A multiprobe ΛCDM consistency analysis with gravitational-wave standard sirens

@misc{abbott2026multiprobe,
  title = {{A multiprobe $Λ$CDM consistency analysis with gravitational-wave standard sirens}},
  author = {T. M. C. Abbott and M. Aguena and F. Andrade-Oliveira and S. Avila and D. Bacon and D. Brooks and H. Camacho and R. Camilleri and G. Campailla and A. Carnero Rosell and J. Carretero and R. Cawthon and C. Chang and L. N. da Costa and M. E. da Silva Pereira and S. Desai and H. T. Diehl and P. Doel and A. Ferté and D. L. Hollowood and K. Honscheid and D. Huterer and D. Laghi and S. Lee and S. MacBride and J. L. Marshall and I. McMahon and J. Mena-Fernández and R. Miquel and J. Muir and J. Myles and R. L. C. Ogando and A. A. Plazas Malagón and J. Prat and M. Rodríguez-Monroy and R. Rosenfeld and S. Samuroff and E. Sanchez and D. Sanchez-Cid and I. Sevilla-Noarbe and M. Soares-Santos and E. Suchyta and M. E. C. Swanson and V. Vikram and N. Weaverdyck and J. Weller and M. Yamamoto},
  howpublished = {arXiv},
  year = {2026},
  month = nov,
  doi = {10.48550/arxiv.2611.00415},
  eprint = {2611.00415},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2611.00415},
}

TY  - UNPB
TI  - A multiprobe ΛCDM consistency analysis with gravitational-wave standard sirens
AU  - T. M. C. Abbott
AU  - M. Aguena
AU  - F. Andrade-Oliveira
AU  - S. Avila
AU  - D. Bacon
AU  - D. Brooks
AU  - H. Camacho
AU  - R. Camilleri
AU  - G. Campailla
AU  - A. Carnero Rosell
AU  - J. Carretero
AU  - R. Cawthon
AU  - C. Chang
AU  - L. N. da Costa
AU  - M. E. da Silva Pereira
AU  - S. Desai
AU  - H. T. Diehl
AU  - P. Doel
AU  - A. Ferté
AU  - D. L. Hollowood
AU  - K. Honscheid
AU  - D. Huterer
AU  - D. Laghi
AU  - S. Lee
AU  - S. MacBride
AU  - J. L. Marshall
AU  - I. McMahon
AU  - J. Mena-Fernández
AU  - R. Miquel
AU  - J. Muir
AU  - J. Myles
AU  - R. L. C. Ogando
AU  - A. A. Plazas Malagón
AU  - J. Prat
AU  - M. Rodríguez-Monroy
AU  - R. Rosenfeld
AU  - S. Samuroff
AU  - E. Sanchez
AU  - D. Sanchez-Cid
AU  - I. Sevilla-Noarbe
AU  - M. Soares-Santos
AU  - E. Suchyta
AU  - M. E. C. Swanson
AU  - V. Vikram
AU  - N. Weaverdyck
AU  - J. Weller
AU  - M. Yamamoto
PY  - 2026
DA  - 2026/11/01
PB  - arXiv
DO  - 10.48550/arxiv.2611.00415
UR  - https://arxiv.org/abs/2611.00415
AB  - Multi-messenger cosmology offers an independent path to stress-test the ΛCDM model as gravitational wave (GW) catalogs grow in size. We present the first multiprobe assessment of ΛCDM tensions incorporating GW standard sirens: LIGO-Virgo-KAGRA Collaboration (LVK) fifth Gravitational-Wave Transient Catalog (GWTC-5.0) standard sirens are combined with Dark Energy Survey (DES) Year 6 weak lensing and galaxy clustering (3×2pt), baryon acoustic oscillations (BAO), and type Ia supernovae (SNe Ia), together with Dark Energy Spectroscopic Instrument (DESI) BAO, and confronted with primary cosmic microwave background (CMB) measurements from Planck, the Atacama Cosmology Telescope (ACT), and the South Pole Telescope (SPT). All probes are analyzed under homogeneous priors and combined via normalizing flows, and we quantify the S_8 discrepancy and H_0 tension with respect to CMB. Adding standard sirens to the 3×2pt analysis improves the constraints in the Ω_m-S_8 plane by ∼30%, while constraining H_0 to 6.2%. We present cosmological constraints from the low-redshift probes including standard sirens, yielding S_8 = 0.793 ± 0.010, Ω_m = 0.308^+0.007_−0.006, and H_0 = 69.4^+4.1_−4.4 km s^−1 Mpc^−1. At current GW sensitivity, however, both the S_8 discrepancy and the H_0 tension remain essentially unchanged. Our analysis nonetheless delivers the first assessment of ΛCDM tensions computed with standard sirens included among the probes, and establishes them as a mature cosmological probe -- ready to be combined on equal footing with established datasets in forthcoming surveys such as the Legacy Survey of Space and Time (LSST), Euclid, and Roman.
ER  -