Query : 2011A&A...531A..10T

2011A&A...531A..10T - Astronomy and Astrophysics, volume 531A, 10-10 (2011/7-1)

On Oepik's distance evaluation method in a cosmological context.


Abstract (from CDS):

Oepik derived the distance to M31 using its rotation, flux and angular size. We describe his method and its reliance on the mass-to-luminosity ratio M/L in an instructive way and consider it formally within a family of dynamical cosmic distance indicators. We consider ways of overcoming the M/d degeneracy in methods where together with the dynamical equation one uses an auxiliary relation M ∼dn to infer the distance d (with examples for n= 0, 1, 2, 3). As a possible deep space analog to Oepik's method we assess hypothetical Eddington radiators (M/L=M/LEdd). We describe ways of calibrating Oepik-related methods that do not use directly the angular size and consider their sensitivity to the used local H0. We find, for instance, that when the size-luminosity relation is calibrated using distance-independent reverberation mapping to infer the BLR size, the derived mass M∝LαΔλ2 does not depend on H0, whereas the Eddington ratio Lbol/LEdd does (as ∝ H0–2). This is illustrated using very luminous yet quiescent radio quasars at redshifts 0.5-1.6.

Abstract Copyright:

Journal keyword(s): galaxies: distances and redshifts - distance scale

Simbad objects: 2

goto Full paper

goto View the references in ADS

Number of rows : 2
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12387 1
2 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2317 3

To bookmark this query, right click on this link: simbad:objects in 2011A&A...531A..10T and select 'bookmark this link' or equivalent in the popup menu


© Université de Strasbourg/CNRS

    • Contact