LIM25 - Annecy

Session

Contributed Talks 11: LIM Analysis and Modeling

4 juin 2025, 16:05

Laboratoire d'Annecy de Physique Théorique (LAPTh)

Présidents de session

Contributed Talks 11: LIM Analysis and Modeling

• Lunjun Liu (Caltech)
• Yun-Ting Cheng (California Institute of Technology)
• Delaney Dunne (California Institute of Technology)

Documents de présentation

Dunne_Delaney.pdf

Liu_SimonLunjun.pdf

YunTingCheng_LIM25.pdf

70. PAH Intensity Mapping with SPHEREx and PRIMA

Yun Ting Cheng

04/06/2025 16:05

Polycyclic aromatic hydrocarbons (PAHs) produce some of the most prominent emission features in the infrared spectra of galaxies. PAHs play a crucial role in the thermal balance and chemistry of the ISM and serve as a good tracers of star formation activity and dust abundance. Ongoing and planned upcoming missions such as SPHEREx and PRIMA will enable the study of multiple PAH features in...

55. Three-Dimensional Stacking as a LIM Statistic

Delaney Dunne (California Institute of Technology)

04/06/2025 16:25

LIM will rely heavily on joint analyses with traditional catalogs of galaxies to increase sensitivity, mitigate systematic errors, and study the coevolution of different tracers of galaxy formation and evolution. The joint analysis of choice has traditionally been cross-correlation, for its information content across a range of spatial scales, but other techniques can complement and extend...

73. Understanding the extended [CII] halo and its implications for LIM with cosmological zoomed simulations

Lunjun Liu (Caltech)

04/06/2025 16:40

Several ALMA programs have shown the ubiquity of extended [CII] halos in high-redshift galaxies. Not only can such extended structures potentially affect the [CII] line intensity mapping (LIM) signal, but they also provide a unique avenue to understand the formation and evolution of high-z galaxies, whose supernova-driven outflows may eject [CII]-emitting gas from star-forming regions out to...

59. Understanding the LIM Galaxy Power Spectrum: The Role of Shot Noise, Satellite Galaxies, and Secondary Bias

Rui Lan Jun (University of Tokyo)

We present a physically motivated model for the power spectrum of galaxies weighted by their star formation rates, decomposing it into a 1-halo and 2-halo term while incorporating key effects such as nonlinear bias, scale-dependent shot noise and halo exclusion. Our model reproduces the LIM TNG power spectrum to within a few percent across all scales. We find that omitting satellite galaxies...