Resolved SED modelling with JWST and ALMA: the role of stellar mass surface density in regulating star formation in cosmic noon galaxies

@misc{liao2026resolved,
  title = {{Resolved SED modelling with JWST and ALMA: the role of stellar mass surface density in regulating star formation in cosmic noon galaxies}},
  author = {Cheng-Lin Liao and Leindert A. Boogaard and Jacqueline A. Hodge and J. Li and E. da Cunha and P. Sharda and A. Battisti and C. Lagos and M. Kaasinen and I. Smail and M. Aravena and F. E. Bauer and R. K. Cochrane and L. Colina and P. Cox and R. Decarli and T. Díaz-Santos and R. Fernández Aranda and N. N. Geesink and H. Inami and B. Magnelli and J. Melinder and M. Neeleman and G. Östlin and G. Popping and D. A. Riechers and I. Shivaei and P. van der Werf and F. Walter and A. Weiss},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2609.12059},
  eprint = {2609.12059},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.12059},
}

TY  - UNPB
TI  - Resolved SED modelling with JWST and ALMA: the role of stellar mass surface density in regulating star formation in cosmic noon galaxies
AU  - Cheng-Lin Liao
AU  - Leindert A. Boogaard
AU  - Jacqueline A. Hodge
AU  - J. Li
AU  - E. da Cunha
AU  - P. Sharda
AU  - A. Battisti
AU  - C. Lagos
AU  - M. Kaasinen
AU  - I. Smail
AU  - M. Aravena
AU  - F. E. Bauer
AU  - R. K. Cochrane
AU  - L. Colina
AU  - P. Cox
AU  - R. Decarli
AU  - T. Díaz-Santos
AU  - R. Fernández Aranda
AU  - N. N. Geesink
AU  - H. Inami
AU  - B. Magnelli
AU  - J. Melinder
AU  - M. Neeleman
AU  - G. Östlin
AU  - G. Popping
AU  - D. A. Riechers
AU  - I. Shivaei
AU  - P. van der Werf
AU  - F. Walter
AU  - A. Weiss
PY  - 2026
DA  - 2026/10/13
PB  - arXiv
DO  - 10.48550/arxiv.2609.12059
UR  - https://arxiv.org/abs/2609.12059
AB  - We present kpc-scale ($0.2''-0.5''$) physical property maps of 35 main-sequence galaxies at z ≈ 0.5−3.7, with stellar masses of log(M_*/M_⊙) ∼ 9.7−11.7 and star formation rates of SFR ∼ 1.4−280 M_⊙ yr^−1, selected from the ALMA Spectroscopic Survey (ASPECS) in the Hubble Ultra Deep Field. Leveraging the unique HST, JWST (NIRCam and MIRI), and ALMA observations, we perform spatially resolved spectral energy distribution (SED) modeling across the UV-to-FIR regime. We find that incorporating MIRI and/or ALMA data reduces the overestimation of dust luminosity (by up to ∼0.8 dex), while ALMA observations further mitigate the age-dust degeneracy. In the absence of such data, restricting the SED model library based on the observed unresolved colors can partially mitigate these biases. The stellar masses (M_*) derived from resolved and unresolved modeling are consistent within ∼0.05 dex, suggesting that mass discrepancies (attributed to outshining) are less significant for cosmic noon main-sequence galaxies when rest-frame near-infrared (NIR; e.g., ∼1−3 μm) data are included. After normalization to the same reference, the composite SED of our sample closely resembles that of local starburst galaxies such as M82, suggesting similar dust attenuation and re-emission properties. Finally, we find that the molecular gas fraction and depletion time correlate with the effective stellar mass surface density (Σ_eff,* = M_*/2πR_eff,M_*^2) similarly to that observed in local galaxies. These results provide a first qualitative view of how the stellar gravitational potential influences gas regulation and star formation in galaxies beyond the local Universe.
ER  -