calibrate a double power-law $L(M_h,z)$ on [C II] data alone: the mean [C II] intensity from tomographic cross-correlation at $0.4<z<4.2$ and the luminosity-function measurements and limits at $z\simeq0$ and $4.3\lesssim z\lesssim8$. The four parameters of the double power law are fitted at $z=4.5$ and $5.5$ separately, with no assumption about their evolution, and then jointly across $0<z<7$, and we examine how the uncertainty depends on the modeling assumptions. The shape of the power spectrum is settled by the existing data. The clustering peak stands a factor of $45\,(23$-$93)$ and $64\,(38$-$112)$ above the shot-noise floor at $z=4.5$ and $5.5$, and the two cross at $k_c\simeq0.37$ and $0.44\,h$Mpc$^{-1}$. The amplitude is known less well, the clustering power to $0.5-0.6$ dex and the shot noise to $0.7-0.9$ dex. The results show that the signal comes from halos accessible by current galaxy surveys, those that host the Lyman-break galaxies and Ly$\alpha$ emitters at these redshifts. The luminosity-weighted bias is relatively high, with values of $4-5$.

Tema degli esploratori: fisica e astronomia (elenco arXiv astro-ph.CO, nuovi lavori del giorno).
Categorie arXiv: Cosmology and Nongalactic Astrophysics (astro-ph.CO) ; Astrophysics of Galaxies (astro-ph.GA).
Pagina del lavoro: https://arxiv.org/abs/2610.40550 — 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 2026-11-01T02:22:28.287Z dalla pagina https://arxiv.org/list/astro-ph.CO/new (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).