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Article Dans Une Revue Astrophys.J. Année : 2023

Cosmicflows-4

R. Brent Tully
  • Fonction : Auteur
Ehsan Kourkchi
  • Fonction : Auteur
Gagandeep S. Anand
  • Fonction : Auteur
John P. Blakeslee
  • Fonction : Auteur
Dillon Brout
  • Fonction : Auteur
Thomas de Jaeger
  • Fonction : Auteur
Alexandra Dupuy
  • Fonction : Auteur
Cullan Howlett
  • Fonction : Auteur
Joseph B. Jensen
  • Fonction : Auteur
Luca Rizzi
  • Fonction : Auteur
David Rubin
  • Fonction : Auteur
Khaled Said
  • Fonction : Auteur
Daniel Scolnic
  • Fonction : Auteur
Benjamin E. Stahl
  • Fonction : Auteur

Résumé

With Cosmicflows-4, distances are compiled for 55,877 galaxies gathered into 38,065 groups. Eight methodologies are employed, with the largest numbers coming from the correlations between the photometric and kinematic properties of spiral galaxies (TF) and elliptical galaxies (FP). Supernovae that arise from degenerate progenitors (SNIa) are an important overlapping component. Smaller contributions come from distance estimates from the surface brightness fluctuations of elliptical galaxies (SBF) and the luminosities and expansion rates of core collapse supernovae (SNII). Cepheid Period-Luminosity Relation (CPLR) and Tip of the Red Giant Branch (TRGB) observations founded on local stellar parallax measurements along with the geometric maser distance to NGC 4258 provide the absolute scaling of distances. The assembly of galaxies into groups is an important feature of the study in facilitating overlaps between methodologies. Merging between multiple contributions within a methodology and between methodologies is carried out with Bayesian Markov chain Monte Carlo procedures. The final assembly of distances is compatible with a value of the Hubble constant of $H_0=75.0$ km s$^{-1}$ Mpc$^{-1}$ with the small statistical error $\pm$$0.8$ km s$^{-1}$ Mpc$^{-1}$ but a large potential systematic error ~3 km s$^{-1}$ Mpc$^{-1}$. Peculiar velocities can be inferred from the measured distances. The interpretation of the field of peculiar velocities is complex because of large errors on individual components and invites analyses beyond the scope of this study.

Dates et versions

hal-03815514 , version 1 (14-10-2022)

Identifiants

Citer

R. Brent Tully, Ehsan Kourkchi, Helene M. Courtois, Gagandeep S. Anand, John P. Blakeslee, et al.. Cosmicflows-4. Astrophys.J., 2023, 944 (1), pp.94. ⟨10.3847/1538-4357/ac94d8⟩. ⟨hal-03815514⟩
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