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@arXiv_condmatsoft_bot@mastoxiv.page
2026-08-12 09:08:45

Replaced article(s) found for cond-mat.soft. arxiv.org/list/cond-mat.soft/n
[1/1]:
- Bridging the Gap Between Avalanche Relaxation and Yielding Rheology
Leonardo Relmucao-Leiva, Carlos Villarroel, Gustavo D\"uring
arxiv.org/abs/2504.18382 mastoxiv.page/@arXiv_condmatso
- Mesoscale model of a three-dimensional odd fluid
Yuxing Jiao, Mingcheng Yang
arxiv.org/abs/2508.04420 mastoxiv.page/@arXiv_condmatso
- Thermodynamically Consistent Modeling of ATP-Driven Cross-Bridge Dynamics in Muscle Contraction
Yiwei Wang, Chun Liu
arxiv.org/abs/2602.01743 mastoxiv.page/@arXiv_condmatso
- Beyond the Markovian limit: Exact solutions for active motion in a power-law viscoelastic bath
Mintu Karmakar, Jure Dobnikar, Ignacio Pagonabarraga
arxiv.org/abs/2606.10145 mastoxiv.page/@arXiv_condmatso
- Costs and benefits of phytoplankton motility
Peyman Fahimi, Andrew J. Irwin, Michael Lynch
arxiv.org/abs/2503.14625 mastoxiv.page/@arXiv_physicsbi
- Percolation and criticality of systems with competing interactions on Bethe lattices: limitations...
Miranda, Zheng, Charbonneau, Coniglio, Cugliandolo, Tarzia
arxiv.org/abs/2510.02961 mastoxiv.page/@arXiv_condmatst
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@arXiv_astrophGA_bot@mastoxiv.page
2026-07-22 08:03:31

Vz-GAL Dusty Star-Forming Galaxies: Revisiting the CO-H2 Conversion Factor Tension
Prachi Prajapati, Axel Weiss, Dominik Riechers, Tom J. L. C. Bakx, Leindert A. Boogaard, Diana Ismail, Pierre Cox, Andrew J. Baker, Roberto Neri, Matthew Lehnert, Chentao Yang, Emilio Romano-Diaz, Hiddo S. B. Algera, Stefano Berta, Edoardo Borsato, Kirsty M. Butler, Asantha Cooray, Bethany Jones, Amelie Saintonge, Paul van der Werf
arxiv.org/abs/2607.18440 arxiv.org/pdf/2607.18440 arxiv.org/html/2607.18440
arXiv:2607.18440v1 Announce Type: new
Abstract: The CO luminosity-to-H$_2$ mass conversion factor ($\alpha_{CO}$) remains a debated uncertainty in determining molecular gas masses of high-redshift dusty star-forming galaxies (DSFGs). Dynamical mass constraints have often favored $\alpha_{CO}=0.8$~$M_{\odot}~{(K~km~{s}^{-1}~{pc}^{2})}^{-1}$, whereas dust- and radiative-transfer-based methods imply higher values. We revisit this ``tension" using the largest homogeneous sample of 21 unlensed $z\sim1-4$ DSFGs, with securely measured \coonezero luminosities from the VLA \vzgal survey and resolved ($\sim{0.1}^{\prime\prime}$) ALMA 1~mm dust continuum imaging. For 12 galaxies with robust modeling constraints, we derive molecular gas masses using dust spectral energy distribution modeling and the TUNER LVG framework, adopting a solar-metallicity gas-to-dust mass ratio of 100. Although not fully independent due to shared assumptions on dust properties, these approaches yield mutually consistent gas masses corresponding to $\alpha_{CO}\sim1.5-11.5$, with a median near the Galactic $\alpha_{CO}=4.3$. Isotropic virial dynamical masses agree with these gas masses when realistic molecular gas sizes are adopted, while our proposed ``mixed" (rotating, pressure-supported, thick-disk) estimator systematically underestimates dynamical masses, producing low $\alpha_{CO}$ limits. Using GN20 ($z=4.055$) as a case study, we show that resolved gas geometry and kinematics reconcile the discrepancy with LVG-derived $\alpha_{CO}$. Our results suggest that current data do not require $\alpha_{CO}=0.8$, and intermediate to near-Galactic values remain dynamically viable given uncertainties in gas geometry, dust properties, and gas-to-dust ratios. Further progress in calibrating $\alpha_{CO}$ in the early universe will require resolved molecular gas observations, physically motivated ISM modeling, and stringent constraints on dust properties.
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